This is the command pcp-dmcache that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
pcp-dmcache, pcp-lvmcache - report on logical storage device caches
SYNOPSIS
pcp dmcache [-i/--iops] [-R/--repeat N] [device ...]
DESCRIPTION
pcp-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 options become indirectly
available.
By default, pcp-dmcache reports on all available cache target devices (one line each, per
sample), but this can be restricted to specific devices on the command line.
OPTIONS
Additional 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.
-R/--repeat changes the frequency at which the column heading is displayed. By default, a
header is displayed after every tenth sample.
Use pcp-dmcache online using onworks.net services
