Re: Performance of cephfs

[François P-L <lordfpl@xxxxxxxxxxx>]

Hi,

I made the test : I have 3 nodes on Centos 6.3 for mon/mds and 8 nodes under Debian Squeeze with 3.2.0 kernel for osd (each with 1 hd with 1To for osd and the journal on the OS hd) and for mounting cephfs (i know it's very very bad... but i use ceph for a ro filesystem shared on all node of a compute cluster... don't see problem in ro access, and performance are excellent ;)).

All ceph component are in 0.56.4

$ time tar -zxf Joomla_3.0.3-Stable-Full_Package.tar.gz

real    0m20.398s

user    0m0.512s

sys     0m0.720s

On local hd :

$ time tar -zxf Joomla_3.0.3-Stable-Full_Package.tar.gz

real    0m0.356s

user    0m0.348s

sys     0m0.144s

I don't know if it's a usefull test... use iozone & cie for bench is more adequat in my opinion.

---

From: timofey@xxxxxxxxx
Date: Thu, 11 Apr 2013 12:12:31 +0400
To: ceph-users@xxxxxxxxxxxxxx
Subject: Re: Performance of cephfs

Can anybody repeat is test in own production cluster?

2013/4/4 Timofey Koolin <timofey@xxxxxxxxx>

I have centos 6.3 with kernel 3.8.4-1.el6.elrepo.x86_64 from elrepo.org. Cephfs mount with kernel module.

[root@localhost t1]# wget http://joomlacode.org/gf/download/frsrelease/17965/78413/Joomla_3.0.3-Stable-Full_Package.tar.gz

[root@localhost t1]# time tar -zxf Joomla_3.0.3-Stable-Full_Package.tar.gz 

real 8m58.914s

user 0m0.414s

sys 0m0.757s

Same on local file system:

[root@localhost t1]# time tar -zxf Joomla_3.0.3-Stable-Full_Package.tar.gz 

real 0m0.477s

user 0m0.252s

sys 0m0.229s

I have empty cluster with 3 VDS on same host server. Every VDS have 1GB RAM. Have have no any load in this cluster.

Is it normal?

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Blog: www.rekby.ru

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