[Gluster-users] Performance issues with one node

Mathieu Chateau mathieu.chateau at lotp.fr
Fri Jul 24 18:15:03 UTC 2015


gluster performance are not good with large number of small files. Recent
version do a better job with them, but not yet what I would enjoy.

As you are starting at gluster having an existing architecture, you should
first setup a lab to learn about it Else you will learn the hard way.
Don't play with turning off nodes, as you may create more issues than solve.

just my 2cents


2015-07-24 19:34 GMT+02:00 John Kennedy <skebi69 at gmail.com>:

> I am new to Gluster and have not found anything useful from my friend
> Google. I have not dealt with physical hardware in a few years (my last few
> jobs have been VM's and AWS based)
> I inherited a 4 node gluster configuration. There are 2 bricks, one is 9TB
> the other 11TB.
> The 11TB brick has a HUGE number of small files taking up only 1.3TB of
> the brick. For some reason, even a simple ls command can take hours to even
> start listing files. I removed a node by shutting down gluster on that
> node. The change in performance is dramatic. If I try and do ls on the 11TB
> brick on the downed node, I am still getting the slow response. I have
> narrowed the issue down to this one node as a result.
> When I start gluster on the bad node, glusterfsd hits over 1000%CPU use
> (The server has dual 8 core CPU's) and the load will jump to 25-30 within 5
> minutes. As such, I think this is a gluster issue and not a hardware issue.
> I am trying to not reinstall gluster yet.
> Is there something I am missing in my checks or will I need to reinstall
> gluster on that node?
> Thanks,
> John
> John Kennedy  (_8(|)
> Sometimes it happens, sometimes it doesn't - Pedro Catacora
> Just because nobody disagrees with you doesn't mean you are correct.
> Anatidaephobia is the fear that somehow, somewhere a duck is watching you
> - urbandictionary.com
> The Dunning-Kruger effect occurs when incompetent people not only fail to
> realize their incompetence, but consider themselves much more competent
> than everyone else. Basically - they're too stupid to know that they're
> stupid.
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.gluster.org/pipermail/gluster-users/attachments/20150724/4895dfff/attachment.html>

More information about the Gluster-users mailing list