H5P_SET_COLL_METADATA_WRITE

Content Layer

id	1195548671

Content Column

width	50.00001%
id	1195578110
class	rm_pagetree_col mobile-hide

Content Block

id	1195578111

Content Column

width	50.00001%
id	1195548673
class	hdf-rm-main-column

Content Block

id	1195548672

Include Content

render-without-blocks	true
page	.rm-navbar

HTML Wrap

class	hdf-print-only

Page Title

HTML Wrap

class	hdf-rm-summary-block

Hdf rm anchor

AnchorName	summary

Excerpt
Sets metadata write mode to collective or independent (default)

HTML Wrap

class	hdf-rm-content-block

Hdf rm anchor

AnchorName	procedure

Procedure:

HTML Wrap

class	hdf-rm-section

HTML Wrap

class	hdf_procedure

H5P_SET_COLL_METADATA_WRITE ( apl_id, is_collective )

Hdf rm anchor

AnchorName	signature

Signature:

HTML Wrap

class	hdf-rm-section

HTML Wrap

class	hdf-togglebox hdf-c

HTML Add Class

	hdf-togglebutton-visible
	hdf-togglebutton-visible
selector	.hdf-togglebutton.hdf-c

HTML
<pre><code class="language-c">herr_t H5Pset_coll_metadata_write( hid_t fapl_id, hbool_t is_collective ) </code></pre>

HTML Wrap

class	hdf-togglebox hdf-fortran hdf-togglebox-hidden

HTML Add Class

	hdf-togglebutton-visible
	hdf-togglebutton-visible
selector	.hdf-togglebutton.hdf-fortran

HTML

<pre><code class="language-fortran">Fortran Interface: h5pset_coll_metadata_write_f
 
Signature:
  SUBROUTINE h5pset_coll_metadata_write_f(plist_id, is_collective, hdferr)
    INTEGER(HID_T)  , INTENT(IN)  :: plist_id
    LOGICAL, INTENT(IN)           :: is_collective
    INTEGER, INTENT(OUT)          :: hdferr


Inputs:
  fapl_id        - File access property list identifier.
  is_collective  - Indicates if metadata writes are collective or not.


Outputs:
  hdferr         - Returns 0 if successful and -1 if fails.
        </code></pre>

Hdf rm anchor

AnchorName	parameters

Parameters:

HTML Wrap

class	hdf-rm-section

`hid_t fapl_id`	IN: File access propery list identifier
`hbool_t is_collective`	IN: Boolean value indicating whether metadata writes are collective (`TRUE1`) or independent (`FALSE0`) Default mode: Independent (`FALSE0`)

Hdf rm anchor

AnchorName	description

Description:

HTML Wrap

class	hdf-rm-section

H5P_SET_COLL_METADATA_WRITE tells the HDF5 library whether to perform metadata writes collectively (TRUE1) or independently (FALSE0).

If collective access is selected, then on a flush of the metadata cache, all processes will divide the metadata cache entries to be flushed evenly among themselves and issue a single MPI-IO collective write operation. This is the preferred method when the size of the metadata created by the application is large.

If independent access is selected, the library uses the default method for doing metadata I/O either from process zero or independently from each process.

Hdf rm anchor

AnchorName	returns

Returns:

HTML Wrap

class	hdf-rm-section

Returns a non-negative value if successful; otherwise returns a negative value.

Hdf rm anchor

AnchorName	example

Example:

HTML Wrap

class	hdf-rm-section

Coming Soon!

Comment

HTML Wrap

class	hdf-togglebox hdf-c

Bitbucket Server file

repoSlug	hdf5
branchId	refs/heads/1.10/master
projectKey	HDFFV
filepath	examples/h5_subset.c
showLineNumbers	true
lineStart	32
progLang	cpp
lineEnd	42
applicationLink	5ac7b370-7412-3c8c-ad20-807a68261336

HTML Wrap

class	hdf-togglebox hdf-fortran hdf-togglebox-hidden

Bitbucket Server file

repoSlug	hdf5
branchId	refs/heads/1.10/master
projectKey	HDFFV
filepath	fortran/examples/compound.f90
showLineNumbers	true
lineStart	25
progLang	plain
lineEnd	35
applicationLink	5ac7b370-7412-3c8c-ad20-807a68261336

Hdf rm anchor

AnchorName	history

History:

HTML Wrap

class	hdf-rm-section

Release	Change
1.10.0	C function and Fortran wrapper introduced with this release.

Page tree

Versions Compared

Old Version 4

New Version Current

Key

Procedure:

Signature:

Parameters:

Description:

Returns:

Example:

History:

The HDF Group

Site

Resources

Connect