thin_metadata_size(8) System Manager's Manual thin_metadata_size(8)
NAME
thin_metadata_size - thin provisioning metadata device/file size calcu-
lator.
SYNOPSIS
thin_metadata_size [options]
DESCRIPTION
thin_metadata_size calculates the size of the thin provisioning meta-
data based on the block size of the thin provisioned devices, the size
of the thin provisioning pool and the maximum number of all thin provi-
sioned devices and snapshots. Because thin provisioning pools are hold-
ing widely variable contents, this tool is needed to provide sensible
initial default size.
OPTIONS
-h, --help
Print help and exit.
-V, --version
Print version information and exit.
-b, --block-size {BLOCKSIZE[bskKmMgGtTpPeEzZyY]}
Set block size.
Block size of thin provisioned devices in units of bytes, sectors,
kibibytes, kilobytes, ... respectively. Default is in sectors without a
block size unit specifier. Size/number option arguments can be followed by
unit specifiers in short one character and long form (eg. -b1m or
-b1mebibytes).
-s, --pool-size {POOLSIZE[bskKmMgGtTpPeEzZyY]}
Set pool size.
Thin provisioning pool size in units of bytes, sectors, kibibytes,
kilobytes, ... respectively. Default is in sectors without a pool size
unit specifier.
-m, --max-thins {count[bskKmMgGtTpPeEzZyY]}
Set max thins.
Maximum sum of all thin provisioned devices and snapshots. Unit identifier
supported to allow for convenient entry of large quantities, eg. 1000000 =
1M. Default is absolute quantity without a number unit specifier.
-u, --unit {bskKmMgGtTpPeEzZyY}
Output unit specifier in units of bytes, sectors, kibibytes, kilobytes, ...
respectively. Default is in sectors without an output unit specifier.
-n, --numeric-only {short|long}
Limit output to just the size number.
EXAMPLES
Calculates the thin provisioning metadata device size for block size 64
kibibytes, pool size 1 tebibytes and maximum number of thin provisioned
devices and snapshots of 1000 in units of sectors with long output:
$ thin_metadata_size -b64k -s1t -m1000
Or (using the long options instead) for block size 1 gibibyte, pool
size 1 petabyte and maximum number of thin provisioned devices and
snapshots of 1 million with numeric-only output in units of gigabytes:
$ thin_metadata_size --block-size=1g --pool-size=1P --max-thins=1M --unit=G --numeric-only
Same as before (1g, 1P, 1M, numeric-only) but with unit specifier char-
acter appended:
$ thin_metadata_size --block-size=1gibi --pool-size=1petabytes --max-thins=1mega --unit=G --numeric-only=short
Or with unit specifier string appended:
$ thin_metadata_size --block-size=1gibi --pool-size=1petabytes --max-thins=1mega --unit=G -nlong
DIAGNOSTICS
thin_metadata_size returns an exit code of 0 for success or 1 for er-
ror.
SEE ALSO
thin_dump(8), thin_check(8), thin_repair(8), thin_restore(8),
thin_rmap(8)
AUTHOR
Joe Thornber <ejt@redhat.com>, Heinz Mauelshagen <HeinzM@RedHat.com>
System Manager's Manual Device Mapper Tools thin_metadata_size(8)
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