H5Pget_link_phase_change
(
hid_t gcpl_id
,
unsigned *max_compact
,
unsigned *min_dense
)
H5Pget_link_phase_change
queries the
maximum number of entries for a compact group and the
minimum number links to require before converting a group
to a dense form.
In the compact format, links are stored as messages in the group’s header. In the dense format, links are stored in a fractal heap and indexed with a version 2 B-tree.
max_compact
is the maximum number of links
to store as header messages in the group header before
converting the group to the dense format.
Groups that are in the compact format and exceed this number of links
are automatically converted to the dense format.
min_dense
is the minimum number of links to
store in the dense format. Groups which are in dense format
and in which the number of links falls below this number are
automatically converted back to the compact format.
In the compact format, links are stored as messages in the group’s header. In the dense format, links are stored in a fractal heap and indexed with a version 2 B-tree.
See H5Pset_link_phase_change
for a discussion of traditional, compact, and dense group storage.
hid_t gcpl_id |
IN: Group creation property list identifier |
unsigned *max_compact |
OUT: Maximum number of links for compact storage |
unsigned *min_dense |
OUT: Minimum number of links for dense storage |
SUBROUTINE h5pset_link_phase_change_f(gcpl_id, max_compact, min_dense, hdferr) IMPLICIT NONE INTEGER(HID_T), INTENT(IN) :: gcpl_id ! Group creation property list identifier INTEGER, INTENT(IN) :: max_compact ! Maximum number of attributes to be stored ! in compact storage INTEGER, INTENT(IN) :: min_dense ! Minimum number of attributes to be stored ! in dense storage INTEGER, INTENT(OUT) :: hdferr ! Error code ! 0 on success and -1 on failure END SUBROUTINE h5pset_link_phase_change_f
Release | C |
1.8.0 | Function introduced in this release. |