System Grab Bag

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Name

cache_dump - dump cache metadata from device or file to standard output.

Synopsis

cache_dump [options] {device|file}

Description

cache_dump dumps binary cache metadata created by the device-mapper cache target on a device or file to standard output for analysis or postprocessing in XML format. XML formatted metadata can be fed into cache_restore in order to put it back onto a metadata device (to process by the device-mapper target), or file.

This tool cannot be run on live metadata.

Options

-h, --help Print help and exit.

-V, --version Print version information and exit.

-r, --repair Repair the metadata whilst dumping it.

-o {xml file} Specify an output file for the xml, rather than printing to stdout.

Examples

Dumps the cache metadata on logical volume /dev/vg/metadata to standard output in XML format:

    $ cache_dump /dev/vg/metadata

Dumps the cache metadata on logical volume /dev/vg/metadata whilst repairing it to standard output in XML format:

    $ cache_dump --repair /dev/vg/metadata

Diagnostics

cache_dump returns an exit code of 0 for success or 1 for error.

See Also

    cache_check(8), cache_repair(8), cache_restore(8)

Author

Joe Thornber <[email protected]>, Heinz Mauelshagen <[email protected]>