diff options
Diffstat (limited to 'src/H5FDsubfiling/H5FDsubfiling.h')
| -rw-r--r-- | src/H5FDsubfiling/H5FDsubfiling.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/H5FDsubfiling/H5FDsubfiling.h b/src/H5FDsubfiling/H5FDsubfiling.h index 22dd906..b1cf53a 100644 --- a/src/H5FDsubfiling/H5FDsubfiling.h +++ b/src/H5FDsubfiling/H5FDsubfiling.h @@ -148,6 +148,27 @@ * pathname. */ #define H5FD_SUBFILING_SUBFILE_PREFIX "H5FD_SUBFILING_SUBFILE_PREFIX" +/** + * \def H5FD_SUBFILING_CONFIG_FILE_PREFIX + * Macro for name of the environment variable that specifies a prefix + * to apply to the subfiling configuration filename. Useful for cases + * where the application wants to place the configuration file in a + * different directory than the default of putting it alongside the + * generated subfiles. For example, when writing to node-local storage + * one may wish to place the configuration file on a scratch file + * system readable by all nodes, while the subfiles are initially + * written to the node-local storage. + * + * The value set for this environment variable is interpreted as a + * pathname that must already exist. + * + * NOTE: As this prefix string will be encoded in the driver info + * message that gets written to the file, there is an upper + * limit of about ~900 single-byte characters for this string, + * though possibly less due to other information the driver + * may encode. Avoid long prefix names where possible. + */ +#define H5FD_SUBFILING_CONFIG_FILE_PREFIX "H5FD_SUBFILING_CONFIG_FILE_PREFIX" /** * \enum H5FD_subfiling_ioc_select_t |