44 lines
1.2 KiB
Groff
44 lines
1.2 KiB
Groff
.TH CACHE_METADATA_SIZE 8 "Thin Provisioning Tools" "Red Hat, Inc."
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.SH NAME
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cache_metadata_size \- Estimate the size of the metadata device needed for a given configuration
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.SH SYNOPSIS
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.B cache_metadata_size
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.RB [ options ]
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.SH DESCRIPTION
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.B cache_metadata_size
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estimates the size of the metadata. Either \-\-nr\-blocks, or \-\-block\-size
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and \-\-device\-size must be specified.
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.SH OPTIONS
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.IP "\fB\-\-nr\-blocks\fP \<natural\>"
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Specify the number of cache blocks.
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.IP "\fB\-\-block-size\fP \<sectors\>"
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Specify the size of each cache block in 512 byte sectors.
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.IP "\fB\-\-device\-size\fP \<sectors\>"
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Specify total size of the fast device used in the cache. In 512 byte sectors.
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.IP "\fB\-\-max\-hint\-width\fP \<nr bytes\>"
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Cache policies use a per block 'hint' to record extra info (for instance hit
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counts). At the moment all policies use a 4 byte hint width. If you want to use
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a different hint width specify it with this switch.
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.SH EXAMPLE
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.B cache_metadata_size --nr-blocks 10240
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.sp
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.B cache_metadata_size --block-size 128 --device-size 1024000
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.SH SEE ALSO
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.B cache_dump(8)
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.B cache_repair(8)
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.B cache_restore(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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