[Gluster-users] parallel-readdir is not recognized in GlusterFS 3.12.4

[Raghavendra Gowdappa]

----- Original Message -----
> From: "Alan Orth" <alan.orth at gmail.com>
> To: "Raghavendra Gowdappa" <rgowdapp at redhat.com>
> Cc: "gluster-users" <gluster-users at gluster.org>
> Sent: Tuesday, January 30, 2018 1:37:40 PM
> Subject: Re: [Gluster-users] parallel-readdir is not recognized in GlusterFS	3.12.4
> 
> Thank you, Raghavendra. I guess this cosmetic fix will be in 3.12.6?

Yes.

> 
> I'm also looking forward to seeing stability fixes to parallel-readdir and or
> readdir-ahead in 3.12.x. :)

I am not sure what caused disconnects. readdir-ahead shouldn't result in purging of connections. We've not seen this behavior in our internal tests (We have done quite a significant amount of testing on this to ascertain performance impact). We need to investigate this. Can you file a bug on this providing following information:
* log files of client and brick process
* test-case to reproduce the issue.
* Test environment (OS, volume profile info etc).

regards,
Raghavendra
> 
> Cheers,
> 
> On Mon, Jan 29, 2018 at 9:26 AM Raghavendra Gowdappa < rgowdapp at redhat.com >
> wrote:
> 
> 
> 
> 
> ----- Original Message -----
> > From: "Pranith Kumar Karampuri" < pkarampu at redhat.com >
> > To: "Alan Orth" < alan.orth at gmail.com >
> > Cc: "gluster-users" < gluster-users at gluster.org >
> > Sent: Saturday, January 27, 2018 7:31:30 AM
> > Subject: Re: [Gluster-users] parallel-readdir is not recognized in
> > GlusterFS 3.12.4
> > 
> > Adding devs who work on it
> > 
> > On 23 Jan 2018 10:40 pm, "Alan Orth" < alan.orth at gmail.com > wrote:
> > 
> > 
> > 
> > Hello,
> > 
> > I saw that parallel-readdir was an experimental feature in GlusterFS
> > version
> > 3.10.0, became stable in version 3.11.0, and is now recommended for small
> > file workloads in the Red Hat Gluster Storage Server documentation[2]. I've
> > successfully enabled this on one of my volumes but I notice the following
> > in
> > the client mount log:
> > 
> > [2018-01-23 10:24:24.048055] W [MSGID: 101174]
> > [graph.c:363:_log_if_unknown_option] 0-homes-readdir-ahead-1: option
> > 'parallel-readdir' is not recognized
> > [2018-01-23 10:24:24.048072] W [MSGID: 101174]
> > [graph.c:363:_log_if_unknown_option] 0-homes-readdir-ahead-0: option
> > 'parallel-readdir' is not recognized
> > 
> 
> This is fixed by patch:
> https://review.gluster.org/#/c/18572/
> 
> Please note that the log message is harmless and parallel-readdir is enabled
> even with this log. You can verify that by looking into gluster volume
> configuration logged in glusterfs logs. If parallel-readdir is enabled, you
> should see a readdir-ahead translator loaded as a parent of each DHT
> subvolume.
> 
> > The GlusterFS version on the client and server is 3.12.4. What is going on?
> > 
> > [0]
> > https://github.com/gluster/glusterfs/blob/release-3.10/doc/release-notes/3.10.0.md
> > [1]
> > https://github.com/gluster/glusterfs/blob/release-3.11/doc/release-notes/3.11.0.md
> > [2]
> > https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.3/html/administration_guide/small_file_performance_enhancements
> > 
> > Thank you,
> > 
> > 
> > --
> > 
> > 
> > Alan Orth
> > alan.orth at gmail.com
> > https://picturingjordan.com
> > https://englishbulgaria.net
> > https://mjanja.ch
> > 
> > _______________________________________________
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> > Gluster-users at gluster.org
> > http://lists.gluster.org/mailman/listinfo/gluster-users
> > 
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> --
> 
> 
> Alan Orth
> alan.orth at gmail.com
> https://picturingjordan.com
> https://englishbulgaria.net
> https://mjanja.ch
> 
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