cache_dump (8) Linux Manual Page
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 <ejt [at] redhat.com>, Heinz Mauelshagen <HeinzM [at] RedHat.com>