[Gluster-users] performance tuning - list of available options?

[Ben Turner]

----- Original Message -----
> From: "Mohammed Rafi K C" <rkavunga at redhat.com>
> To: "Vijay Bellur" <vbellur at redhat.com>, "Kingsley" <gluster at gluster.dogwind.com>, gluster-users at gluster.org,
> "Raghavendra Gowdappa" <rgowdapp at redhat.com>
> Sent: Tuesday, May 5, 2015 9:09:31 AM
> Subject: Re: [Gluster-users] performance tuning - list of available options?
> 
> 
> 
> On 05/05/2015 05:24 PM, Vijay Bellur wrote:
> > On 05/05/2015 04:34 PM, Kingsley wrote:
> >> On Tue, 2015-05-05 at 15:08 +0530, Vijay Bellur wrote:
> >> [snip]
> >>> I have seen this before and it primarily seems to be related to the
> >>> readdir calls done by git clone.
> >>>
> >>> Turning on these options might help to some extent:
> >>>
> >>> gluster volume set <volname> performance.readdir-ahead on
> >>>
> >>> gluster volume set <volname> cluster.readdir-optimize on
> >>
> >> Is there a list of all performance tuning options, and a description of
> >> what they do? Even better if it details pros/cons of using a particular
> >> option, or circumstances in which you might want to use it.
> >>
> >> If such a list exists, it would be very useful. I've tried googling but
> >> can only find pages for very old versions (eg gluster 3.2) and only
> >> detailing /some/ options.
> >>
> >> Knowing what the value defaults to would also be handy. In a separate
> >> thread, someone advised me to do "gluster volume set <VOLNAME>
> >> performance.flush-behind off", but when I found that didn't help (the
> >> issue turned out to be something I was doing, not a fault in gluster) I
> >> couldn't figure out what the default value was, so I didn't know whether
> >> to leave it off, or whether it had previously been on.
> >>
> >> Is there anything available?
> >
> >
> > Thanks for this feedback. This is something that I would like to see
> > captured too.
> >
> > Raghavendra, Rafi - would you be able to help create a document on
> > this one?
> I would be happy to contribute for this, but I can only spend time after
> 3.7 release :-) .
> 
> Along with the performance turning guide, we can also enhance our
> development guide.

I have some ideas here, happy to help.

-b

> 
> Rafi KC
> >
> > -Vijay
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
>