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)