On 10/09/2014 12:40 AM, Stan Hoeppner wrote:
Does anyone know of a utility that can track writes to files in an
XFS directory tree, or filesystem wide for that matter, and gather
filesystem blocks written per second data, or simply KiB/s, etc? I
need to analyze an application's actual IO behavior to see if it
matches what I'm being told the application is supposed to be doing.
We've written a few for this purpose (local IO probing).
Start with collectl (looks at /proc/diskstats), and others. Our tools
go to /proc/diskstats, and use this to compute BW and IOPs per device.
If you need to log it for a long time, set up a time series database (we
use influxdb and the graphite plugin). Then grab your favorite metrics
tool that talks to graphite/influxdb (I like
https://github.com/joelandman/sios-metrics for obvious reasons), and
start collecting data.
Thanks, Stan
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