Add database framework to ORTE and refactor modex code to utilize it. Create the "hash" db component from the prior modex db code. Leave the other components ignored for now - will activate them later.

Modex is still a blocking operation at this point.

This commit was SVN r26618.

ompi/runtime/ompi_module_exchange.c

@@ -9,7 +9,7 @@
  *                         University of Stuttgart.  All rights reserved.
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
- * Copyright (c) 2006-2007 Los Alamos National Security, LLC.  All rights
+ * Copyright (c) 2006-2012 Los Alamos National Security, LLC.  All rights
  *                         reserved.
  * $COPYRIGHT$
  *
@@ -64,7 +64,7 @@ ompi_modex_recv(mca_base_component_t * component,
         return OMPI_ERR_OUT_OF_RESOURCE;
     }
     
-    rc = orte_grpcomm.get_proc_attr(proc->proc_name, name, buffer, size);
+    rc = orte_grpcomm.get_proc_attr(&proc->proc_name, name, buffer, size);
     free(name);
     return rc;
 }
@@ -82,7 +82,7 @@ ompi_modex_recv_string(const char* key,
                        struct ompi_proc_t *source_proc,
                        void **buffer, size_t *size)
 {
-    return orte_grpcomm.get_proc_attr(source_proc->proc_name, key, buffer, size);
+    return orte_grpcomm.get_proc_attr(&source_proc->proc_name, key, buffer, size);
 }
 
 int
@@ -122,7 +122,7 @@ ompi_modex_recv_key_value(const char* key,
     
     bo.bytes = NULL;
     bo.size = 0;
-    if (ORTE_SUCCESS != (rc = orte_grpcomm.get_proc_attr(source_proc->proc_name, key,
+    if (ORTE_SUCCESS != (rc = orte_grpcomm.get_proc_attr(&source_proc->proc_name, key,
                                                          (void**)&bo.bytes, &bsize))) {
         return rc;
     }

ompi/tools/ompi_info/components.c

@@ -99,6 +99,8 @@
 #include "orte/mca/state/base/base.h"
 #include "orte/mca/grpcomm/grpcomm.h"
 #include "orte/mca/grpcomm/base/base.h"
+#include "orte/mca/db/db.h"
+#include "orte/mca/db/base/base.h"
 #include "orte/mca/ess/ess.h"
 #include "orte/mca/ess/base/base.h"
 #include "orte/util/show_help.h"
@@ -392,6 +394,14 @@ void ompi_info_open_components(void)
     map->components = &orte_grpcomm_base.components_available;
     opal_pointer_array_add(&component_map, map);
     
+    if (ORTE_SUCCESS != orte_db_base_open()) {
+        goto error;
+    }
+    map = OBJ_NEW(ompi_info_component_map_t);
+    map->type = strdup("db");
+    map->components = &orte_db_base.available_components;
+    opal_pointer_array_add(&component_map, map);
+    
     if (ORTE_SUCCESS != orte_ess_base_open()) {
         goto error;
     }
@@ -749,6 +759,7 @@ void ompi_info_close_components()
         (void) ompi_osc_base_close();
 
         (void) orte_grpcomm_base_close();
+        (void) orte_db_base_close();
         (void) orte_ess_base_close();
         (void) orte_show_help_finalize();
 #if !ORTE_DISABLE_FULL_SUPPORT

ompi/tools/ompi_info/ompi_info.c

@@ -269,6 +269,7 @@ int main(int argc, char *argv[])
     opal_pointer_array_add(&mca_types, "errmgr");
     opal_pointer_array_add(&mca_types, "ess");
     opal_pointer_array_add(&mca_types, "grpcomm");
+    opal_pointer_array_add(&mca_types, "db");
     opal_pointer_array_add(&mca_types, "notifier");
     
     /* Execute the desired action(s) */

orte/mca/db/Makefile.am

@@ -0,0 +1,32 @@
+#
+# Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+AM_CPPFLAGS = $(LTDLINCL)
+
+# main library setup
+noinst_LTLIBRARIES = libmca_db.la
+libmca_db_la_SOURCES =
+
+# pkgdata setup
+dist_pkgdata_DATA =
+
+# local files
+headers = db.h
+libmca_db_la_SOURCES += $(headers)
+
+# Conditionally install the header files
+if WANT_INSTALL_HEADERS
+ortedir = $(includedir)/openmpi/$(subdir)
+nobase_orte_HEADERS = $(headers)
+endif
+
+include base/Makefile.am
+
+distclean-local:
+	rm -f base/static-components.h

orte/mca/db/base/Makefile.am

@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+dist_pkgdata_DATA += base/help-db-base.txt
+
+headers += \
+	base/base.h
+
+libmca_db_la_SOURCES += \
+	base/db_base_open.c \
+	base/db_base_close.c \
+	base/db_base_select.c

orte/mca/db/base/base.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+/** @file:
+ */
+
+#ifndef MCA_DB_BASE_H
+#define MCA_DB_BASE_H
+
+#include "orte_config.h"
+#include "orte/types.h"
+
+#include "opal/mca/mca.h"
+#include "opal/class/opal_list.h"
+#include "opal/mca/event/event.h"
+
+#include "orte/mca/db/db.h"
+
+BEGIN_C_DECLS
+
+/**
+ * Open the db framework
+ */
+ORTE_DECLSPEC int orte_db_base_open(void);
+
+/**
+ * Select a db module
+ */
+ORTE_DECLSPEC int orte_db_base_select(void);
+
+/**
+ * Close the db framework
+ */
+ORTE_DECLSPEC int orte_db_base_close(void);
+
+typedef struct {
+    int output;
+    opal_list_t available_components;
+    struct timeval timeout;
+} orte_db_base_t;
+ORTE_DECLSPEC extern orte_db_base_t orte_db_base;
+
+typedef struct {
+    opal_list_item_t *super;
+    orte_process_name_t name;
+    char *key;
+    opal_event_t *ev;
+    orte_db_fetch_callback_fn_t cbfunc;
+    void *cbdata;
+} orte_db_fetch_req_t;
+OBJ_CLASS_DECLARATION(orte_db_fetch_req_t);
+
+END_C_DECLS
+
+#endif

orte/mca/db/base/db_base_close.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include <stdio.h>
+
+#include "opal/mca/mca.h"
+#include "opal/util/output.h"
+#include "opal/mca/base/base.h"
+#include "opal/mca/base/mca_base_component_repository.h"
+
+#include "orte/mca/db/base/base.h"
+
+extern opal_list_t orte_db_base_components_available;
+
+int
+orte_db_base_close(void)
+{
+    if (NULL != orte_db.finalize) {
+        orte_db.finalize();
+    }
+    
+    mca_base_components_close(orte_db_base.output, 
+                              &orte_db_base.available_components, NULL);
+
+    OBJ_DESTRUCT(&orte_db_base.available_components);
+    opal_output_close(orte_db_base.output);
+    return ORTE_SUCCESS;
+}
+

orte/mca/db/base/db_base_open.c

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include "opal/mca/mca.h"
+#include "opal/util/output.h"
+#include "opal/mca/base/base.h"
+#include "opal/dss/dss_types.h"
+
+#include "orte/mca/db/base/base.h"
+
+
+/*
+ * The following file was created by configure.  It contains extern
+ * dbments and the definition of an array of pointers to each
+ * module's public mca_base_module_t struct.
+ */
+
+#include "orte/mca/db/base/static-components.h"
+
+orte_db_base_module_t orte_db;
+orte_db_base_t orte_db_base;
+
+int orte_db_base_open(void)
+{
+    orte_db_base.output = opal_output_open(NULL);
+    
+    OBJ_CONSTRUCT(&orte_db_base.available_components, opal_list_t);
+
+    /* Open up all available components */
+    if (ORTE_SUCCESS != 
+        mca_base_components_open("db", orte_db_base.output, mca_db_base_static_components, 
+                                 &orte_db_base.available_components,
+                                 true)) {
+        return ORTE_ERROR;
+    }
+
+    return ORTE_SUCCESS;
+}
+
+static void fetch_construct(orte_db_fetch_req_t *fetch)
+{
+    fetch->key = NULL;
+    fetch->ev = opal_event_alloc();
+}
+static void fetch_destruct(orte_db_fetch_req_t *fetch)
+{
+    if (NULL != fetch->key) {
+        free(fetch->key);
+    }
+    if (NULL != fetch->ev) {
+        opal_event_free(fetch->ev);
+    }
+}
+OBJ_CLASS_INSTANCE(orte_db_fetch_req_t,
+                   opal_list_item_t,
+                   fetch_construct,
+                   fetch_destruct);
+
+static void keyval_construct(orte_db_keyval_t *ptr)
+{
+    ptr->key = NULL;
+    ptr->value.bytes = NULL;
+    ptr->value.size = 0;
+}
+
+static void keyval_destruct(orte_db_keyval_t *ptr)
+{
+    if (NULL != ptr->key) {
+        free(ptr->key);
+    }
+    if (NULL != ptr->value.bytes) {
+        free(ptr->value.bytes);
+    }
+}
+OBJ_CLASS_INSTANCE(orte_db_keyval_t,
+                   opal_list_item_t,
+                   keyval_construct,
+                   keyval_destruct);
+

orte/mca/db/base/db_base_select.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include "opal/class/opal_list.h"
+#include "opal/mca/mca.h"
+#include "opal/mca/base/base.h"
+#include "opal/mca/base/mca_base_component_repository.h"
+
+#include "orte/mca/db/base/base.h"
+
+extern opal_list_t orte_db_base_components_available;
+
+int 
+orte_db_base_select(void)
+{
+    orte_db_base_component_t *best_component = NULL;
+    orte_db_base_module_t *best_module = NULL;
+
+    /*
+     * Select the best component
+     */
+    if( OPAL_SUCCESS != mca_base_select("db", orte_db_base.output,
+                                        &orte_db_base.available_components,
+                                        (mca_base_module_t **) &best_module,
+                                        (mca_base_component_t **) &best_component) ) {
+        /* It is okay to not select a component - default
+         * to using the base NULL component
+         */
+        return ORTE_SUCCESS;
+    }
+
+    /* Save and init the winner */
+    orte_db = *best_module;
+    if (NULL != orte_db.init) {
+        orte_db.init();
+    }
+
+    return ORTE_SUCCESS;
+}

orte/mca/db/base/help-db-base.txt

@@ -0,0 +1,19 @@
+ -*- text -*-
+#
+# Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+#
+# $COPYRIGHT$
+#
+# Additional copyrights may follow
+#
+# $HEADER$
+#
+# This is the US/English general help file for ORTE Errmgr HNP module.
+#
+[errmgr-hnp:unknown-job-error]
+An error has occurred in an unknown job. This generally should not happen
+except due to an internal ORTE error.
+
+Job state: %s
+
+This information should probably be reported to the OMPI developers.

orte/mca/db/db.h

@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+/** @file:
+ *
+ * The OpenRTE Database Framework
+ *
+ */
+
+#ifndef ORTE_DB_H
+#define ORTE_DB_H
+
+#include "orte_config.h"
+#include "orte/types.h"
+
+#include "opal/mca/mca.h"
+#include "opal/dss/dss_types.h"
+
+/**
+ * DATABASE DESIGN
+ *
+ * Data is always associated with a given orte process name. Individual
+ * modules may store the data local to the calling process, or on one
+ * or more remote sites. Time lags between when data is written and
+ * when it is available at a remote proc will therefore exist.
+ */
+
+BEGIN_C_DECLS
+
+/**
+ * Container for data for a particular key-value pair
+ */
+typedef struct orte_db_keyval_t {
+    /** Structure can be put on lists */
+    opal_list_item_t super;
+    /** Key */
+    char *key;
+    /** Byte object containing binary blob of data associated with this proc,key pair */
+    opal_byte_object_t value;
+} orte_db_keyval_t;
+OBJ_CLASS_DECLARATION(orte_db_keyval_t);
+
+/* define the callback function for returning data - note that
+ * the memory backing the data belongs to the DB framework. The
+ * receiver must NOT release it
+ */
+typedef void (*orte_db_fetch_callback_fn_t)(orte_process_name_t *src,
+                                            char *key,
+                                            orte_db_keyval_t *data,
+                                            int num_entries);
+
+/*
+ * Initialize the module
+ */
+typedef int (*orte_db_base_module_init_fn_t)(void);
+
+/*
+ * Finalize the module
+ */
+typedef void (*orte_db_base_module_finalize_fn_t)(void);
+
+/*
+ * Store data in the database - overwrites if already present. The data is
+ * copied into the database and therefore does not need to be preserved by
+ * the caller. Note that this is a non-blocking call - if data is stored
+ * offsite, the transfer will occur in the background.
+ */
+typedef int (*orte_db_base_module_store_fn_t)(const orte_process_name_t *proc,
+                                              const char *key,
+                                              const void *object, int32_t size);
+
+/*
+ * Retrieve data
+ *
+ * Retrieve the data for the given proc associated with the specified key. Wildcards
+ * are supported here as well. This is a non-blocking
+ * call - data will be returned via the callback function ONCE IT BECOMES AVAILABLE. Use
+ * of the "timeout" MCA parameter is encouraged to avoid hanging on fetch requests for
+ * "blocking" data that can never be resolved.
+ *
+ * NOTE: INTERIM IMPLEMENTATION WILL SIMPLY LOOKUP EXISTING DATA, RETURNING AN ERROR IF
+ * NOT ALREADY PRESENT.
+ */
+typedef int (*orte_db_base_module_fetch_fn_t)(const orte_process_name_t *proc,
+                                              const char *key,
+                                              opal_list_t *values);
+
+/*
+ * Delete data
+ *
+ * Delete the data associated with the specified key. If a NULL key is provided,
+ * all data for the given proc will be deleted.
+ *
+ * This function also supports wildcard values in the proc field. A NULL proc indicates
+ * that ALL data in the database is to be purged. A WILDCARD vpid will delete all matching
+ * keys from that jobid. Etc.
+ *
+ * Note that this is a non-blocking call - data stored off-site will be deleted asynchronously.
+ */
+typedef int (*orte_db_base_module_remove_fn_t)(const orte_process_name_t *proc, const char *key);
+
+/*
+ * the standard module data structure
+ */
+struct orte_db_base_module_1_0_0_t {
+    orte_db_base_module_init_fn_t           init;
+    orte_db_base_module_finalize_fn_t       finalize;
+    orte_db_base_module_store_fn_t          store;
+    orte_db_base_module_fetch_fn_t          fetch;
+    orte_db_base_module_remove_fn_t         remove;
+};
+typedef struct orte_db_base_module_1_0_0_t orte_db_base_module_1_0_0_t;
+typedef struct orte_db_base_module_1_0_0_t orte_db_base_module_t;
+
+/*
+ * the standard component data structure
+ */
+struct orte_db_base_component_1_0_0_t {
+    mca_base_component_t base_version;
+    mca_base_component_data_t base_data;
+};
+typedef struct orte_db_base_component_1_0_0_t orte_db_base_component_1_0_0_t;
+typedef struct orte_db_base_component_1_0_0_t orte_db_base_component_t;
+
+/*
+ * Macro for use in components that are of type db
+ */
+#define ORTE_DB_BASE_VERSION_1_0_0 \
+  MCA_BASE_VERSION_2_0_0, \
+  "db", 1, 0, 0
+
+/* Global structure for accessing DB functions */
+ORTE_DECLSPEC extern orte_db_base_module_t orte_db;  /* holds selected module's function pointers */
+
+END_C_DECLS
+
+#endif

orte/mca/db/dbase/Makefile.am

@@ -0,0 +1,38 @@
+#
+# Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+sources = \
+        db_dbase.h \
+        db_dbase_component.c \
+        db_dbase.c
+
+# Make the output library in this directory, and name it either
+# mca_<type>_<name>.la (for DSO builds) or libmca_<type>_<name>.la
+# (for static builds).
+
+if MCA_BUILD_orte_db_dbase_DSO
+component_noinst =
+component_install = mca_db_dbase.la
+else
+component_noinst = libmca_db_dbase.la
+component_install =
+endif
+
+mcacomponentdir = $(pkglibdir)
+mcacomponent_LTLIBRARIES = $(component_install)
+mca_db_dbase_la_CPPFLAGS = $(db_dbase_CPPFLAGS)
+mca_db_dbase_la_SOURCES = $(sources)
+mca_db_dbase_la_LDFLAGS = -module -avoid-version $(db_dbase_LDFLAGS)
+mca_db_dbase_la_LIBADD = $(db_dbase_LIBS)
+
+noinst_LTLIBRARIES = $(component_noinst)
+libmca_db_dbase_la_CPPFLAGS = $(db_dbase_CPPFLAGS)
+libmca_db_dbase_la_SOURCES =$(sources)
+libmca_db_dbase_la_LDFLAGS = -module -avoid-version $(db_dbase_LDFLAGS)
+libmca_db_dbase_la_LIBADD = $(db_dbase_LIBS)

orte/mca/db/dbase/configure.m4

@@ -0,0 +1,33 @@
+dnl -*- shell-script -*-
+dnl
+dnl Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+dnl Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+dnl $COPYRIGHT$
+dnl 
+dnl Additional copyrights may follow
+dnl 
+dnl $HEADER$
+dnl
+
+# MCA_db_dbase_CONFIG([action-if-found], [action-if-not-found])
+# -----------------------------------------------------------
+AC_DEFUN([MCA_orte_db_dbase_CONFIG], [
+    AC_CONFIG_FILES([orte/mca/db/dbase/Makefile])
+
+    # do not build if rte is disabled
+    AS_IF([test "$orte_without_full_support" = 0],
+          [OMPI_CHECK_PACKAGE([db_db],
+                              [db.h],
+                              [db],
+                              [dbopen],
+                              [],
+                              [],
+                              [],
+                              [$1],
+                              [$2])],
+          [$2])
+
+    AC_SUBST(db_dbase_CPPFLAGS)
+    AC_SUBST(db_dbase_LDFLAGS)
+    AC_SUBST(db_dbase_LIBS)
+])dnl

orte/mca/db/dbase/db_dbase.c

@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ *
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include <string.h>
+#include <sys/types.h>
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#include <stdio.h>
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <db.h>
+
+#include "opal/dss/dss_types.h"
+#include "opal/util/os_dirpath.h"
+#include "opal/util/os_path.h"
+#include "opal/util/output.h"
+#include "opal/util/malloc.h"
+#include "opal/util/basename.h"
+#include "opal/mca/pstat/base/base.h"
+#include "opal/mca/paffinity/base/base.h"
+#include "opal/mca/sysinfo/base/base.h"
+
+#include "orte/util/show_help.h"
+#include "orte/mca/errmgr/base/base.h"
+#include "orte/runtime/orte_globals.h"
+
+#include "db_dbase.h"
+
+static int init(void);
+static int finalize(void);
+static int store(orte_process_name_t *proc, char *key, void *object, size_t size);
+static int fetch(orte_process_name_t *proc,
+                 char *key, void **object, size_t *size);
+static int delete_data(orte_process_name_t *proc,char *key);
+
+orte_db_base_module_t orte_db_dbase_module = {
+    init,
+    finalize,
+    store,
+    fetch,
+    delete_data
+};
+
+/* local variables */
+static DB *save_dbase=NULL, *recover_dbase=NULL;
+
+static int init(void)
+{
+    char *path, *name;
+    
+    /* setup the database */
+    if (ORTE_SUCCESS != opal_os_dirpath_create(orte_db_dbase_directory, S_IRWXU)) {
+        orte_show_help("help-db-dbase.txt", "cannot-create-dir", true,
+                       orte_db_dbase_directory);
+        return ORTE_ERR_FILE_OPEN_FAILURE;
+    }
+    orte_util_convert_process_name_to_string(&name, ORTE_PROC_MY_NAME);
+    path = opal_os_path(false, orte_db_dbase_directory, name, NULL);
+    free(name);
+    if (NULL == (save_dbase = dbaseopen(path, O_CREAT | O_RDWR | O_TRUNC, S_IRWXU, DB_HASH, NULL))) {
+        orte_show_help("help-db-dbase.txt", "cannot-create-dbase", true, path);
+        free(path);
+        return ORTE_ERR_FILE_OPEN_FAILURE;
+    }
+    free(path);
+    
+    return ORTE_SUCCESS;
+}
+
+static int finalize(void)
+{
+    /* if we are normally terminating, remove the recovery file */
+    
+    return ORTE_SUCCESS;
+}
+
+static int store(orte_process_name_t *proc, char *key, void *object, size_t size)
+{
+    DBT key, data;
+    opal_buffer_t buf;
+    orte_job_t *jdata;
+    orte_proc_t *proc;
+    int rc=ORTE_SUCCESS, size;
+    
+    /* construct the buffer we will use for packing the data */
+    OBJ_CONSTRUCT(&buf, opal_buffer_t);
+    key.data = inkey;
+    key.size = strlen(key.data);
+    
+    switch (type) {
+        case ORTE_JOB:
+            jdata = (orte_job_t*)object;
+            opal_dss.pack(&buf, &jdata, 1, ORTE_JOB);
+            break;
+        case ORTE_PROC:
+            proc = (orte_proc_t*)object;
+            opal_dss.pack(&buf, &proc, 1, ORTE_PROC);
+            break;
+        default:
+            orte_show_help("help-db-dbase.txt", "unrecognized-type", true, type);
+            rc = ORTE_ERR_BAD_PARAM;
+            goto cleanup;
+            break;
+    }
+    
+    /* unload the data */
+    opal_dss.unload(&buf, (void**)&data.data, &size);
+    data.size = size;
+    OBJ_DESTRUCT(&buf);
+    
+    /* put the info into the dbase */
+    if (0 > save_dbase->put(save_dbase, &key, &data, 0)) {
+        orte_show_help("help-db-dbase.txt", "error-writing-dbase", true, (char*)key.data, strerror(errno));
+        rc = ORTE_ERR_FILE_WRITE_FAILURE;
+    }
+    /* sync it to force it to disk */
+    if (0 > save_dbase->sync(save_dbase, 0)) {
+        orte_show_help("help-db-dbase.txt", "error-syncing-dbase", true, (char*)key.data, strerror(errno));
+        rc = ORTE_ERR_FILE_WRITE_FAILURE;
+    }
+    
+cleanup:
+    /* cleanup */
+    if (NULL != key.data) {
+        free(key.data);
+    }
+    if (NULL != data.data) {
+        free(data.data);
+    }
+    return rc;
+}
+
+static int fetch(orte_process_name_t *proc,
+                 char *key, void **object, size_t *size)
+{
+    DBT key, data;
+    opal_buffer_t buf;
+    orte_job_t *jdata;
+    orte_proc_t *proc;
+    int rc=ORTE_SUCCESS;
+    int32_t n;
+    
+    if (NULL == recover_dbase) {
+        orte_show_help("help-db-dbase.txt", "recover-source-undef", true);
+        rc = ORTE_ERR_NOT_FOUND;
+    }
+    
+    /* construct the buffer we will use for unpacking the data */
+    OBJ_CONSTRUCT(&buf, opal_buffer_t);
+    key.data = inkey;
+    key.size = strlen(key.data);
+    
+    /* get the specified data */
+    if (0 > recover_dbase->get(recover_dbase, &key, &data, 0)) {
+        orte_show_help("help-db-dbase.txt", "error-reading-dbase", true, (char*)key.data, strerror(errno));
+        rc = ORTE_ERR_FILE_READ_FAILURE;
+        goto cleanup;
+    }
+    
+    /* populate the recovered info */
+    opal_dss.load(&buf, data.data, data.size);
+    switch (type) {
+        case ORTE_JOB:
+            n=1;
+            opal_dss.unpack(&buf, &jdata, &n, ORTE_JOB);
+            break;
+        case ORTE_PROC:
+            n=1;
+            opal_dss.unpack(&buf, &proc, &n, ORTE_PROC);
+            break;
+        default:
+            break;
+    }
+    
+cleanup:
+    OBJ_DESTRUCT(&buf);
+    return rc;
+}
+
+static int update(char *key, void *object, opal_data_type_t type)
+{
+    return ORTE_ERR_NOT_IMPLEMENTED;
+}
+
+static int delete_data(char *key)
+{
+    return ORTE_ERR_NOT_IMPLEMENTED;
+}

orte/mca/db/dbase/db_dbase.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+
+#ifndef ORTE_DB_DBASE_H
+#define ORTE_DB_DBASE_H
+
+#include "orte/mca/db/db.h"
+
+BEGIN_C_DECLS
+
+/*
+ * Module open / close
+ */
+int orte_db_dbase_component_open(void);
+int orte_db_dbase_component_close(void);
+int orte_db_dbase_component_query(mca_base_module_t **module, int *priority);
+
+
+ORTE_MODULE_DECLSPEC extern orte_db_base_component_t mca_db_dbase_component;
+ORTE_DECLSPEC extern orte_db_base_module_t orte_db_dbase_module;
+extern char *orte_db_dbase_directory;
+
+END_C_DECLS
+
+#endif /* ORTE_DB_DBASE_H */

orte/mca/db/dbase/db_dbase_component.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ *
+ * These symbols are in a file by themselves to provide nice linker
+ * semantics.  Since linkers generally pull in symbols by object
+ * files, keeping these symbols as the only symbols in this file
+ * prevents utility programs such as "ompi_info" from having to import
+ * entire components just to query their version and parameters.
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include "opal/mca/base/base.h"
+#include "opal/mca/base/mca_base_param.h"
+
+#include "orte/util/proc_info.h"
+
+#include "orte/mca/db/db.h"
+#include "orte/mca/db/base/base.h"
+#include "db_dbase.h"
+
+extern orte_db_base_module_t orte_db_dbase_module;
+char *orte_db_dbase_directory;
+
+/*
+ * Instantiate the public struct with all of our public information
+ * and pointers to our public functions in it
+ */
+orte_db_base_component_t mca_db_dbase_component = {
+    {
+        ORTE_DB_BASE_VERSION_1_0_0,
+
+        /* Component name and version */
+        "dbase",
+        ORTE_MAJOR_VERSION,
+        ORTE_MINOR_VERSION,
+        ORTE_RELEASE_VERSION,
+
+        /* Component open and close functions */
+        orte_db_dbase_component_open,
+        orte_db_dbase_component_close,
+        orte_db_dbase_component_query
+    },
+    {
+        /* The component is checkpoint ready */
+        MCA_BASE_METADATA_PARAM_CHECKPOINT
+    }
+};
+
+
+int
+orte_db_dbase_component_open(void)
+{
+    return ORTE_SUCCESS;
+}
+
+
+int orte_db_dbase_component_query(mca_base_module_t **module, int *priority)
+{
+
+    /* we are the file module - we need to be selected
+     * IFF we are requested
+     */
+    bool is_required = false;
+    mca_base_component_t *c = &mca_db_dbase_component.base_version;
+
+    /* retrieve the name of the file to be used */
+    mca_base_param_reg_string(c, "dir",
+                              "Name of directory to be used for storing and recovering db information",
+                              false, false, NULL, &orte_db_dbase_directory);
+    
+    mca_base_is_component_required(&orte_db_base_components_available,
+                                   &mca_db_dbase_component.base_version,
+                                   true,
+                                   &is_required);
+    
+    if (is_required && NULL != orte_db_dbase_directory) {
+        *priority = 1000;
+        *module = (mca_base_module_t*)&orte_db_dbase_module;
+        return ORTE_SUCCESS;
+    }
+    
+    
+    *priority = 0;
+    *module = NULL;
+    return ORTE_ERROR;
+}
+
+
+int
+orte_db_dbase_component_close(void)
+{
+    return ORTE_SUCCESS;
+}
+

orte/mca/db/dbm/Makefile.am

@@ -0,0 +1,38 @@
+#
+# Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+sources = \
+        db_dbm.h \
+        db_dbm_component.c \
+        db_dbm.c
+
+# Make the output library in this directory, and name it either
+# mca_<type>_<name>.la (for DSO builds) or libmca_<type>_<name>.la
+# (for static builds).
+
+if MCA_BUILD_orte_db_dbm_DSO
+component_noinst =
+component_install = mca_db_dbm.la
+else
+component_noinst = libmca_db_dbm.la
+component_install =
+endif
+
+mcacomponentdir = $(pkglibdir)
+mcacomponent_LTLIBRARIES = $(component_install)
+mca_db_dbm_la_CPPFLAGS = $(db_dbm_CPPFLAGS)
+mca_db_dbm_la_SOURCES = $(sources)
+mca_db_dbm_la_LDFLAGS = -module -avoid-version $(db_dbm_LDFLAGS)
+mca_db_dbm_la_LIBADD = $(db_dbm_LIBS)
+
+noinst_LTLIBRARIES = $(component_noinst)
+libmca_db_dbm_la_CPPFLAGS = $(db_dbm_CPPFLAGS)
+libmca_db_dbm_la_SOURCES =$(sources)
+libmca_db_dbm_la_LDFLAGS = -module -avoid-version $(db_dbm_LDFLAGS)
+libmca_db_dbm_la_LIBADD = $(db_dbm_LIBS)

orte/mca/db/dbm/configure.m4

@@ -0,0 +1,33 @@
+dnl -*- shell-script -*-
+dnl
+dnl Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+dnl Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+dnl $COPYRIGHT$
+dnl 
+dnl Additional copyrights may follow
+dnl 
+dnl $HEADER$
+dnl
+
+# MCA_db_dbm_CONFIG([action-if-found], [action-if-not-found])
+# -----------------------------------------------------------
+AC_DEFUN([MCA_orte_db_dbm_CONFIG], [
+    AC_CONFIG_FILES([orte/mca/db/dbm/Makefile])
+
+    # do not build if rte is disabled
+    AS_IF([test "$orte_without_full_support" = 0],
+          [OMPI_CHECK_PACKAGE([db_dbm],
+                              [ndbm.h],
+                              [dbm],
+                              [dbm_open],
+                              [],
+                              [],
+                              [],
+                              [$1],
+                              [$2])],
+          [$2])
+
+    AC_SUBST(db_dbm_CPPFLAGS)
+    AC_SUBST(db_dbm_LDFLAGS)
+    AC_SUBST(db_dbm_LIBS)
+])dnl

orte/mca/db/dbm/db_dbm.c

@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ *
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include <string.h>
+#include <sys/types.h>
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#include <stdio.h>
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <ndbm.h>
+
+#include "opal/dss/dss_types.h"
+#include "opal/util/os_dirpath.h"
+#include "opal/util/os_path.h"
+#include "opal/util/output.h"
+#include "opal/util/malloc.h"
+#include "opal/util/basename.h"
+#include "opal/mca/pstat/base/base.h"
+#include "opal/mca/paffinity/base/base.h"
+
+#include "orte/util/show_help.h"
+#include "orte/mca/errmgr/base/base.h"
+#include "orte/runtime/orte_globals.h"
+
+#include "db_dbm.h"
+
+static int init(void);
+static int finalize(void);
+static int insert(char *key, void *object, opal_data_type_t type);
+static int set_recover_source(orte_process_name_t *name);
+static int select_data(char *key, void *object, opal_data_type_t type);
+static int update(char *key, void *object, opal_data_type_t type);
+static int delete_data(char *key);
+
+orte_db_base_module_t orte_db_dbm_module = {
+    init,
+    finalize,
+    insert,
+    set_recover_source,
+    select_data,
+    update,
+    delete_data
+};
+
+/* local variables */
+static DBM *save_dbm=NULL, *recover_dbm=NULL;
+
+static int init(void)
+{
+    char *path, *name;
+    
+    /* setup the database */
+    if (ORTE_SUCCESS != opal_os_dirpath_create(orte_db_dbm_directory, S_IRWXU)) {
+        orte_show_help("help-db-dbm.txt", "cannot-create-dir", true,
+                       orte_db_dbm_directory);
+        return ORTE_ERR_FILE_OPEN_FAILURE;
+    }
+    orte_util_convert_process_name_to_string(&name, ORTE_PROC_MY_NAME);
+    path = opal_os_path(false, orte_db_dbm_directory, name, NULL);
+    free(name);
+    if (NULL == (save_dbm = dbm_open(path, O_CREAT | O_RDWR | O_TRUNC, S_IRWXU))) {
+        orte_show_help("help-db-dbm.txt", "cannot-create-dbm", true, path);
+        free(path);
+        return ORTE_ERR_FILE_OPEN_FAILURE;
+    }
+    free(path);
+    
+    return ORTE_SUCCESS;
+}
+
+static int finalize(void)
+{
+    /* if we are normally terminating, remove the recovery file */
+    
+    return ORTE_SUCCESS;
+}
+
+static int insert(char *inkey, void *object, opal_data_type_t type)
+{
+    datum key, data;
+    opal_buffer_t buf;
+    orte_job_t *jdata;
+    orte_proc_t *proc;
+    int rc=ORTE_SUCCESS, size;
+    
+    /* construct the buffer we will use for packing the data */
+    OBJ_CONSTRUCT(&buf, opal_buffer_t);
+    key.dptr = inkey;
+    key.dsize = strlen(key.dptr);
+    data.dptr = NULL;
+    
+    switch (type) {
+        case ORTE_JOB:
+            jdata = (orte_job_t*)object;
+            opal_dss.pack(&buf, &jdata, 1, ORTE_JOB);
+            break;
+        case ORTE_PROC:
+            proc = (orte_proc_t*)object;
+            opal_dss.pack(&buf, &proc, 1, ORTE_PROC);
+            break;
+        default:
+            orte_show_help("help-db-db.txt", "unrecognized-type", true, type);
+            rc = ORTE_ERR_BAD_PARAM;
+            goto cleanup;
+            break;
+    }
+    
+    /* unload the data */
+    opal_dss.unload(&buf, (void**)&data.dptr, &size);
+    data.dsize = size;
+    OBJ_DESTRUCT(&buf);
+    
+    /* put the info into the dbm */
+    if (0 > dbm_store(save_dbm, key, data, DBM_REPLACE)) {
+        orte_show_help("help-db-dbm.txt", "error-writing-dbm", true, (char*)key.dptr, strerror(errno));
+        rc = ORTE_ERR_FILE_WRITE_FAILURE;
+    }
+    
+cleanup:
+    /* cleanup */
+    if (NULL != key.dptr) {
+        free(key.dptr);
+    }
+    if (NULL != data.dptr) {
+        free(data.dptr);
+    }
+    return rc;
+}
+
+static int set_recover_source(orte_process_name_t *name)
+{
+    char *path, *pname;
+    int rc=ORTE_SUCCESS;
+    
+    /* setup the database */
+    orte_util_convert_process_name_to_string(&pname, name);
+    path = opal_os_path(false, orte_db_dbm_directory, pname, NULL);
+    free(pname);
+    if (NULL == (recover_dbm = dbm_open(path, O_RDONLY, S_IRWXU))) {
+        orte_show_help("help-db-dbm.txt", "cannot-open-dbm", true, path);
+        free(path);
+        return ORTE_ERR_FILE_OPEN_FAILURE;
+    }
+    free(path);
+    
+    return rc;
+}
+
+static int select_data(char *inkey, void *object, opal_data_type_t type)
+{
+    datum key, data;
+    opal_buffer_t buf;
+    orte_job_t *jdata;
+    orte_proc_t *proc;
+    int rc=ORTE_SUCCESS;
+    int32_t n;
+    
+    if (NULL == recover_dbm) {
+        orte_show_help("help-db-dbm.txt", "recover-source-undef", true);
+        rc = ORTE_ERR_NOT_FOUND;
+    }
+    
+    /* construct the buffer we will use for unpacking the data */
+    OBJ_CONSTRUCT(&buf, opal_buffer_t);
+    key.dptr = inkey;
+    key.dsize = strlen(key.dptr);
+    data.dptr = NULL;
+    
+    /* get the specified data */
+    data = dbm_fetch(recover_dbm, key);
+    if (NULL == data.dptr) {
+        orte_show_help("help-db-dbm.txt", "error-reading-dbm", true, (char*)key.dptr, strerror(errno));
+        rc = ORTE_ERR_FILE_READ_FAILURE;
+        goto cleanup;
+    }
+    
+    /* populate the recovered info */
+    opal_dss.load(&buf, data.dptr, data.dsize);
+    switch (type) {
+        case ORTE_JOB:
+            n=1;
+            opal_dss.unpack(&buf, &jdata, &n, ORTE_JOB);
+            break;
+        case ORTE_PROC:
+            n=1;
+            opal_dss.unpack(&buf, &proc, &n, ORTE_PROC);
+            break;
+        default:
+            break;
+    }
+    
+cleanup:
+    OBJ_DESTRUCT(&buf);
+    return rc;
+}
+
+static int update(char *key, void *object, opal_data_type_t type)
+{
+    return ORTE_ERR_NOT_IMPLEMENTED;
+}
+
+static int delete_data(char *key)
+{
+    return ORTE_ERR_NOT_IMPLEMENTED;
+}

orte/mca/db/dbm/db_dbm.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+
+#ifndef ORTE_DB_DBM_H
+#define ORTE_DB_DBM_H
+
+#include "orte/mca/db/db.h"
+
+BEGIN_C_DECLS
+
+/*
+ * Module open / close
+ */
+int orte_db_dbm_component_open(void);
+int orte_db_dbm_component_close(void);
+int orte_db_dbm_component_query(mca_base_module_t **module, int *priority);
+
+
+ORTE_MODULE_DECLSPEC extern orte_db_base_component_t mca_db_dbm_component;
+ORTE_DECLSPEC extern orte_db_base_module_t orte_db_dbm_module;
+extern char *orte_db_dbm_directory;
+
+END_C_DECLS
+
+#endif /* ORTE_DB_DBM_H */

orte/mca/db/dbm/db_dbm_component.c

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ *
+ * These symbols are in a file by themselves to provide nice linker
+ * semantics.  Since linkers generally pull in symbols by object
+ * files, keeping these symbols as the only symbols in this file
+ * prevents utility programs such as "ompi_info" from having to import
+ * entire components just to query their version and parameters.
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include "opal/mca/base/base.h"
+#include "opal/mca/base/mca_base_param.h"
+
+#include "orte/util/proc_info.h"
+
+#include "orte/mca/db/db.h"
+#include "orte/mca/db/base/base.h"
+#include "db_dbm.h"
+
+extern orte_db_base_module_t orte_db_dbm_module;
+char *orte_db_dbm_directory;
+
+/*
+ * Instantiate the public struct with all of our public information
+ * and pointers to our public functions in it
+ */
+orte_db_base_component_t mca_db_dbm_component = {
+    {
+        ORTE_DB_BASE_VERSION_1_0_0,
+
+        /* Component name and version */
+        "dbm",
+        ORTE_MAJOR_VERSION,
+        ORTE_MINOR_VERSION,
+        ORTE_RELEASE_VERSION,
+
+        /* Component open and close functions */
+        orte_db_dbm_component_open,
+        orte_db_dbm_component_close,
+        orte_db_dbm_component_query
+    },
+    {
+        /* The component is checkpoint ready */
+        MCA_BASE_METADATA_PARAM_CHECKPOINT
+    }
+};
+
+
+int
+orte_db_dbm_component_open(void)
+{
+    return ORTE_SUCCESS;
+}
+
+
+int orte_db_dbm_component_query(mca_base_module_t **module, int *priority)
+{
+    mca_base_component_t *c = &mca_db_dbm_component.base_version;
+
+    /* retrieve the name of the file to be used */
+    mca_base_param_reg_string(c, "dir",
+                              "Name of directory to be used for storing and recovering db information",
+                              false, false, NULL, &orte_db_dbm_directory);
+    
+    if (NULL != orte_db_dbm_directory) {
+        *priority = 50;
+        *module = (mca_base_module_t*)&orte_db_dbm_module;
+        return ORTE_SUCCESS;
+    }
+    
+    
+    *priority = 0;
+    *module = NULL;
+    return ORTE_ERROR;
+}
+
+
+int
+orte_db_dbm_component_close(void)
+{
+    return ORTE_SUCCESS;
+}
+

orte/mca/db/hash/Makefile.am

@@ -0,0 +1,36 @@
+#
+# Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+# Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+sources = \
+        db_hash.h \
+        db_hash_component.c \
+        db_hash.c
+
+# Make the output library in this directory, and name it either
+# mca_<type>_<name>.la (for DSO builds) or libmca_<type>_<name>.la
+# (for static builds).
+
+if MCA_BUILD_orte_db_hash_DSO
+component_noinst =
+component_install = mca_db_hash.la
+else
+component_noinst = libmca_db_hash.la
+component_install =
+endif
+
+mcacomponentdir = $(pkglibdir)
+mcacomponent_LTLIBRARIES = $(component_install)
+mca_db_hash_la_SOURCES = $(sources)
+mca_db_hash_la_LDFLAGS = -module -avoid-version
+mca_db_hash_la_LIBADD = $(db_hash_LIBS)
+
+noinst_LTLIBRARIES = $(component_noinst)
+libmca_db_hash_la_SOURCES =$(sources)
+libmca_db_hash_la_LDFLAGS = -module -avoid-version

orte/mca/db/hash/configure.m4

@@ -0,0 +1,21 @@
+# -*- shell-script -*-
+#
+# Copyright (c) 2010      Cisco Systems, Inc. All rights reserved.
+# Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+
+# MCA_db_hash_CONFIG([action-if-found], [action-if-not-found])
+# -----------------------------------------------------------
+AC_DEFUN([MCA_orte_db_hash_CONFIG], [
+    AC_CONFIG_FILES([orte/mca/db/hash/Makefile])
+
+    # do not build if rte is disabled
+    AS_IF([test "$orte_without_full_support" = 0],
+          [$1],
+          [$2])
+])dnl

orte/mca/db/hash/db_hash.c

@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2004-2011 The University of Tennessee and The University
+ *                         of Tennessee Research Foundation.  All rights
+ *                         reserved.
+ * Copyright (c) 2011-2012 Los Alamos National Security, LLC.  All rights
+ *                         reserved. 
+  * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ *
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include <time.h>
+
+#include "opal/class/opal_hash_table.h"
+#include "opal/class/opal_pointer_array.h"
+#include "opal/dss/dss_types.h"
+#include "opal/util/output.h"
+
+#include "orte/util/show_help.h"
+#include "orte/util/name_fns.h"
+#include "orte/mca/errmgr/errmgr.h"
+#include "orte/runtime/orte_globals.h"
+#include "orte/runtime/orte_wait.h"
+
+#include "orte/mca/db/base/base.h"
+#include "db_hash.h"
+
+static int init(void);
+static void finalize(void);
+static int store(const orte_process_name_t *proc,
+                 const char *key, const void *object, size_t size);
+static int fetch(const orte_process_name_t *proc,
+                 const char *key,
+                 opal_list_t *values);
+static int remove_data(const orte_process_name_t *proc, const char *key);
+
+orte_db_base_module_t orte_db_hash_module = {
+    init,
+    finalize,
+    store,
+    fetch,
+    remove_data
+};
+
+/* Local "globals" */
+static opal_pointer_array_t job_data;
+
+/**
+ * Data for a particular orte process
+ * The name association is maintained in the
+ * proc_data hash table.
+ */
+typedef struct {
+    /** Structure can be put on lists (including in hash tables) */
+    opal_list_item_t super;
+    /* List of local_data_t structures containing all data
+       received from this process, sorted by key. */
+    opal_list_t data;
+} proc_data_t;
+
+static void proc_data_construct(proc_data_t *ptr)
+{
+    OBJ_CONSTRUCT(&ptr->data, opal_list_t);
+}
+
+static void proc_data_destruct(proc_data_t *ptr)
+{
+    opal_list_item_t *item;
+
+    while (NULL != (item = opal_list_remove_first(&ptr->data))) {
+        OBJ_RELEASE(item);
+    }
+    OBJ_DESTRUCT(&ptr->data);
+}
+OBJ_CLASS_INSTANCE(proc_data_t, opal_list_item_t,
+                   proc_data_construct, proc_data_destruct);
+
+ 
+/* Data for a given job
+ */
+typedef struct {
+    opal_object_t super;
+    orte_jobid_t jobid;
+    opal_hash_table_t *data;
+} job_data_t;
+
+static void jobdata_constructor(job_data_t *ptr)
+{
+    ptr->jobid = ORTE_JOBID_INVALID;
+    ptr->data = OBJ_NEW(opal_hash_table_t);    
+    opal_hash_table_init(ptr->data, 256);
+}
+static void jobdata_destructor(job_data_t *ptr)
+{
+    opal_hash_table_remove_all(ptr->data);
+    OBJ_RELEASE(ptr->data);
+}
+OBJ_CLASS_INSTANCE(job_data_t,
+                   opal_object_t,
+                   jobdata_constructor,
+                   jobdata_destructor);
+
+
+static int init(void)
+{
+    OBJ_CONSTRUCT(&job_data, opal_pointer_array_t);
+    opal_pointer_array_init(&job_data, 1, INT_MAX, 1);
+    return ORTE_SUCCESS;
+}
+
+static void finalize(void)
+{
+    int i;
+    job_data_t *jtable;
+
+    for (i=0; i < job_data.size; i++) {
+        if (NULL == (jtable = (job_data_t*)opal_pointer_array_get_item(&job_data, i))) {
+            continue;
+        }
+        OBJ_RELEASE(jtable);
+    }
+    OBJ_DESTRUCT(&job_data);
+}
+
+
+
+/**
+ * Find data for a given key in a given proc_data_t
+ * container.
+ */
+static orte_db_keyval_t* lookup_keyval(proc_data_t *proc_data,
+                                       const char *key)
+{
+    orte_db_keyval_t *kv = NULL;
+    for (kv = (orte_db_keyval_t *) opal_list_get_first(&proc_data->data);
+         kv != (orte_db_keyval_t *) opal_list_get_end(&proc_data->data);
+         kv = (orte_db_keyval_t *) opal_list_get_next(kv)) {
+        if (0 == strcmp(key, kv->key)) {
+            return kv;
+        }
+    }
+
+    return NULL;
+}
+
+
+/**
+* Find proc_data_t container associated with given
+ * orte_process_name_t.
+ */
+static proc_data_t* lookup_orte_proc(opal_hash_table_t *jtable, orte_vpid_t vpid)
+{
+    proc_data_t *proc_data = NULL;
+    
+    opal_hash_table_get_value_uint32(jtable, orte_util_hash_vpid(vpid), (void**)&proc_data);
+    if (NULL == proc_data) {
+        /* The proc clearly exists, so create a data structure for it */
+        proc_data = OBJ_NEW(proc_data_t);
+        if (NULL == proc_data) {
+            opal_output(0, "db:hash:lookup_orte_proc: unable to allocate proc_data_t\n");
+            return NULL;
+        }
+        opal_hash_table_set_value_uint32(jtable, orte_util_hash_vpid(vpid), proc_data);
+    }
+    
+    return proc_data;
+}
+
+static int store(const orte_process_name_t *proc,
+                 const char *key, const void *object, size_t size)
+{
+    int i;
+    job_data_t *jtable, *jtab;
+    proc_data_t *proc_data;
+    orte_db_keyval_t *kv;
+
+    OPAL_OUTPUT_VERBOSE((5, orte_db_base.output,
+                         "%s db:hash:store: storing key %s data size %lu for proc %s",
+                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
+                         key, (unsigned long)size, ORTE_NAME_PRINT(proc)));
+
+    /* get the job data object for this proc */
+    jtable = NULL;
+    for (i=0; i < job_data.size; i++) {
+        if (NULL == (jtab = (job_data_t*)opal_pointer_array_get_item(&job_data, i))) {
+            continue;
+        }
+        if (jtab->jobid == proc->jobid) {
+            jtable = jtab;
+            break;
+        }
+    }
+    if (NULL == jtable) {
+        /* need to add an entry for this job */
+        jtable = OBJ_NEW(job_data_t);
+        jtable->jobid = proc->jobid;
+        opal_pointer_array_add(&job_data, jtable);
+    }
+
+    /* lookup the proc data object for this proc */
+    if (NULL == (proc_data = lookup_orte_proc(jtable->data, proc->vpid))) {
+        /* unrecoverable error */
+        return ORTE_ERR_OUT_OF_RESOURCE;
+    }
+
+    /* see if we already have this key in the data - means we are updating
+     * a pre-existing value
+     */
+    if (NULL != (kv = lookup_keyval(proc_data, key))) {
+        /* release the old data */
+        if (NULL != kv->value.bytes) {
+            free(kv->value.bytes);
+        }
+    } else {
+        kv = OBJ_NEW(orte_db_keyval_t);
+        kv->key = strdup(key);
+        opal_list_append(&proc_data->data, &kv->super);
+    }
+    kv->value.bytes = (uint8_t*)malloc(size);
+    memcpy(kv->value.bytes, object, size);
+    kv->value.size = size;
+
+    return ORTE_SUCCESS;
+}
+
+static int fetch(const orte_process_name_t *proc,
+                 const char *key,
+                 opal_list_t *values)
+{
+    int i;
+    job_data_t *jtable, *jtab;
+    proc_data_t *proc_data;
+    orte_db_keyval_t *kv, *ans;
+
+    OPAL_OUTPUT_VERBOSE((5, orte_db_base.output,
+                         "%s db:hash:fetch: searching for key %s on proc %s",
+                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
+                         (NULL == key) ? "NULL" : key, ORTE_NAME_PRINT(proc)));
+
+    /* get the job data object for this proc */
+    jtable = NULL;
+    for (i=0; i < job_data.size; i++) {
+        if (NULL == (jtab = (job_data_t*)opal_pointer_array_get_item(&job_data, i))) {
+            continue;
+        }
+        if (jtab->jobid == proc->jobid) {
+            jtable = jtab;
+            break;
+        }
+    }
+    if (NULL == jtable) {
+        /* eventually, we will fetch this data - but for now, this
+         * is simply an error
+         */
+        return ORTE_ERR_NOT_FOUND;
+    }
+
+    /* lookup the proc data object for this proc */
+    if (NULL == (proc_data = lookup_orte_proc(jtable->data, proc->vpid))) {
+        /* unrecoverable error */
+        return ORTE_ERR_OUT_OF_RESOURCE;
+    }
+
+    /* if the key is NULL, then return all data for this proc */
+    if (NULL == key) {
+        for (kv = (orte_db_keyval_t *) opal_list_get_first(&proc_data->data);
+             kv != (orte_db_keyval_t *) opal_list_get_end(&proc_data->data);
+             kv = (orte_db_keyval_t *) opal_list_get_next(kv)) {
+            ans = OBJ_NEW(orte_db_keyval_t);
+            ans->key = strdup(kv->key);
+            ans->value.bytes = malloc(kv->value.size);
+            memcpy(ans->value.bytes, kv->value.bytes, kv->value.size);
+            ans->value.size = kv->value.size;
+            opal_list_append(values, &ans->super);
+        }
+        return ORTE_SUCCESS;
+    }
+
+    /* find the value */
+    if (NULL == (kv = lookup_keyval(proc_data, key))) {
+        /* again, we eventually will attempt to fetch the data - for
+         * now, just report it as an error */
+        return ORTE_ERR_NOT_FOUND;
+    }
+
+    /* copy the data across */
+    ans = OBJ_NEW(orte_db_keyval_t);
+    ans->value.bytes = (uint8_t*)malloc(kv->value.size);
+    memcpy(ans->value.bytes, kv->value.bytes, kv->value.size);
+    ans->value.size = kv->value.size;
+    opal_list_append(values, &ans->super);
+
+    return ORTE_SUCCESS;
+}
+
+static int remove_data(const orte_process_name_t *proc, const char *key)
+{
+    int i, save_loc;
+    job_data_t *jtable, *jtab;
+    proc_data_t *proc_data;
+    orte_db_keyval_t *kv;
+
+    /* if proc is NULL, remove all data from the database */
+    if (NULL == proc) {
+        for (i=0; i < job_data.size; i++) {
+            if (NULL == (jtable = (job_data_t*)opal_pointer_array_get_item(&job_data, i))) {
+                continue;
+            }
+            OBJ_RELEASE(jtable);
+        }
+        /* leave the job pointer array itself as we may add data back */
+        return ORTE_SUCCESS;
+    }
+
+    /* lookup the specified jobid */
+    jtable = NULL;
+    for (i=0; i < job_data.size; i++) {
+        if (NULL == (jtab = (job_data_t*)opal_pointer_array_get_item(&job_data, i))) {
+            continue;
+        }
+        if (jtab->jobid == proc->jobid) {
+            jtable = jtab;
+            save_loc = i;
+            break;
+        }
+    }
+    if (NULL == jtable) {
+        /* don't have any data for this job */
+        return ORTE_SUCCESS;
+    }
+
+    /* if vpid is WILDCARD, remove all data for this job */
+    if (ORTE_VPID_WILDCARD == proc->vpid) {
+        opal_pointer_array_set_item(&job_data, save_loc, NULL);
+        OBJ_RELEASE(jtable);
+        return ORTE_SUCCESS;
+    }
+
+    /* lookup the specified proc */
+    if (NULL == (proc_data = lookup_orte_proc(jtable->data, proc->vpid))) {
+        /* no data for this proc */
+        return ORTE_SUCCESS;
+    }
+
+    /* if key is NULL, remove all data for this proc */
+    if (NULL == key) {
+        while (NULL != (kv = (orte_db_keyval_t *) opal_list_remove_first(&proc_data->data))) {
+            OBJ_RELEASE(kv);
+        }
+        /* remove the proc_data object itself from the jtable */
+        opal_hash_table_remove_value_uint32(jtable->data, orte_util_hash_vpid(proc->vpid));
+        /* cleanup */
+        OBJ_RELEASE(proc_data);
+        return ORTE_SUCCESS;
+    }
+
+    /* remove this item */
+    for (kv = (orte_db_keyval_t*) opal_list_get_first(&proc_data->data);
+         kv != (orte_db_keyval_t*) opal_list_get_end(&proc_data->data);
+         kv = (orte_db_keyval_t*) opal_list_get_next(kv)) {
+        if (0 == strcmp(key, kv->key)) {
+            OBJ_RELEASE(kv);
+            break;
+        }
+    }
+
+    return ORTE_SUCCESS;
+}
+

orte/mca/db/hash/db_hash.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ */
+
+#ifndef ORTE_DB_HASH_H
+#define ORTE_DB_HASH_H
+
+#include "orte/mca/db/db.h"
+
+BEGIN_C_DECLS
+
+
+ORTE_MODULE_DECLSPEC extern orte_db_base_component_t mca_db_hash_component;
+ORTE_DECLSPEC extern orte_db_base_module_t orte_db_hash_module;
+
+END_C_DECLS
+
+#endif /* ORTE_DB_HASH_H */

orte/mca/db/hash/db_hash_component.c

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2010      Cisco Systems, Inc.  All rights reserved. 
+ * Copyright (c) 2012      Los Alamos National Security, Inc. All rights reserved.
+ * $COPYRIGHT$
+ * 
+ * Additional copyrights may follow
+ * 
+ * $HEADER$
+ *
+ * These symbols are in a file by themselves to provide nice linker
+ * semantics.  Since linkers generally pull in symbols by object
+ * files, keeping these symbols as the only symbols in this file
+ * prevents utility programs such as "ompi_info" from having to import
+ * entire components just to query their version and parameters.
+ */
+
+#include "orte_config.h"
+#include "orte/constants.h"
+
+#include "opal/mca/base/base.h"
+
+#include "orte/mca/db/db.h"
+#include "orte/mca/db/base/base.h"
+#include "db_hash.h"
+
+static int db_hash_component_open(void);
+static int db_hash_component_query(mca_base_module_t **module, int *priority);
+static int db_hash_component_close(void);
+
+/*
+ * Instantiate the public struct with all of our public information
+ * and pointers to our public functions in it
+ */
+orte_db_base_component_t mca_db_hash_component = {
+    {
+        ORTE_DB_BASE_VERSION_1_0_0,
+
+        /* Component name and version */
+        "hash",
+        ORTE_MAJOR_VERSION,
+        ORTE_MINOR_VERSION,
+        ORTE_RELEASE_VERSION,
+
+        /* Component open and close functions */
+        db_hash_component_open,
+        db_hash_component_close,
+        db_hash_component_query
+    },
+    {
+        /* The component is checkpoint ready */
+        MCA_BASE_METADATA_PARAM_CHECKPOINT
+    }
+};
+
+
+static int db_hash_component_open(void)
+{
+    return ORTE_SUCCESS;
+}
+
+static int db_hash_component_query(mca_base_module_t **module, int *priority)
+{
+    /* this is the default module */    
+    *priority = 1;
+    *module = (mca_base_module_t*)&orte_db_hash_module;
+    return ORTE_SUCCESS;
+}
+
+
+static int db_hash_component_close(void)
+{
+    return ORTE_SUCCESS;
+}
+

orte/mca/ess/base/ess_base_std_app.c

@@ -10,7 +10,7 @@
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
  * Copyright (c) 2010-2012 Oak Ridge National Labs.  All rights reserved.
- * Copyright (c) 2011      Los Alamos National Security, LLC.  All rights
+ * Copyright (c) 2011-2012 Los Alamos National Security, LLC.  All rights
  *                         reserved. 
  * $COPYRIGHT$
  * 
@@ -41,6 +41,7 @@
 #include "orte/mca/rml/base/base.h"
 #include "orte/mca/routed/base/base.h"
 #include "orte/mca/errmgr/errmgr.h"
+#include "orte/mca/db/base/base.h"
 #include "orte/mca/grpcomm/base/base.h"
 #include "orte/mca/rml/rml.h"
 #include "orte/mca/odls/odls_types.h"
@@ -140,6 +141,18 @@ int orte_ess_base_app_setup(void)
         goto error;
     }
     
+    /* database */
+    if (ORTE_SUCCESS != (ret = orte_db_base_open())) {
+        ORTE_ERROR_LOG(ret);
+        error = "orte_db_base_open";
+        goto error;
+    }
+    if (ORTE_SUCCESS != (ret = orte_db_base_select())) {
+        ORTE_ERROR_LOG(ret);
+        error = "orte_db_base_select";
+        goto error;
+    }
+
     /*
      * Group communications
      */
@@ -302,6 +315,7 @@ int orte_ess_base_app_finalize(void)
 
     /* now can close the rml and its friendly group comm */
     orte_grpcomm_base_close();
+    orte_db_base_close();
     orte_routed_base_close();
     orte_rml_base_close();
     

orte/mca/ess/base/ess_base_std_orted.c

@@ -11,8 +11,8 @@
  *                         All rights reserved.
  * Copyright (c) 2009      Institut National de Recherche en Informatique
  *                         et Automatique. All rights reserved.
- * Copyright (c) 2011 Cisco Systems, Inc.  All rights reserved.
- * Copyright (c) 2011      Los Alamos National Security, LLC.  All rights
+ * Copyright (c) 2011      Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2011-2012 Los Alamos National Security, LLC.  All rights
  *                         reserved. 
  * $COPYRIGHT$
  * 
@@ -44,6 +44,7 @@
 #include "orte/mca/rml/base/base.h"
 #include "orte/mca/routed/base/base.h"
 #include "orte/mca/routed/routed.h"
+#include "orte/mca/db/base/base.h"
 #include "orte/mca/grpcomm/grpcomm.h"
 #include "orte/mca/grpcomm/base/base.h"
 #include "orte/mca/iof/base/base.h"
@@ -264,6 +265,18 @@ int orte_ess_base_orted_setup(char **hosts)
         goto error;
     }
     
+    /* database */
+    if (ORTE_SUCCESS != (ret = orte_db_base_open())) {
+        ORTE_ERROR_LOG(ret);
+        error = "orte_db_base_open";
+        goto error;
+    }
+    if (ORTE_SUCCESS != (ret = orte_db_base_select())) {
+        ORTE_ERROR_LOG(ret);
+        error = "orte_db_base_select";
+        goto error;
+    }
+
     /*
      * Group communications
      */

orte/mca/ess/hnp/ess_hnp_module.c

@@ -50,6 +50,7 @@
 #include "orte/mca/rml/rml_types.h"
 #include "orte/mca/routed/base/base.h"
 #include "orte/mca/routed/routed.h"
+#include "orte/mca/db/base/base.h"
 #include "orte/mca/errmgr/base/base.h"
 #include "orte/mca/grpcomm/base/base.h"
 #include "orte/mca/iof/base/base.h"
@@ -309,6 +310,18 @@ static int rte_init(void)
         goto error;
     }
     
+    /* database */
+    if (ORTE_SUCCESS != (ret = orte_db_base_open())) {
+        ORTE_ERROR_LOG(ret);
+        error = "orte_db_base_open";
+        goto error;
+    }
+    if (ORTE_SUCCESS != (ret = orte_db_base_select())) {
+        ORTE_ERROR_LOG(ret);
+        error = "orte_db_base_select";
+        goto error;
+    }
+
     /*
      * Group communications
      */

orte/mca/grpcomm/bad/grpcomm_bad_module.c

@@ -75,11 +75,6 @@ static int init(void)
 {
     int rc;
     
-    if (ORTE_SUCCESS != (rc = orte_grpcomm_base_modex_init())) {
-        ORTE_ERROR_LOG(rc);
-        return rc;
-    }
-    
     /* setup recvs */
     if (ORTE_SUCCESS != (rc = orte_grpcomm_base_comm_start())) {
         ORTE_ERROR_LOG(rc);
@@ -93,8 +88,6 @@ static int init(void)
  */
 static void finalize(void)
 {
-    orte_grpcomm_base_modex_finalize();
-
     /* cancel recv */
     orte_grpcomm_base_comm_stop();
 }

orte/mca/grpcomm/base/base.h

@@ -82,20 +82,16 @@ ORTE_DECLSPEC void orte_grpcomm_base_rollup_recv(int status, orte_process_name_t
 ORTE_DECLSPEC   int orte_grpcomm_base_set_proc_attr(const char *attr_name,
                                                     const void *data,
                                                     size_t size);
-ORTE_DECLSPEC   int orte_grpcomm_base_get_proc_attr(const orte_process_name_t proc,
-                                                    const char * attribute_name, void **val, 
+ORTE_DECLSPEC   int orte_grpcomm_base_get_proc_attr(const orte_process_name_t *proc,
+                                                    const char *attribute_name, void **val, 
                                                     size_t *size);
 ORTE_DECLSPEC   void orte_grpcomm_base_store_peer_modex(opal_buffer_t *rbuf, void *cbdata);
 ORTE_DECLSPEC   void orte_grpcomm_base_store_modex(opal_buffer_t *rbuf, void *cbdata);
 ORTE_DECLSPEC   int orte_grpcomm_base_modex(orte_grpcomm_collective_t *modex);
 ORTE_DECLSPEC   int orte_grpcomm_base_purge_proc_attrs(void);
-ORTE_DECLSPEC   int orte_grpcomm_base_modex_init(void);
-ORTE_DECLSPEC   void orte_grpcomm_base_modex_finalize(void);
 ORTE_DECLSPEC   int orte_grpcomm_base_pack_modex_entries(opal_buffer_t *buf);
 ORTE_DECLSPEC   int orte_grpcomm_base_update_modex_entries(orte_process_name_t *proc_name,
                                                            opal_buffer_t *rbuf);
-ORTE_DECLSPEC   int orte_grpcomm_base_load_modex_data(orte_process_name_t *proc, char *attribute_name,
-                                                      void *data, int num_bytes);
 
 /* comm support */
 ORTE_DECLSPEC int orte_grpcomm_base_comm_start(void);

orte/mca/grpcomm/base/grpcomm_base_modex.c

@@ -37,6 +37,7 @@
 #include "opal/mca/hwloc/base/base.h"
 
 #include "orte/util/proc_info.h"
+#include "orte/mca/db/db.h"
 #include "orte/mca/errmgr/errmgr.h"
 #include "orte/mca/ess/ess.h"
 #include "orte/runtime/orte_globals.h"
@@ -428,412 +429,19 @@ void orte_grpcomm_base_store_modex(opal_buffer_t *rbuf, void *cbdata)
     }
 }
 
-/**
- * MODEX DATABASE DESIGN
- *
- * Modex data is always associated with a given orte process name, in
- * an opal hash table. The hash table is necessary because modex data is
- * received for entire jobids and when working with
- * dynamic processes, it is possible we will receive data for a
- * process not yet in the ompi_proc_all() list of processes. This
- * information must be kept for later use, because if accept/connect
- * causes the proc to be added to the ompi_proc_all() list, it could
- * cause a connection storm.  Therefore, we use an
- * opal_hast_table_t backing store to contain all modex information.
- *
- * While we could add the now discovered proc into the ompi_proc_all()
- * list, this has some problems, in that we don't have the
- * architecture and hostname information needed to properly fill in
- * the ompi_proc_t structure and we don't want to cause RML
- * communication to get it when we don't really need to know anything
- * about the remote proc.
- *
- * All data put into the modex (or received from the modex) is
- * associated with a given proc,attr_name pair.  The data structures
- * to maintain this data look something like:
- *
- * opal_hash_table_t modex_data -> list of attr_proc_t objects
- * 
- * +-----------------------------+
- * | modex_proc_data_t           |
- * |  - opal_list_item_t         |
- * +-----------------------------+
- * | opal_mutex_t modex_lock     |
- * | bool modex_received_data    |     1
- * | opal_list_t modules         |     ---------+
- * +-----------------------------+              |
- *                                      *       |
- * +--------------------------------+  <--------+
- * | modex_module_data_t            |
- * |  - opal_list_item_t            |
- * +--------------------------------+
- * | mca_base_component_t component |
- * | void *module_data              |
- * | size_t module_data_size        |
- * +--------------------------------+
- *
- */
 
-/* Local "globals" */
-static orte_std_cntr_t num_entries;
-static opal_buffer_t *modex_buffer;
-static opal_hash_table_t *modex_data;
-static opal_mutex_t mutex;
-static opal_condition_t cond;
-
-/**
- * Modex data for a particular orte process
- *
- * Locking infrastructure and list of module data for a given orte
- * process name.  The name association is maintained in the
- * modex_data hash table.
- */
-struct modex_proc_data_t {
-    /** Structure can be put on lists (including in hash tables) */
-    opal_list_item_t super;
-    /* Lock held whenever the modex data for this proc is being
-       modified */
-    opal_mutex_t modex_lock;
-    /* True if modex data has ever been received from this process,
-       false otherwise. */
-    bool modex_received_data;
-    /* List of modex_module_data_t structures containing all data
-       received from this process, sorted by component name. */
-    opal_list_t modex_module_data;
-};
-typedef struct modex_proc_data_t modex_proc_data_t;
-
-static void
-modex_construct(modex_proc_data_t * modex)
-{
-    OBJ_CONSTRUCT(&modex->modex_lock, opal_mutex_t);
-    modex->modex_received_data = false;
-    OBJ_CONSTRUCT(&modex->modex_module_data, opal_list_t);
-}
-
-static void
-modex_destruct(modex_proc_data_t * modex)
-{
-    OBJ_DESTRUCT(&modex->modex_module_data);
-    OBJ_DESTRUCT(&modex->modex_lock);
-}
-
-OBJ_CLASS_INSTANCE(modex_proc_data_t, opal_object_t,
-                   modex_construct, modex_destruct);
-
-
-
-/**
- * Data for a particular attribute
- *
- * Container for data for a particular module,attribute pair.  This
- * structure should be contained in the modex_module_data list in an
- * modex_proc_data_t structure to maintain an association with a
- * given proc.  The list is then searched for a matching attribute
- * name.
- *
- * While searching the list or reading from (or writing to) this
- * structure, the lock in the proc_data_t should be held.
- */
-struct modex_attr_data_t {
-    /** Structure can be put on lists */
-    opal_list_item_t super;
-    /** Attribute name */
-    char * attr_name;
-    /** Binary blob of data associated with this proc,component pair */
-    void *attr_data;
-    /** Size (in bytes) of module_data */
-    size_t attr_data_size;
-};
-typedef struct modex_attr_data_t modex_attr_data_t;
-
-static void
-modex_attr_construct(modex_attr_data_t * module)
-{
-    module->attr_name = NULL;
-    module->attr_data = NULL;
-    module->attr_data_size = 0;
-}
-
-static void
-modex_attr_destruct(modex_attr_data_t * module)
-{
-    if (NULL != module->attr_name) {
-        free(module->attr_name);
-    }
-    if (NULL != module->attr_data) {
-        free(module->attr_data);
-    }
-}
-
-OBJ_CLASS_INSTANCE(modex_attr_data_t,
-                   opal_list_item_t,
-                   modex_attr_construct,
-                   modex_attr_destruct);
-
-
-/**
- * Find data for a given attribute in a given modex_proc_data_t
- * container.
- *
- * The proc_data's modex_lock must be held during this
- * search.
- */
-static modex_attr_data_t *
-modex_lookup_attr_data(modex_proc_data_t *proc_data,
-                       const char *attr_name,
-                       bool create_if_not_found)
-{
-    modex_attr_data_t *attr_data = NULL;
-    for (attr_data = (modex_attr_data_t *) opal_list_get_first(&proc_data->modex_module_data);
-         attr_data != (modex_attr_data_t *) opal_list_get_end(&proc_data->modex_module_data);
-         attr_data = (modex_attr_data_t *) opal_list_get_next(attr_data)) {
-        if (0 == strcmp(attr_name, attr_data->attr_name)) {
-            return attr_data;
-        }
-    }
-    
-    if (create_if_not_found) {
-        attr_data = OBJ_NEW(modex_attr_data_t);
-        if (NULL == attr_data) return NULL;
-        
-        attr_data->attr_name = strdup(attr_name);
-        opal_list_append(&proc_data->modex_module_data, &attr_data->super);
-        
-        return attr_data;
-    }
-    
-    return NULL;
-}
-
-
-/**
-* Find modex_proc_data_t container associated with given
- * orte_process_name_t.
- *
- * The global lock should *NOT* be held when
- * calling this function.
- */
-static modex_proc_data_t*
-modex_lookup_orte_proc(const orte_process_name_t *orte_proc)
-{
-    modex_proc_data_t *proc_data = NULL;
-    
-    OPAL_THREAD_LOCK(&mutex);
-    opal_hash_table_get_value_uint64(modex_data, 
-                    orte_util_hash_name(orte_proc), (void**)&proc_data);
-    if (NULL == proc_data) {
-        /* The proc clearly exists, so create a modex structure
-        for it */
-        proc_data = OBJ_NEW(modex_proc_data_t);
-        if (NULL == proc_data) {
-            opal_output(0, "grpcomm_basic_modex_lookup_orte_proc: unable to allocate modex_proc_data_t\n");
-            OPAL_THREAD_UNLOCK(&mutex);
-            return NULL;
-        }
-        opal_hash_table_set_value_uint64(modex_data, 
-                    orte_util_hash_name(orte_proc), proc_data);
-    }
-    OPAL_THREAD_UNLOCK(&mutex);
-    
-    return proc_data;
-}
-
-int orte_grpcomm_base_modex_init(void)
-{
-    OBJ_CONSTRUCT(&mutex, opal_mutex_t);
-    OBJ_CONSTRUCT(&cond, opal_condition_t);
-    
-    modex_data = OBJ_NEW(opal_hash_table_t);    
-    opal_hash_table_init(modex_data, 256);
-    num_entries = 0;
-    modex_buffer = OBJ_NEW(opal_buffer_t);
-    
-    return ORTE_SUCCESS;
-}
-
-void orte_grpcomm_base_modex_finalize(void)
-{
-    OBJ_DESTRUCT(&mutex);
-    OBJ_DESTRUCT(&cond);
-    
-    opal_hash_table_remove_all(modex_data);
-    OBJ_RELEASE(modex_data);
-    
-    OBJ_RELEASE(modex_buffer);
-}
-
-int orte_grpcomm_base_set_proc_attr(const char *attr_name,
-                                    const void *data,
-                                    size_t size)
-{
-    int rc;
-    
-    OPAL_THREAD_LOCK(&mutex);
-    
-    OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                         "%s grpcomm:set_proc_attr: setting attribute %s data size %lu",
-                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
-                         attr_name, (unsigned long)size));
-
-    /* Pack the attribute name information into the local buffer */
-    if (ORTE_SUCCESS != (rc = opal_dss.pack(modex_buffer, &attr_name, 1, OPAL_STRING))) {
-        ORTE_ERROR_LOG(rc);
-        goto cleanup;
-    }
-
-    /* pack the size */
-    if (ORTE_SUCCESS != (rc = opal_dss.pack(modex_buffer, &size, 1, OPAL_SIZE))) {
-        ORTE_ERROR_LOG(rc);
-        goto cleanup;
-    }
-    
-    /* Pack the actual data into the buffer */
-    if (0 != size) {
-        if (ORTE_SUCCESS != (rc = opal_dss.pack(modex_buffer, (void *) data, size, OPAL_BYTE))) {
-            ORTE_ERROR_LOG(rc);
-            goto cleanup;
-        }
-    }
-    
-    /* track the number of entries */
-    ++num_entries;
-    
-cleanup:
-    OPAL_THREAD_UNLOCK(&mutex);
-    
-    return rc;
-}
-
-int orte_grpcomm_base_get_proc_attr(const orte_process_name_t proc,
-                                    const char * attribute_name, void **val, 
-                                    size_t *size)
-{
-    modex_proc_data_t *proc_data;
-    modex_attr_data_t *attr_data;
-    
-    OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                         "%s grpcomm:get_proc_attr: searching for attr %s on proc %s",
-                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), attribute_name,
-                         ORTE_NAME_PRINT(&proc)));
-
-    proc_data = modex_lookup_orte_proc(&proc);
-    if (NULL == proc_data) {
-        OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                             "%s grpcomm:get_proc_attr: no modex entry for proc %s",
-                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
-                             ORTE_NAME_PRINT(&proc)));
-        return ORTE_ERR_NOT_FOUND;
-    }
-    
-    OPAL_THREAD_LOCK(&proc_data->modex_lock);
-    
-    /* look up attribute */
-    attr_data = modex_lookup_attr_data(proc_data, attribute_name, false);
-    
-    /* copy the data out to the user */
-    if ((NULL == attr_data) ||
-        (attr_data->attr_data_size == 0)) {
-        OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                             "%s grpcomm:get_proc_attr: no attr avail or zero byte size for proc %s attribute %s",
-                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
-                             ORTE_NAME_PRINT(&proc), attribute_name));
-        *val = NULL;
-        *size = 0;
-    } else {
-        void *copy = malloc(attr_data->attr_data_size);
-        
-        if (copy == NULL) {
-            OPAL_THREAD_UNLOCK(&proc_data->modex_lock);
-            return ORTE_ERR_OUT_OF_RESOURCE;
-        }
-        memcpy(copy, attr_data->attr_data, attr_data->attr_data_size);
-        *val = copy;
-        *size = attr_data->attr_data_size;
-        OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                             "%s grpcomm:get_proc_attr: found %d bytes for attr %s on proc %s",
-                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), (int)attr_data->attr_data_size,
-                             attribute_name, ORTE_NAME_PRINT(&proc)));
-        
-    }
-    OPAL_THREAD_UNLOCK(&proc_data->modex_lock);
-    
-    return ORTE_SUCCESS;
-} 
-
-
-int orte_grpcomm_base_purge_proc_attrs(void)
-{
-    /*
-     * Purge the attributes
-     */
-    opal_hash_table_remove_all(modex_data);
-    OBJ_RELEASE(modex_data);
-    modex_data = OBJ_NEW(opal_hash_table_t);    
-    opal_hash_table_init(modex_data, 256);
-    
-    /*
-     * Clear the modex buffer
-     */
-    OBJ_RELEASE(modex_buffer);
-    num_entries = 0;
-    modex_buffer = OBJ_NEW(opal_buffer_t);
-
-    return ORTE_SUCCESS;
-}
-
-int orte_grpcomm_base_pack_modex_entries(opal_buffer_t *buf)
-{
-    int rc;
-    
-    OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                         "%s grpcomm:base:pack_modex: reporting %ld entries",
-                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
-                         (long)num_entries));
-    
-    /* put the number of entries into the buffer */
-    OPAL_THREAD_LOCK(&mutex);
-    if (ORTE_SUCCESS != (rc = opal_dss.pack(buf, &num_entries, 1, ORTE_STD_CNTR))) {
-        ORTE_ERROR_LOG(rc);
-        goto cleanup;
-    }
-    
-    /* if there are entries, non-destructively copy the data across */
-    if (0 < num_entries) {
-        if (ORTE_SUCCESS != (opal_dss.copy_payload(buf, modex_buffer))) {
-            ORTE_ERROR_LOG(rc);
-        }
-    }
-    
-cleanup:
-    OPAL_THREAD_UNLOCK(&mutex);
-    return rc;
-}
 
 int orte_grpcomm_base_update_modex_entries(orte_process_name_t *proc_name,
                                            opal_buffer_t *rbuf)
 {
-    modex_proc_data_t *proc_data;
-    modex_attr_data_t *attr_data;
     int rc = ORTE_SUCCESS;
-    orte_std_cntr_t num_recvd_entries;
+    int32_t num_recvd_entries;
     orte_std_cntr_t cnt;
     orte_std_cntr_t j;
 
-    /* look up the modex data structure */
-    proc_data = modex_lookup_orte_proc(proc_name);
-    if (proc_data == NULL) {
-        /* report the error */
-        opal_output(0, "grpcomm:base:update_modex: received modex info for unknown proc %s\n",
-                    ORTE_NAME_PRINT(proc_name));
-        return ORTE_ERR_NOT_FOUND;
-    }
-    
-    OPAL_THREAD_LOCK(&proc_data->modex_lock);
-    
     /* unpack the number of entries for this proc */
     cnt=1;
-    if (ORTE_SUCCESS != (rc = opal_dss.unpack(rbuf, &num_recvd_entries, &cnt, ORTE_STD_CNTR))) {
+    if (ORTE_SUCCESS != (rc = opal_dss.unpack(rbuf, &num_recvd_entries, &cnt, OPAL_INT32))) {
         ORTE_ERROR_LOG(rc);
         goto cleanup;
     }
@@ -847,7 +455,7 @@ int orte_grpcomm_base_update_modex_entries(orte_process_name_t *proc_name,
      * Extract the attribute names and values
      */
     for (j = 0; j < num_recvd_entries; j++) {
-        size_t num_bytes;
+        int32_t num_bytes;
         void *bytes = NULL;
         char *attr_name;
         
@@ -858,94 +466,145 @@ int orte_grpcomm_base_update_modex_entries(orte_process_name_t *proc_name,
         }
         
         cnt = 1;
-        if (ORTE_SUCCESS != (rc = opal_dss.unpack(rbuf, &num_bytes, &cnt, OPAL_SIZE))) {
+        if (ORTE_SUCCESS != (rc = opal_dss.unpack(rbuf, &num_bytes, &cnt, OPAL_INT32))) {
             ORTE_ERROR_LOG(rc);
             goto cleanup;
         }
-        if (num_bytes != 0) {
+        if (0 < num_bytes) {
             if (NULL == (bytes = malloc(num_bytes))) {
                 ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE);
                 rc = ORTE_ERR_OUT_OF_RESOURCE;
                 goto cleanup;
             }
-            cnt = (orte_std_cntr_t) num_bytes;
+            cnt = (orte_std_cntr_t)num_bytes;
             if (ORTE_SUCCESS != (rc = opal_dss.unpack(rbuf, bytes, &cnt, OPAL_BYTE))) {
                 ORTE_ERROR_LOG(rc);
                 goto cleanup;
             }
             num_bytes = cnt;
+            /* store it in the database */
+            if (ORTE_SUCCESS != (rc = orte_db.store(proc_name, attr_name, (void*)bytes, num_bytes))) {
+                ORTE_ERROR_LOG(rc);
+                goto cleanup;
+            }
         }
-        
-        /*
-         * Lookup the corresponding modex structure
-         */
-        if (NULL == (attr_data = modex_lookup_attr_data(proc_data, 
-                                                        attr_name, true))) {
-            opal_output(0, "grpcomm:base:update_modex: modex_lookup_attr_data failed\n");
-            rc = ORTE_ERR_NOT_FOUND;
-            goto cleanup;
-        }
-        if (NULL != attr_data->attr_data) {
-            /* some pre-existing value must be here - release it */
-            free(attr_data->attr_data);
-        }
-        attr_data->attr_data = bytes;
-        attr_data->attr_data_size = num_bytes;
-        proc_data->modex_received_data = true;            
     }
     
-cleanup:
-    OPAL_THREAD_UNLOCK(&proc_data->modex_lock);
+ cleanup:
     return rc;
 }
 
-int orte_grpcomm_base_load_modex_data(orte_process_name_t *proc_name, char *attr_name,
-                                      void *data, int num_bytes)
+int orte_grpcomm_base_set_proc_attr(const char *attr_name,
+                                    const void *data,
+                                    size_t size)
 {
-    modex_proc_data_t *proc_data;
-    modex_attr_data_t *attr_data;
-    int rc = ORTE_SUCCESS;
-    void *bytes;
+    int rc;
     
     OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
-                         "%s grpcomm:base:load_modex_data: loading %ld bytes for attr %s on proc %s",
+                         "%s grpcomm:set_proc_attr: setting attribute %s data size %lu",
                          ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
-                         (long)num_bytes, attr_name, ORTE_NAME_PRINT(proc_name)));
+                         attr_name, (unsigned long)size));
 
-    /* look up the modex data structure */
-    proc_data = modex_lookup_orte_proc(proc_name);
-    if (proc_data == NULL) {
-        /* report the error */
-        opal_output(0, "grpcomm:base:update_modex: received modex info for unknown proc %s\n",
-                    ORTE_NAME_PRINT(proc_name));
-        return ORTE_ERR_NOT_FOUND;
-    }
+    rc = orte_db.store(ORTE_PROC_MY_NAME, attr_name, data, size);
     
-    OPAL_THREAD_LOCK(&proc_data->modex_lock);
-    
-    /*
-     * Lookup the corresponding modex structure
-     */
-    if (NULL == (attr_data = modex_lookup_attr_data(proc_data, 
-                                                    attr_name, true))) {
-        opal_output(0, "grpcomm:base:update_modex: modex_lookup_attr_data failed\n");
-        rc = ORTE_ERR_NOT_FOUND;
-        goto cleanup;
-    }
-    if (NULL != attr_data->attr_data) {
-        /* some pre-existing value must be here - release it */
-        free(attr_data->attr_data);
-    }
-    /* create space for the data - this is necessary since the data being
-     * passed to us may be static or released on the other end
-     */
-    bytes = (void*)malloc(num_bytes);
-    memcpy(bytes, data, num_bytes);
-    attr_data->attr_data = bytes;
-    attr_data->attr_data_size = num_bytes;
-    proc_data->modex_received_data = true;            
-    
-cleanup:
-    OPAL_THREAD_UNLOCK(&proc_data->modex_lock);
+    return rc;
+}
+
+int orte_grpcomm_base_get_proc_attr(const orte_process_name_t *proc,
+                                    const char *attribute_name, void **val, 
+                                    size_t *size)
+{
+    orte_db_keyval_t *kv;
+    opal_list_t data;
+    int rc;
+
+    OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
+                         "%s grpcomm:get_proc_attr: searching for attr %s on proc %s",
+                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), attribute_name,
+                         ORTE_NAME_PRINT(proc)));
+
+    /* set defaults */
+    *val = NULL;
+    *size = 0;
+
+    /* fetch the data */
+    OBJ_CONSTRUCT(&data, opal_list_t);
+    if (ORTE_SUCCESS != (rc = orte_db.fetch(proc, attribute_name, &data))) {
+        ORTE_ERROR_LOG(rc);
+        goto cleanup;
+    }
+    
+    /* this interface to the MPI layer only supports returning one value */
+    if (1 < opal_list_get_size(&data)) {
+        return ORTE_ERROR;
+    }
+    kv = (orte_db_keyval_t*)opal_list_remove_first(&data);
+    /* transfer the data */
+    *val = kv->value.bytes;
+    *size = kv->value.size;
+    kv->value.bytes = NULL;
+    /* cleanup */
+    OBJ_RELEASE(kv);
+
+ cleanup:
+    OBJ_DESTRUCT(&data);
+    return rc;
+} 
+
+int orte_grpcomm_base_purge_proc_attrs(void)
+{
+    return orte_db.remove(NULL, NULL);
+}
+
+int orte_grpcomm_base_pack_modex_entries(opal_buffer_t *buf)
+{
+    int rc;
+    int32_t num_entries;
+    orte_db_keyval_t *kv;
+    opal_list_t data;
+
+    /* fetch our data */
+    OBJ_CONSTRUCT(&data, opal_list_t);
+    if (ORTE_SUCCESS != (rc = orte_db.fetch(ORTE_PROC_MY_NAME, NULL, &data))) {
+        ORTE_ERROR_LOG(rc);
+        goto cleanup;
+    }
+    num_entries = opal_list_get_size(&data);
+
+    OPAL_OUTPUT_VERBOSE((5, orte_grpcomm_base.output,
+                         "%s grpcomm:base:pack_modex: reporting %d entries",
+                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), num_entries));
+    
+    /* put the number of entries into the buffer */
+    if (ORTE_SUCCESS != (rc = opal_dss.pack(buf, &num_entries, 1, OPAL_INT32))) {
+        ORTE_ERROR_LOG(rc);
+        goto cleanup;
+    }
+    
+    /* if there are entries, store them */
+    while (NULL != (kv = (orte_db_keyval_t*)opal_list_remove_first(&data))) {
+        if (ORTE_SUCCESS != (opal_dss.pack(buf, &kv->key, 1, OPAL_STRING))) {
+            ORTE_ERROR_LOG(rc);
+            break;
+        }
+        if (ORTE_SUCCESS != (opal_dss.pack(buf, &(kv->value.size), 1, OPAL_INT32))) {
+            ORTE_ERROR_LOG(rc);
+            break;
+        }
+        if (0 < kv->value.size) {
+            if (ORTE_SUCCESS != (opal_dss.pack(buf, kv->value.bytes, kv->value.size, OPAL_BYTE))) {
+                ORTE_ERROR_LOG(rc);
+                break;
+            }
+        }
+        OBJ_RELEASE(kv);
+    }
+
+ cleanup:
+    while (NULL != (kv = (orte_db_keyval_t*)opal_list_remove_first(&data))) {
+        OBJ_RELEASE(kv);
+    }
+    OBJ_DESTRUCT(&data);
+
     return rc;
 }

orte/mca/grpcomm/grpcomm.h

@@ -79,7 +79,7 @@ typedef int (*orte_grpcomm_base_module_modex_set_proc_attr_fn_t)(const char* att
                                                                  const void *buffer, size_t size);
 
 /* get an attribute buffer */
-typedef int (*orte_grpcomm_base_module_modex_get_proc_attr_fn_t)(const orte_process_name_t name,
+typedef int (*orte_grpcomm_base_module_modex_get_proc_attr_fn_t)(const orte_process_name_t *name,
                                                                  const char* attr_name,
                                                                  void **buffer, size_t *size);
 

orte/tools/orte-info/components.c

@@ -56,6 +56,8 @@
 #include "orte/mca/errmgr/base/base.h"
 #include "orte/mca/grpcomm/grpcomm.h"
 #include "orte/mca/grpcomm/base/base.h"
+#include "orte/mca/db/db.h"
+#include "orte/mca/db/base/base.h"
 #include "orte/mca/ess/ess.h"
 #include "orte/mca/ess/base/base.h"
 #include "orte/util/show_help.h"
@@ -332,6 +334,14 @@ void orte_info_open_components(void)
     map->components = &orte_grpcomm_base.components_available;
     opal_pointer_array_add(&component_map, map);
     
+    if (ORTE_SUCCESS != orte_db_base_open()) {
+        goto error;
+    }
+    map = OBJ_NEW(orte_info_component_map_t);
+    map->type = strdup("db");
+    map->components = &orte_db_base.available_components;
+    opal_pointer_array_add(&component_map, map);
+    
     if (ORTE_SUCCESS != orte_ess_base_open()) {
         goto error;
     }
@@ -487,6 +497,7 @@ void orte_info_close_components()
          */
         
         (void) orte_grpcomm_base_close();
+        (void) orte_db_base_close();
         (void) orte_ess_base_close();
         (void) orte_show_help_finalize();
 #if !ORTE_DISABLE_FULL_SUPPORT

orte/tools/orte-info/orte-info.c

@@ -239,6 +239,7 @@ int main(int argc, char *argv[])
     opal_pointer_array_add(&mca_types, "errmgr");
     opal_pointer_array_add(&mca_types, "ess");
     opal_pointer_array_add(&mca_types, "grpcomm");
+    opal_pointer_array_add(&mca_types, "db");
     opal_pointer_array_add(&mca_types, "notifier");
     
     /* Execute the desired action(s) */

orte/util/name_fns.c

@@ -567,6 +567,22 @@ uint64_t  orte_util_hash_name(const orte_process_name_t * name) {
     
     return hash;
 }
+/* hash a vpid based on Robert Jenkin's algorithm - note
+ * that the precise values of the constants in the algo are
+ * irrelevant.
+ */
+uint32_t  orte_util_hash_vpid(orte_vpid_t vpid) {
+    uint32_t hash;
+    
+    hash = vpid;
+    hash = (hash + 0x7ed55d16) + (hash<<12);
+    hash = (hash ^ 0xc761c23c) ^ (hash>>19);
+    hash = (hash + 0x165667b1) + (hash<<5);
+    hash = (hash + 0xd3a2646c) ^ (hash<<9);
+    hash = (hash + 0xfd7046c5) + (hash<<3);
+    hash = (hash ^ 0xb55a4f09) ^ (hash>>16);
+    return hash;
+}
 
 /* sysinfo conversion to and from string */
 int orte_util_convert_string_to_sysinfo(char **cpu_type, char **cpu_model,

orte/util/name_fns.h

@@ -125,6 +125,7 @@ ORTE_DECLSPEC int orte_util_compare_name_fields(orte_ns_cmp_bitmask_t fields,
                                   const orte_process_name_t* name2);
 /** This funtion returns a guaranteed unique hash value for the passed process name */
 ORTE_DECLSPEC uint64_t orte_util_hash_name(const orte_process_name_t * name);
+ORTE_DECLSPEC uint32_t orte_util_hash_vpid(orte_vpid_t vpid);
 ORTE_DECLSPEC int orte_util_convert_string_to_sysinfo(char **cpu_type, char **cpu_model,
                                              const char* sysinfo_string);
 ORTE_DECLSPEC int orte_util_convert_sysinfo_to_string(char** sysinfo_string,