thin-provisioning-tools/man8/thin_metadata_size.8

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.TH THIN_METADATA_SIZE 8 "Thin Provisioning Tools" "Red Hat, Inc." \" -*- nroff -*-
.SH NAME
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thin_metadata_size \- thin provisioning metadata device/file size calculator.
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.SH SYNOPSIS
.B thin_metadata_size
.RB [ options ]
.SH DESCRIPTION
.B thin_metadata_size
calculates the size of the thin provisioning metadata based on the block size
of the thin provisioned devices, the size of the thin provisioning pool and
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the maximum number of all thin prisioned devices and snapshots.
Because thin provisioning pools are holding widely variable contents,
this tool is needed to provide sensible initial default size.
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.IP "\fB\-b, \-\-block-size\fP \fIBLOCKSIZE[bskKmMgGtTpPeEzZyY]\fP"
Block size of thin provisioned devices in units of bytes,sectors,kilobytes,kibibytes,... respectively.
Default is in sectors without a block size unit specifier.
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Size/number option arguments can be followed by unit specifiers in short one character
and long form (eg. -b1m or -b1megabytes).
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.IP "\fB\-s, \-\-pool-size\fP \fIPOOLSIZE[bskKmMgGtTpPeEzZyY]\fP"
Thin provisioning pool size in units of bytes,sectors,kilobytes,kibibytes,... respectively.
Default is in sectors without a pool size unit specifier.
.IP "\fB\-m, \-\-max-thins\fP \fI#[bskKmMgGtTpPeEzZyY]\fP"
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.
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.IP "\fB\-u, \-\-unit\fP \fI{bskKmMgGtTpPeEzZyY}\fP"
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Output unit specifier in units of bytes,sectors,kilobytes,kibibytes,... respectively.
Default is in sectors without an output unit specifier.
.IP "\fB\-n, \-\-numeric-only [short|long]\fP"
Limit output to just the size number with the optional unit specifier character/string.
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.IP "\fB\-h, \-\-help\fP"
Print help and exit.
.IP "\fB\-V, \-\-version\fP"
Output version information and exit.
.SH EXAMPLES
Calculates the thin provisioning metadata device size for block size 64 kilobytes,
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pool size 1 terabytes and maximum number of thin provisioned devices and snapshots of 1000
in units of sectors with long output:
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.sp
.B thin_metadata_size -b64k -s1t -m1000
Or (using the long options instead) for block size 1 gigabyte, pool size 1 petabytes and maximum number of thin provisioned devices
and snapshots of 1 million with numeric only output in units of gigabytes:
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.sp
.B 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 character appended:
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.sp
.B thin_metadata_size --block-size=1giga --pool-size=1petabytes --max-thins=1mebi --unit=g --numeric-only=short
Or with unit specifier string appended:
.sp
.B thin_metadata_size --block-size=1giga --pool-size=1petabytes --max-thins=1mebi --unit=g -nlong
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.SH DIAGNOSTICS
.B thin_metadata_size
returns an exit code of 0 for success or 1 for error.
.SH SEE ALSO
.B thin_dump(8)
.B thin_check(8)
.B thin_repair(8)
.B thin_restore(8)
.B thin_rmap(8)
.SH AUTHOR
Joe Thornber <ejt@redhat.com>
.br
Heinz Mauelshagen <HeinzM@RedHat.com>