cache_metadata_size(8) System Manager's Manual cache_metadata_size(8)
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>
System Manager's Manual Device Mapper Tools cache_metadata_size(8)
Generated by dwww version 1.15 on Sat Jun 29 01:37:31 CEST 2024.