diff options
| author | Quincey Koziol <koziol@hdfgroup.org> | 2002-06-05 15:19:07 (GMT) |
|---|---|---|
| committer | Quincey Koziol <koziol@hdfgroup.org> | 2002-06-05 15:19:07 (GMT) |
| commit | 1eb15039114f4bcda7269cc406111138ceba1f0f (patch) | |
| tree | fe953b93bf77b54218ceacbac8083886a3d7f5b8 /src/H5FDmpio.c | |
| parent | 1500b00b079e8f50b4836e3156d76ce5a7f178eb (diff) | |
| download | hdf5-1eb15039114f4bcda7269cc406111138ceba1f0f.zip hdf5-1eb15039114f4bcda7269cc406111138ceba1f0f.tar.gz hdf5-1eb15039114f4bcda7269cc406111138ceba1f0f.tar.bz2 | |
[svn-r5535] 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.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c index fe7cfb1..6b4a20c 100644 --- a/src/H5FDmpio.c +++ b/src/H5FDmpio.c @@ -952,6 +952,7 @@ 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); |