c7813e07e4
Allow people to use their own emitters held in a shared library. Put a trivial emitter in contrib/ as an example.
92 lines
2.6 KiB
Groff
92 lines
2.6 KiB
Groff
.TH THIN_DUMP 8 "Thin Provisioning Tools" "Red Hat, Inc." \" -*- nroff -*-
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.SH NAME
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thin_dump \- dump thin provisioning metadata from device or file to standard output
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.SH SYNOPSIS
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.B thin_dump
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.RB [options]
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.I {device|file}
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.SH DESCRIPTION
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.B thin_dump
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dumps binary thin provisioning metadata (optionally from alternate block;
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see option \-\-metadata-snap) created by the device-mapper
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thin provisioning target on a
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.I device
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or
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.I file
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to standard output for
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analysis or postprocessing in either XML or human readable format.
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XML formated metadata can be fed into thin_restore (see
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.BR thin_restore(8) )
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in order to put it back onto a metadata
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.I device
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(to process by the device-mapper target) or
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.I file.
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This tool cannot be run on live metadata unless the \fB\-\-metadata\-snap\fP option is used.
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.IP "\fB\-f, \-\-format\fP \fI{xml|human_readable|custom}\fP".
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Print output in XML or human readable format. Custom formats are
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supported via shared library plugins. They should be specified as in
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this example:
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.sp
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.B thin_dump --format custom=mylib.so /dev/sda
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.IP "\fB\-r, \-\-repair\fP".
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Repair the metadata whilst dumping it.
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.IP "\fB\-m, \-\-metadata\-snap\fP [block#]".
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Dump metadata snapshot created by device-mapper thin provisioning target.
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If block is not provided, access the default metadata snapshot created by
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the thin provisioning device-mapper target, else try the one at block#.
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See the thin provisioning target documentation on how to create or release
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a metadata snapshot and retrieve the block number from the kernel.
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.IP "\fB\-\-dev\-id\fP <dev-id>".
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Dump the specified device. This option may be specified multiple
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times to select more than one thin device.
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.IP "\fB\-\-skip\-mappings".
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Do not dump the mappings.
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.IP "\fB\-h, \-\-help\fP".
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Print help and exit.
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.IP "\fB\-V, \-\-version\fP".
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Output version information and exit.
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.SH EXAMPLES
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Dumps the thin provisioning metadata on logical volume /dev/vg/metadata
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to standard output in human readable format:
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.sp
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.B thin_dump -f human_readable /dev/vg/metadata
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Dumps the thin provisioning metadata on logical volume /dev/vg/metadata
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to standard output in XML format:
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.sp
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.B thin_dump /dev/vg/metadata
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Dumps the thin provisioning metadata snapshot on logical volume /dev/vg/metadata
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to standard output in human readable format (not processable by
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.B thin_restore(8)
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):
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.sp
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.B thin_dump --format human_readable --metadata-snap /dev/vg/metadata
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.SH DIAGNOSTICS
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.B thin_dump
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returns an exit code of 0 for success or 1 for error.
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.SH SEE ALSO
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.B thin_check(8)
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.B thin_repair(8)
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.B thin_restore(8)
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.B thin_rmap(8)
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.B thin_metadata_size(8)
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.SH AUTHOR
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Joe Thornber <ejt@redhat.com>
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.br
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Heinz Mauelshagen <HeinzM@RedHat.com>
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