[Gluster-devel] Disperse volume performance improvement using clients-io-theads

[Atin Mukherjee]

On Mon, Aug 22, 2016 at 10:09 AM, jayakrishnan mm <jayakrishnan.mm at gmail.com
> wrote:

> Hi,
> Glusterfs Ver: 3.7.6
>
> 1) Currently I am using disperse  volume  and its performance is not
> satisfactory.
>  So I tried  "sudo gluster v set ec-vol performance.client-io-threads on"
> (as per https://bugzilla.redhat.com/show_bug.cgi?id=1349953)
>
> on the volume . But  I am getting
> Connection failed. Please check if gluster daemon is operational.  error.
>

Ideally, this indicates that CLI is not able to talk to GlusterD as it the
latter could be down. Are you sure GlusterD was up by the time you executed
this command? If yes, please attach the cmd_history and cli log.


>
> volume info
>
> Volume Name: ec-vol
> Type: Disperse
> Volume ID: 66d9f9e9-8bbd-46d8-b491-5b3e48219ee1
> Status: Started
> Number of Bricks: 1 x (4 + 2) = 6
> Transport-type: tcp
> Bricks:
> Brick1: jk:/home/jk/gluster/brick1
> Brick2: jk:/home/jk/gluster/brick2
> Brick3: jk:/home/jk/gluster/brick3
> Brick4: jk:/home/jk/gluster/brick4
> Brick5: jk:/home/jk/gluster/brick5
> Brick6: jk:/home/jk/gluster/brick6
> Options Reconfigured:
> performance.readdir-ahead: on
>
>
> Attached  the  log.
>
> How  to resolve this error ?
>
> 2) If I replace  the Erasure code algorithm  in the EC  with a simpler one
> , will  it  give a better performance ?  What is  the real bottleneck ?
>
>
> Best Regards
> JK
>
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>



-- 

--Atin
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