diff options
Diffstat (limited to 'src/H5FDpublic.h')
| -rw-r--r-- | src/H5FDpublic.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h index 49c89bc..52a8dec 100644 --- a/src/H5FDpublic.h +++ b/src/H5FDpublic.h @@ -90,8 +90,16 @@ typedef enum H5FD_mem_t { * the library will attempt to cache metadata as it is written to the file * and build up a larger block of metadata to eventually pass to the VFL * 'write' routine. + * + * Distinguish between updating the metadata accumulator on writes and + * reads. This is particularly (perhaps only, even) important for MPI-I/O + * where we guarantee that writes are collective, but reads may not be. + * If we were to allow the metadata accumulator to be written during a + * read operation, the application would hang. */ -#define H5FD_FEAT_ACCUMULATE_METADATA 0x00000002 +#define H5FD_FEAT_ACCUMULATE_METADATA_WRITE 0x00000002 +#define H5FD_FEAT_ACCUMULATE_METADATA_READ 0x00000004 +#define H5FD_FEAT_ACCUMULATE_METADATA (H5FD_FEAT_ACCUMULATE_METADATA_WRITE|H5FD_FEAT_ACCUMULATE_METADATA_READ) /* * Defining the H5FD_FEAT_DATA_SIEVE for a VFL driver means that * the library will attempt to cache raw data as it is read from/written to @@ -99,13 +107,13 @@ typedef enum H5FD_mem_t { * http://www.mcs.anl.gov/~thakur/papers/romio-coll.ps.gz * http://www.mcs.anl.gov/~thakur/papers/mpio-high-perf.ps.gz */ -#define H5FD_FEAT_DATA_SIEVE 0x00000004 +#define H5FD_FEAT_DATA_SIEVE 0x00000008 /* * Defining the H5FD_FEAT_AGGREGATE_SMALLDATA for a VFL driver means that * the library will attempt to allocate a larger block for "small" raw data * and then sub-allocate "small" raw data requests from that larger block. */ -#define H5FD_FEAT_AGGREGATE_SMALLDATA 0x00000008 +#define H5FD_FEAT_AGGREGATE_SMALLDATA 0x00000010 /* Forward declaration */ |