[svn-r7861] Purpose:

    Bug fix

Description:
    Our previous "optimization" of metadata writing which only wrote metadata
from one process was abusing MPI-I/O and after some consultation with Rob Ross
and Rajeev Thakur, Albert & I have come up with a solution...

Solution:
    Instead of only writing from one process, issue a collective write
operation with all processes, for metadata writes.

Platforms tested:
    FreeBSD 4.9 (sleipnir)
    h5committest

1 files changed, 2 insertions, 0 deletions

diff --git a/src/H5F.c b/src/H5F.c
index 63d6408..586e416 100644
--- a/src/H5F.c
+++ b/src/H5F.c
@@ -232,6 +232,7 @@ H5F_init_interface(void)
     
     FUNC_ENTER_NOINIT(H5F_init_interface);
 
+#ifdef OLD_METADATA_WRITE
 #ifdef H5_HAVE_PARALLEL
     {
         /* Allow MPI buf-and-file-type optimizations? */
@@ -241,6 +242,7 @@ H5F_init_interface(void)
         }
     }
 #endif /* H5_HAVE_PARALLEL */
+#endif /* OLD_METADATA_WRITE */
 
     /*
      * Initialize the atom group for the file IDs. There are two groups: