Re: Interesting profile data on tests

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 12/30/2015 10:36 AM, Raghavendra Talur wrote:
This is not comprehensive data but some interesting bits

Average time taken for various commands in our .t files.

* glusterd - 2 second
* gluster vol start/stop - 3 second
* gluster vol set/info(any basic gluster cli command) -1 second
* gluster mount - 2 second
* gluster add brick - 2 second
* gluster remove brick - 5 second
* gluster rebalance start 5 second
* gluster tier attach/detach - 6 second

The only other single command which takes 1+ second is sleep. Most of
the other
external commands we use in bash scripts are not that time taking.


Hence,

1. Don't stop/delete a gluster volume in .t file unless it is part of
your test. Let the cleanup function handle that.
2. Don't call gluster vol info at the start of the test if not required
3. Merge as many tests as possible to reduce glusterd starts/vol starts
and mounts.
4. Use sleep only if it is absolutely required.

You can use this bug https://bugzilla.redhat.com/show_bug.cgi?id=1294826
to send patches to improve test times.


Thank you! These are good set of steps that can help in reducing the overall time consumed for a regression test run. I also think the larger latencies observed in volume operations could be related to the the set of fsync()s involved in making configuration state durable in glusterd's store. It would be interesting to see if we can use a ramdisk for /var/lib/glusterd and check if the latencies would improve.

Regards,
Vijay

_______________________________________________
Gluster-devel mailing list
Gluster-devel@xxxxxxxxxxx
http://www.gluster.org/mailman/listinfo/gluster-devel



[Index of Archives]     [Gluster Users]     [Ceph Users]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux