herr_t H5Pset_core_write_tracking(
hid_t fapl_id,
hbool_t is_enabled,
size_t page_size
)
H5FD_CORE
.
This write tracking feature is enabled and disabled with
is_enabled
.
The default setting is that write tracking is disabled, or off.
To avoid a large number of small writes, changes can be
aggregated into pages of a user-specified size, page_size
.
Setting page_size
to 1
enables
tracking with no page aggregation.
The backing store option is set via the function
H5Pset_fapl_core
.
H5Pset_fapl_core
.
It is an error to use this function with any other VFD.
It is an error to use this function when the backing store flag
has not been set using H5Pset_fapl_core
.
This function only applies to the backing store write operation
which typically occurs when the file is flushed or closed. This
function has no relationship to the increment
parameter
passed to H5Pset_fapl_core
.
For optimum performance, the page_size
parameter
should be a power of two.
It is an error to set the page size to 0.
hid_t fapl_id |
IN: File access property list identifier. |
hbool_t is_enabled |
IN: Boolean value specifying whether feature is enabled. |
size_t page_size |
IN: Positive integer specifying size, in bytes,
of write aggregation pages.
Value of 1 (one) enables tracking with no paging.
|
H5Pget_core_write_tracking
Release | Change |
1.8.13 | C function introduced with this release. |
1.8.14 |
C function modified in this release to return error
if page_size is set to 0 (zero).
|