cache_metadata_size
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLE
SEE ALSO
AUTHOR
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