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cache_dump(8) System Manager's Manual cache_dump(8)

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

Print help and exit.
Print version information and exit.
Repair the metadata whilst dumping it.
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 <ejt@redhat.com>, Heinz Mauelshagen <HeinzM@RedHat.com>

Device Mapper Tools System Manager's Manual