H5Pget_est_link_info
(
hid_t gcpl_id
,
unsigned *est_num_entries
,
unsigned *est_name_len
)
H5Pget_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.
See “Group implementations in HDF5” in the H5G API introduction for a discussion of the available types of HDF5 group structures.
hid_t gcpl_id |
IN: Group creation property list identifier |
unsigned *est_num_entries |
OUT: Estimated number of links to be inserted into group |
unsigned *est_name_len |
OUT: Estimated average length of link names |
SUBROUTINE h5pget_est_link_info_f(gcpl_id,est_num_entries, est_name_len,hdferr) IMPLICIT NONE INTEGER(HID_T), INTENT(IN) :: gcpl_id ! Group creation property list id INTEGER, INTENT(OUT) :: est_num_entries ! Estimated number of links to be ! inserted into group INTEGER, INTENT(OUT) :: est_name_len ! Estimated average length of link ! names INTEGER, INTENT(OUT) :: hdferr ! Error code ! 0 on success and -1 on failure END SUBROUTINE h5pget_est_link_info_f
Release | C |
1.8.0 | Function introduced in this release. |