[svn-r23535] Description:

    Bring r23529 from trunk to 1.8 branch:

    Stop aliasing property to indicate internal collective metadata operations
with property to perform collective raw data operations from the application.

Tested on:
    Mac OSX/64 10.8.3 (amazon) w/parallel
    (daily tests on trunk)

3 files changed, 39 insertions, 34 deletions

diff --git a/src/H5AC.c b/src/H5AC.c
index 4a4332a..fce477d 100644
--- a/src/H5AC.c
+++ b/src/H5AC.c
@@ -259,6 +259,7 @@ H5AC_init_interface(void)
     H5P_genclass_t  *xfer_pclass;   /* Dataset transfer property list class object */
     H5P_genplist_t  *xfer_plist;    /* Dataset transfer property list object */
     unsigned block_before_meta_write; /* "block before meta write" property value */
+    unsigned coll_meta_write;       /* "collective metadata write" property value */
     unsigned library_internal=1;    /* "library internal" property value */
     H5FD_mpio_xfer_t xfer_mode;     /* I/O transfer mode property value */
     herr_t ret_value=SUCCEED;           /* Return value */
@@ -272,6 +273,7 @@ H5AC_init_interface(void)
     if (NULL == (xfer_pclass = H5I_object(H5P_CLS_DATASET_XFER_g)))
         HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get property list class")
 
+
     /* Get an ID for the blocking, collective H5AC dxpl */
     if ((H5AC_dxpl_id=H5P_create_id(xfer_pclass,FALSE)) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "unable to register property list")
@@ -289,10 +291,12 @@ H5AC_init_interface(void)
     if(H5P_insert(xfer_plist,H5AC_LIBRARY_INTERNAL_NAME,H5AC_LIBRARY_INTERNAL_SIZE,&library_internal,NULL,NULL,NULL,NULL,NULL,NULL)<0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't insert metadata cache dxpl property")
 
-    /* Set the transfer mode */
-    xfer_mode=H5FD_MPIO_COLLECTIVE;
-    if (H5P_set(xfer_plist,H5D_XFER_IO_XFER_MODE_NAME,&xfer_mode)<0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
+    /* Insert 'collective metadata write' property */
+    coll_meta_write = 1;
+    if(H5P_insert(xfer_plist, H5AC_COLLECTIVE_META_WRITE_NAME, H5AC_COLLECTIVE_META_WRITE_SIZE, &coll_meta_write,
+                  NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't insert metadata cache dxpl property")
+
 
     /* Get an ID for the non-blocking, collective H5AC dxpl */
     if ((H5AC_noblock_dxpl_id=H5P_create_id(xfer_pclass,FALSE)) < 0)
@@ -311,10 +315,12 @@ H5AC_init_interface(void)
     if(H5P_insert(xfer_plist,H5AC_LIBRARY_INTERNAL_NAME,H5AC_LIBRARY_INTERNAL_SIZE,&library_internal,NULL,NULL,NULL,NULL,NULL,NULL)<0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't insert metadata cache dxpl property")
 
-    /* Set the transfer mode */
-    xfer_mode=H5FD_MPIO_COLLECTIVE;
-    if (H5P_set(xfer_plist,H5D_XFER_IO_XFER_MODE_NAME,&xfer_mode)<0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
+    /* Insert 'collective metadata write' property */
+    coll_meta_write = 1;
+    if(H5P_insert(xfer_plist, H5AC_COLLECTIVE_META_WRITE_NAME, H5AC_COLLECTIVE_META_WRITE_SIZE, &coll_meta_write,
+                  NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't insert metadata cache dxpl property")
+
 
     /* Get an ID for the non-blocking, independent H5AC dxpl */
     if ((H5AC_ind_dxpl_id=H5P_create_id(xfer_pclass,FALSE)) < 0)
@@ -333,10 +339,11 @@ H5AC_init_interface(void)
     if(H5P_insert(xfer_plist,H5AC_LIBRARY_INTERNAL_NAME,H5AC_LIBRARY_INTERNAL_SIZE,&library_internal,NULL,NULL,NULL,NULL,NULL,NULL)<0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't insert metadata cache dxpl property")
 
-    /* Set the transfer mode */
-    xfer_mode=H5FD_MPIO_INDEPENDENT;
-    if (H5P_set(xfer_plist,H5D_XFER_IO_XFER_MODE_NAME,&xfer_mode)<0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
+    /* Insert 'collective metadata write' property */
+    coll_meta_write = 0;
+    if(H5P_insert(xfer_plist, H5AC_COLLECTIVE_META_WRITE_NAME, H5AC_COLLECTIVE_META_WRITE_SIZE, &coll_meta_write,
+                  NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't insert metadata cache dxpl property")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5ACprivate.h b/src/H5ACprivate.h
index 359b576..68412a0 100644
--- a/src/H5ACprivate.h
+++ b/src/H5ACprivate.h
@@ -174,6 +174,11 @@ typedef H5C_t	H5AC_t;
 #define H5AC_BLOCK_BEFORE_META_WRITE_SIZE       sizeof(unsigned)
 #define H5AC_BLOCK_BEFORE_META_WRITE_DEF        0
 
+/* Definitions for "collective metadata write" property */
+#define H5AC_COLLECTIVE_META_WRITE_NAME         "H5AC_collective_metadata_write"
+#define H5AC_COLLECTIVE_META_WRITE_SIZE         sizeof(unsigned)
+#define H5AC_COLLECTIVE_META_WRITE_DEF          0
+
 /* Definitions for "library internal" property */
 #define H5AC_LIBRARY_INTERNAL_NAME       "H5AC_library_internal"
 #define H5AC_LIBRARY_INTERNAL_SIZE       sizeof(unsigned)
diff --git a/src/H5C.c b/src/H5C.c
index 8062d7f..e4a3e77 100644
--- a/src/H5C.c
+++ b/src/H5C.c
@@ -75,6 +75,9 @@
 
 
 #include "H5private.h"		/* Generic Functions			*/
+#ifdef H5_HAVE_PARALLEL
+#include "H5ACprivate.h"        /* Metadata cache                       */
+#endif /* H5_HAVE_PARALLEL */
 #include "H5Cpkg.h"		/* Cache				*/
 #include "H5Dprivate.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
@@ -7599,37 +7602,27 @@ H5C_flush_single_entry(H5F_t *	   	   f,
 
 #ifdef H5_HAVE_PARALLEL
 #ifndef NDEBUG
-
         /* If MPI based VFD is used, do special parallel I/O sanity checks.
          * Note that we only do these sanity checks when the clear_only flag
          * is not set, and the entry to be flushed is dirty.  Don't bother
          * otherwise as no file I/O can result.
          */
-        if ( ( ! clear_only ) &&
-             ( entry_ptr->is_dirty ) &&
-             ( IS_H5FD_MPI(f) ) ) {
-
-            H5P_genplist_t *dxpl;           /* Dataset transfer property list */
-            H5FD_mpio_xfer_t xfer_mode;     /* I/O xfer mode property value */
+        if(!clear_only && entry_ptr->is_dirty &&
+                IS_H5FD_MPI(f)) {
+            H5P_genplist_t *dxpl;       /* Dataset transfer property list */
+            unsigned coll_meta;         /* Collective metadata write flag */
 
             /* Get the dataset transfer property list */
-            if ( NULL == (dxpl = H5I_object(primary_dxpl_id)) ) {
-
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, \
-                            "not a dataset transfer property list")
-            }
+            if(NULL == (dxpl = H5I_object(primary_dxpl_id)))
+                HGOTO_ERROR(H5E_CACHE, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
 
-            /* Get the transfer mode property */
-            if( H5P_get(dxpl, H5D_XFER_IO_XFER_MODE_NAME, &xfer_mode) < 0 ) {
-
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, \
-                            "can't retrieve xfer mode")
-            }
-
-            /* Sanity check transfer mode */
-            HDassert( xfer_mode == H5FD_MPIO_COLLECTIVE );
-        }
+            /* Get the collective metadata write property */
+            if(H5P_get(dxpl, H5AC_COLLECTIVE_META_WRITE_NAME, &coll_meta) < 0)
+                HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "can't retrieve xfer mode")
 
+            /* Sanity check collective metadata write flag */
+            HDassert(coll_meta);
+        } /* end if */
 #endif /* NDEBUG */
 #endif /* H5_HAVE_PARALLEL */