OUT: Estimated number of links to be inserted into group
OUT: Estimated average length of link names
H5P_GET_EST_LINK_INFO queries a group creation property list, gcpl_id, for its “estimated number of links” and “estimated average name length” settings.
The estimated number of links anticipated to be inserted into a group created with this property list is returned in est_num_entries.
The estimated average length of the anticipated link names is returned in est_name_len.
The values for these two settings are multiplied to compute the initial local heap size (for old-style groups, if the local heap size hint is not set) or the initial object header size for (new-style compact groups; see “Group implementations in HDF5”). Accurately setting these parameters will help reduce wasted file space.
A value of 0 (zero) in est_num_entries will prevent a group from being created in the compact format.