[Gluster-users] Poor Gluster performance

Ben Turner bturner at redhat.com
Wed Feb 18 21:05:01 UTC 2015

----- Original Message -----
> From: "Lars Hanke" <debian at lhanke.de>
> To: gluster-users at gluster.org
> Sent: Wednesday, February 18, 2015 3:01:54 PM
> Subject: [Gluster-users] Poor Gluster performance
> I set up a distributed, replicated volume consisting of just 2 bricks on
> two physical nodes. The nodes are peered using a dedicated GB ethernet
> and can be accessed from the clients using a separate GB ethernet NIC.
> Doing a simple dd performance test I see about 11 MB/s for read and
> write. Running a local setup, i.e. both bricks on the same machine and
> local mount, I saw even 500 MB/s. So network sould be the limiting
> factor. But using NFS or CIFS on the same network I see 110 MB/s.
> Is gluster 10 times slower than NFS?

Something is going on there.  On my gigabit setups I see 100-120 MB / sec writes for pure distribute and about 45-55 MB / sec with replica 2.  What block size are you using?  I could see that if you were writing something like 4k or under but 64k and up you should be getting about what I said.  Can you tell me more about your test?


> Gluster version is 3.6.2.
> Thanks for your help,
>   - lars.
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