[Gluster-users] Performance issues with one node

[Mathieu Chateau]

Hello,

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

Cordialement,
Mathieu CHATEAU
http://www.lotp.fr

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>