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authorQuincey Koziol <koziol@hdfgroup.org>2002-06-05 15:23:20 (GMT)
committerQuincey Koziol <koziol@hdfgroup.org>2002-06-05 15:23:20 (GMT)
commit6b1208407f5886c917f1ebb38bac058eeb980e30 (patch)
tree6b29e7da66abf76d1ed3e1b7ea52b7a7638f3534 /src/H5FDmpio.c
parentc72c322f6265f121cfd2542f081875f42c9d6fed (diff)
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[svn-r5536] Purpose:
New feature. Description: Added a "small data" block allocation mechanism to the library, similar to the mechanism used for allocating metadata currently. See the RFC for more details: http://hdf.ncsa.uiuc.edu/RFC/SmallData/SmallData.html This reduces the number of I/O operations which hit the disk for my test program from 19 to 15 (i.e. from 393 to 15, overall). Platforms tested: Solaris 2.7 (arabica) w/FORTRAN and FreeBSD 4.5 (sleipnir) w/C++
Diffstat (limited to 'src/H5FDmpio.c')
-rw-r--r--src/H5FDmpio.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c
index 69e2b49..0ec8db3 100644
--- a/src/H5FDmpio.c
+++ b/src/H5FDmpio.c
@@ -944,6 +944,7 @@ H5FD_mpio_query(const H5FD_t *_file, unsigned long *flags /* out */)
if(flags) {
*flags=0;
*flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */
+ *flags|=H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */
} /* end if */
FUNC_LEAVE(ret_value);