[Gluster-users] Performance issues with one node

André Bauer abauer at magix.net
Mon Jul 27 12:58:37 UTC 2015

Some more infos:

Am 24.07.2015 um 20:15 schrieb 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
> <mailto: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 <http://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.
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André Bauer

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