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| author | Robert Kim Yates <rkyates@llnl.gov> | 1998-08-28 23:37:58 (GMT) |
|---|---|---|
| committer | Robert Kim Yates <rkyates@llnl.gov> | 1998-08-28 23:37:58 (GMT) |
| commit | 1373661a78b7a6d3c7526cd8f80b9ba3460a1d74 (patch) | |
| tree | 83bd2e2ef70d44c57fa8fd53453aea99067ab10a /src/H5Gnode.c | |
| parent | 96c2b5fec405a2dd4a63b7482a431dfc984523df (diff) | |
| download | hdf5-1373661a78b7a6d3c7526cd8f80b9ba3460a1d74.zip hdf5-1373661a78b7a6d3c7526cd8f80b9ba3460a1d74.tar.gz hdf5-1373661a78b7a6d3c7526cd8f80b9ba3460a1d74.tar.bz2 | |
[svn-r630] Added code to eliminate redundant writes of metadata,
so only proc 0 writes it to disk. The elimination is activated
only when the environment variable HDF5_MPI_1_METAWRITE is nonzero;
otherwise all processes that opened the file will write the metadata to disk.
Diffstat (limited to 'src/H5Gnode.c')
| -rw-r--r-- | src/H5Gnode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/H5Gnode.c b/src/H5Gnode.c index 842e6a0..3c8005e 100644 --- a/src/H5Gnode.c +++ b/src/H5Gnode.c @@ -296,6 +296,7 @@ H5G_node_create(H5F_t *f, H5B_ins_t __unused__ op, void *_lt_key, * Jun 23 1997 * * Modifications: + * rky 980828 Only p0 writes metadata to disk. * *------------------------------------------------------------------------- */ @@ -351,6 +352,9 @@ H5G_node_flush(H5F_t *f, hbool_t destroy, const haddr_t *addr, H5G_ent_encode_vec(f, &p, sym->entry, sym->nsyms); HDmemset(p, 0, size - (p - buf)); +#ifdef HAVE_PARALLEL + H5F_mpio_tas_allsame( f->shared->lf, TRUE ); /* only p0 will write */ +#endif /* HAVE_PARALLEL */ status = H5F_block_write(f, addr, (hsize_t)size, H5D_XFER_DFLT, buf); buf = H5MM_xfree(buf); if (status < 0) |