Sets estimated number of links and length of link names in a group
H5P_SET_EST_LINK_INFO ( gcpl_id, est_num_entries, est_name_len )
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 limit for
est_num_entries is 64 K.
The estimated average length of the anticipated link names is passed in
est_name_len. The limit for
est_name_len is 64 K.
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
0 (zero) for maximum efficiency. This will prevent the group from being created in the compact format.
See Group implementations in HDF5 in the H5G API introduction for a discussion of the available types of HDF5 group structures.
Returns a non-negative value if successful; otherwise returns a negative value.
|1.8.0||Function introduced in this release.|
--- Last Modified: November 15, 2019 | 10:30 AM