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Hdf rm anchor
AnchorNamesummary

Excerpt

Stops logging metadata cache events if logging was previously enabled and is currently ongoing

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Hdf rm anchor
AnchorNameprocedure

Procedure:
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H5F_STOP_MDC_LOGGING (file_id)

Hdf rm anchor
AnchorNamesignature

Signature:
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<pre><code class="language-c">herr_t H5Fstop_mdc_logging( hid_t file_id )</code></pre>

Hdf rm anchor
AnchorNameparameters

Parameters:
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hid_t file_id   IN: Identifier of an open HDF5 file

Hdf rm anchor
AnchorNamedescription

Description:
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The metadata cache is a central part of the HDF5 library through which all file metadata reads and writes take place. File metadata is normally invisible to the user and is used by the library for purposes such as locating and indexing data. File metadata should not be confused with user metadata, which consists of attributes created by users and attached to HDF5 objects such as datasets via H5A API calls.

Due to the complexity of the cache, a trace/logging feature has been created that can be used by HDF5 developers for debugging and performance analysis. The functions that control this functionality will normally be of use to a very limited number of developers outside of The HDF Group. The functions have been documented to help users create logs that can be sent with bug reports.

Control of the log functionality is straightforward. Logging is enabled via the H5P_SET_MDC_LOG_OPTIONS function, which will modify the file access property list used to open or create a file. This function has a flag that determines whether logging begins at file open or starts in a paused state. Log messages can then be controlled via the H5F_START_MDC_LOGGING and H5F_STOP_MDC_LOGGING functions. H5P_GET_MDC_LOG_OPTIONS can be used to examine a file access property list, and H5F_GET_MDC_LOGGING_STATUS will return the current state of the logging flags.

The log format is described in the Metadata Cache Logging document.

Note

Logging can only be started or stopped if metadata cache logging was enabled via H5P_SET_MDC_LOG_OPTIONS.

This function only suspends the logging operations. The log file will remain open and will not be closed until the HDF5 file is closed.

Hdf rm anchor
AnchorNamereturns

Returns:
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Returns a non-negative value if successful. Otherwise returns a negative value.

Hdf rm anchor
AnchorNameexample

Example:
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repoSlughdf5
branchIdrefs/heads/1.10/master
projectKeyHDFFV
filepathexamples/h5_subset.c
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lineStart32
progLangcpp
lineEnd42
applicationLink5ac7b370-7412-3c8c-ad20-807a68261336

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Bitbucket Server file
repoSlughdf5
branchIdrefs/heads/1.10/master
projectKeyHDFFV
filepathfortran/examples/compound.f90
showLineNumberstrue
lineStart25
progLangplain
lineEnd35
applicationLink5ac7b370-7412-3c8c-ad20-807a68261336

Hdf rm anchor
AnchorNamehistory

History:
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ReleaseChange
1.10.0C function introduced with this release.