33 lines
1.1 KiB
Plaintext
33 lines
1.1 KiB
Plaintext
NAME
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cache_metadata_size - Estimate the size of the metadata device needed for a given configuration.
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SYNOPSIS
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cache_metadata_size [options]
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DESCRIPTION
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cache_metadata_size estimates the size of the metadata. Either --nr-blocks,
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or --block-size and --device-size must be specified.
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OPTIONS
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--nr-blocks {natural} Specify the number of cache blocks.
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--block-size {sectors} Specify the size of each cache block in 512 byte sectors.
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--device-size {sectors} Specify total size of the fast device used in the cache. In 512 byte sectors.
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--max-hint-width {nr bytes} Specify hint width.
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Cache policies use a per block 'hint' to record extra info (for instance
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hit counts). At the moment all policies use a 4 byte hint
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width. If you want to use a different hint width specify it with this
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switch.
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EXAMPLE
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$ cache_metadata_size --nr-blocks 10240
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$ cache_metadata_size --block-size 128 --device-size 1024000
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SEE ALSO
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cache_dump(8), cache_repair(8), cache_restore(8)
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AUTHOR
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Joe Thornber <ejt@redhat.com>, Heinz Mauelshagen <heinzm@redhat.com>
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