Fortran90 Interface: h5pset_est_link_info_f
SUBROUTINE h5pset_est_link_info_f(gcpl_id, est_num_entries, est_name_len, &
INTEGER(HID_T), INTENT(IN) :: gcpl_id
! Group creation property list identifier
INTEGER, INTENT(IN) :: est_num_entries
! Estimated number of links to be
! inserted into group
INTEGER, INTENT(IN) :: est_name_len
! Estimated average length of link names
INTEGER, INTENT(OUT) :: hdferr ! Error code
! 0 on success and -1 on failure
END SUBROUTINE H5Pset_est_link_info_f
IN: Group creation property list identifier
IN: Estimated number of links to be inserted into group
IN: Estimated average length of link names
H5P_SET_EST_LINK_INFO inserts two settings into the group creation property list gcpl_id: the estimated number of links that are expected to be inserted into a group created with the property list and the estimated average length of those link names.
The estimated number of links is passed in est_num_entries.
The estimated average length of the anticipated link names is passed 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.
If a group is expected to have many links and to be stored in dense format, set est_num_entries to 0 (zero) for maximum efficiency. This will prevent the group from being created in the compact format.