[Gluster-users] Improving afr performance

Paras Fadte plfgoa at gmail.com
Fri Nov 20 06:35:14 UTC 2009

Hi Vikas,

Thanks for the response.

I am having performance issues upon migration to gluster. Follwoing
should explain the issue.

There are scripts running which access data from the gluster mount
point . Earlier NFS was used . With NFS the scripts seem to have no
problem getting completed faster but when same scripts run accessing
same data from gluster  it runs about 3-4 times  slower .  Mostly the
scripts do stat/unlinking/renaming operations on files. Number of
files would be roughly 25k withe average file size 40KB . What can be
done to increase the speed/performance ?

Regarding stat-prefetch is the following usage correct ?

volume afr
 type cluster/replicate
 subvolumes A B

volume stat-prefetch
  type performance/stat-prefetch
  subvolumes afr

Thank you.


On Fri, Nov 20, 2009 at 1:42 AM, Vikas Gorur <vikas at gluster.com> wrote:
> Paras Fadte wrote:
>> Hi,
>> Which  settings in AFR in  gluster directly affects performance when
>> there are lots of "ls" and "stat" calls made on files mounted using
>> gluster?
> There isn't any setting in afr that can affect ls or stat performance. You
> can load
> the stat-prefetch translator above afr to increase ls/stat performance.
> Vikas

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