[Gluster-users] Performance issues with one node

Mathieu Chateau mathieu.chateau at lotp.fr
Thu Jul 30 19:02:59 UTC 2015


Hello,

sorry operating-version is a variable like others, just need to find the
good name: op-version:

gluster volume get all cluster.op-version

then to set version (global to all volumes):
gluster volume set all cluster.op-version 30702


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

2015-07-28 8:03 GMT+02:00 Mathieu Chateau <mathieu.chateau at lotp.fr>:

> Hello,
>
> thanks for this guidance, I wasn't aware of!
>
> Any doc that describe all settings values ?
> For example, I can't find documentation for cluster.lookup-optimize
>
>
> Cordialement,
> Mathieu CHATEAU
> http://www.lotp.fr
>
> 2015-07-27 14:58 GMT+02:00 André Bauer <abauer at magix.net>:
>
>> Some more infos:
>>
>> http://gluster.readthedocs.org/en/latest/Feature%20Planning/GlusterFS%203.7/Small%20File%20Performance/index.html?highlight=small%20file%20performance
>>
>> 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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>> >
>> >
>> >
>> >
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>>
>>
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