1cache_metadata_size(8)      System Manager's Manual     cache_metadata_size(8)
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NAME

6       cache_metadata_size  -  Estimate the size of the metadata device needed
7       for a given configuration.
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SYNOPSIS

10       cache_metadata_size [options]
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DESCRIPTION

14       cache_metadata_size estimates the size of the metadata.
15              Either --nr-blocks, or --block-size and  --device-size  must  be
16              specified.
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OPTIONS

19       --nr-blocks {natural}
20              Specify the number of cache blocks.
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22       --block-size {sectors}
23              Specify the size of each cache block in 512 byte sectors.
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25       --device-size {sectors}
26              Specify total size of the fast device used in the cache.  In 512
27              byte sectors.
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29       --max-hint-width {nr bytes}
30              Specify hint width.
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32           Cache policies use a per block 'hint' to record extra info (for instance
33           hit counts).  At the moment all policies use a 4 byte hint
34           width.  If you want to use a different hint width specify it with this
35           switch.
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EXAMPLE

39       $ cache_metadata_size --nr-blocks 10240
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41       $ cache_metadata_size --block-size 128 --device-size 1024000
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SEE ALSO

44       cache_dump(8), cache_repair(8), cache_restore(8)
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AUTHOR

47       Joe Thornber <ejt@redhat.com>, Heinz Mauelshagen <heinzm@redhat.com>
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51System Manager's Manual       Device Mapper Tools       cache_metadata_size(8)