thin_metadata_size(8)thin_metadata_size(8)NAMEthin_metadata_size - thin provisioning metadata device/file size calcu‐
lator.
SYNOPSISthin_metadata_size [options]
DESCRIPTIONthin_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
DIAGNOSTICSthin_metadata_size returns an exit code of 0 for success or 1 for
error.
SEE ALSOthin_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)
