NAME
  cache_metadata_size - Estimate the size of the metadata device needed for a given configuration.

SYNOPSIS
  cache_metadata_size [options]

DESCRIPTION
  cache_metadata_size estimates the size of the metadata.  Either --nr-blocks,
  or --block-size and --device-size must be specified.

OPTIONS
  --nr-blocks {natural}		Specify the number of cache blocks.
  --block-size {sectors}	Specify the size of each cache block in 512 byte sectors.
  --device-size {sectors}	Specify total size of the fast device used in the cache.  In 512 byte sectors.
  --max-hint-width {nr bytes}	Specify hint width.

    Cache policies use a per block 'hint' to record extra info (for instance
    hit counts).  At the moment all policies use a 4 byte hint
    width.  If you want to use a different hint width specify it with this
    switch.

EXAMPLE
    $ cache_metadata_size --nr-blocks 10240

    $ cache_metadata_size --block-size 128 --device-size 1024000

SEE ALSO
  cache_dump(8), cache_repair(8), cache_restore(8)

AUTHOR
  Joe Thornber <ejt@redhat.com>, Heinz Mauelshagen <heinzm@redhat.com>