[Gluster-users] client is terrible with large amount of small files

[Ben Turner]

----- Original Message -----
> From: "gjprabu" <gjprabu at zohocorp.com>
> To: "A Ghoshal" <a.ghoshal at tcs.com>
> Cc: gluster-users at gluster.org, gluster-users-bounces at gluster.org
> Sent: Wednesday, April 29, 2015 9:07:07 AM
> Subject: Re: [Gluster-users] client is terrible with large amount of small files
> 
> Hi Ghoshal,
> 
> Please find the details below.
> 
> A) Glusterfs version
> glusterfs 3.6.2

Upgrade to 3.6.3 and set client.event-threads and server.event-threads to at least 4.  Here is a guide on tuning MT epoll:

https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3/html/Administration_Guide/Small_File_Performance_Enhancements.html

> 
> B) volume configuration (gluster v <volname> info)
> gluster volume info
> 
> 
> Volume Name: integvol
> Type: Replicate
> Volume ID: b8f3a19e-59bc-41dc-a55a-6423ec834492
> Status: Started
> Number of Bricks: 1 x 3 = 3
> Transport-type: tcp
> Bricks:
> Brick1: integ-gluster2:/srv/sdb1/brick
> Brick2: integ-gluster1:/srv/sdb1/brick
> Brick3: integ-gluster3:/srv/sdb1/brick
>
> 
> C) host linux version
> CentOS release 6.5 (Final)

Are your bricks on LVM?  Are you using thinp?  If so update to the latest kernel as thinp perf was really bad in 6.5 and early 6.6 kernels.

> 
> D) details about the kind of network you use to connect your servers making
> up your storage pool.
> We are connecting LAN to LAN there is no special network configuration done
> 
> Frome client we use to mount like below
> mount -t glusterfs gluster1:/integvol /mnt/gluster/
> 
> 
> Regards
> Prabu
> 
> 
> 
> ---- On Wed, 29 Apr 2015 17:58:16 +0530 A Ghoshal<a.ghoshal at tcs.com> wrote
> ----
> 
> 
> 
> Performance would largely depend upon setup. While I cannot think of any
> setup that would cause write to be this slow, if would help if you share the
> following details:
> 
> A) Glusterfs version
> B) volume configuration (gluster v <volname> info)
> C) host linux version
> D) details about the kind of network you use to connect your servers making
> up your storage pool.
> 
> Thanks,
> Anirban
> 
> 
> 
> From: gjprabu < gjprabu at zohocorp.com >
> To: < gluster-users at gluster.org >
> Date: 04/29/2015 05:52 PM
> Subject: Re: [Gluster-users] client is terrible with large amount of small
> files
> Sent by: gluster-users-bounces at gluster.org
> 
> 
> 
> 
> Hi Team,
> 
> If anybody know the solution please share us.
> 
> Regards
> Prabu
> 
> 
> 
> ---- On Tue, 28 Apr 2015 19:32:40 +0530 gjprabu < gjprabu at zohocorp.com >
> wrote ----
> Hi Team,
> 
> We are using glusterfs newly and testing data transfer part in client using
> fuse.glusterfs file system but it is terrible with large amount of small
> files (Large amount of small file 150MB of size it's writing around 18min).
> I can able copy small files and syncing between the server brick are working
> fine but it is terrible with large amount of small files.
> 
> if anybody please share the solution for the above issue.
> 
> Regards
> Prabu
> 
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