pcp-dmcache (1) - Linux Man Pages
pcp-dmcache: report on logical storage device caches
NAMEpcp-dmcache, pcp-lvmcache - report on logical storage device caches
SYNOPSISpcp [pcp options] dmcache [-i/--iops] [-R/--repeat N] [device ...]
DESCRIPTIONpcp-dmcache reports on the activity of any configured Device Mapper Cache targets. The reported information includes device IOPs, cache and metadata device utilization, as well as hit and miss rates and ratios for both reads and writes for each cache device.
pcp-lvmcache (Logical Volume Manager cache) is an exact synonym for pcp-dmcache (Device Mapper cache).
When invoked via the pcp(1) command, the -h/--host, -a/--archive, -O/--origin, -s/--samples, -t/--interval, -Z/--timezone and several other pcp options become indirectly available.
OPTIONSAdditional options are available for changing the output displayed by pcp-dmcache.
-i/--iops displays total read and write operations instead of the default cache hit ratio.