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 |
Release | C |
1.8.0 | Function introduced in this release. |