[Lustre-discuss] Interpreting stats files
scott.nolin at ssec.wisc.edu
Fri Nov 7 12:48:31 PST 2014
Here's how I understand it:
First number = number of times (samples) the OST has handled a read or
Second number = the minimum read/write size
Third number = maximum read/write size
Fourth = sum of all the read/write requests in bytes, the quantity of
Since this is in the exports area, it's all that per export of course.
I am working on a wiki page for sharing information on stats details
like this which hopefully will be available soon, it's almost ready. It
will include links to tools like lltop, xltop, and also how to roll your
On 11/7/2014 2:29 PM, Dragseth Roy Einar wrote:
> Is there a description of the stats file formats anywhere?
> I'm especially interested in the
> files. For instance, what does the last three numbers on the read_bytes or write_bytes lines mean?
> [root at oss1 ~]# cat /proc/fs/lustre/obdfilter/uit-OST0009/exports/192.168.255.161 at o2ib/stats
> snapshot_time 1415391739.442581 secs.usecs
> read_bytes 365486 samples [bytes] 2720 1048576 363509372808
> write_bytes 12183 samples [bytes] 7384 1048576 12762602232
> preprw 377677 samples [reqs]
> commitrw 377669 samples [reqs]
> ping 832 samples [reqs]
> (I'm trying to create a simple tool to scan all OSSes and detect the worst IO hogs on our system)
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
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