# Functions with No Access Property List Parameter
that May Generate Metadata Reads

Currently there are several operations in HDF5 that can issue metadata reads from the metadata cache, but that take no property list. It is therefore not possible set a collective requirement individually for those operations. The only solution with the HDF5 1.10.0 release is to set the collective requirement globally on `H5Fopen` or `H5Fcreate` for all metadata operations to be collective.

The following is a list of those functions in the HDF5 Library. This list is integral to the discussion in the H5Pset_all_coll_metadata_ops entry:

Functions with No Access Property List Parameter
that May Generate Metadata Reads

    H5Awrite
    H5Aread
    H5Arename
    H5Aiterate2
    H5Adelete
    H5Aexists

    H5Dget_space_status
    H5Dget_storage_size
    H5Dset_extent
    H5Ddebug
    H5Dclose
    H5Dget_get_create_plist
    H5Dget_space   (when dataset is a virtual dataset)

    H5Gget_create_plist
    H5Gget_info
    H5Gclose

    H5Literate
    H5Lvisit

    H5Rcreate
    H5Rdereference2   (when reference is an object reference)
    H5Rget_region
    H5Rget_obj_type2
    H5Rget_name

    H5Ocopy
    H5Oopen_by_addr
    H5Oincr_refcount
    H5Odecr_refcount
    H5Oget_info
    H5Oset_comment
    H5Ovisit

    H5Fis_hdf5
    H5Fflush
    H5Fclose
    H5Fget_file_image
    H5Freopen
    H5Fget_freespace
    H5Fget_info2
    H5Fget_free_sections
    H5Fmount
    H5Funmount

    H5Iget_name

    H5Tget_create_plist
    H5Tclose

    H5Zunregister

And most deprecated functions

The HDF Group may address the above limitation in a future major release, but no decision has been made at this time. Such a change might, for example, include adding new versions of some or all the above functions with an extra property list parameter to allow an individual setting for the collective calling requirement.

See Also:

H5Pset_coll_metadata_write H5Pget_coll_metadata_write | H5Pset_all_coll_metadata_ops H5Pget_all_coll_metadata_ops

Last modified: 6 April 2016