Hi, all,
I have a question about metadata write mode.
The HDF5 document linked below says “When engaging in parallel I/O, all metadata write operations must be collective.”.
https://support.hdfgroup.org/HDF5/doc/RM/RM_H5P.html#Property-SetAllCollMetadataOps
However, I called H5Pset_coll_metadata_write() with ‘false’, it works well with Independent I/O.
Also, the HDF5 document linked below says “If independent access is selected, the library uses the default method for doing metadata I/O either from process zero or independently from each process.”
It looks like metadata write can work using independent I/O.
https://support.hdfgroup.org/HDF5/doc/RM/RM_H5P.html#Property-SetCollMetadataWrite
Which one is the correct description? Can I use independent I/O mode for metadata in parallel applications?