We have a very simple GlusterFS setup as our mail server files storage. We
are facing problem with the performance, you can see I/O wait if very high.
We are quite new to GlusterFS, could someone helps? Thank a lot.
=========version============[root at g1 ~]# glusterfsd --version
glusterfs 3.5.0 built on Apr 23 2014 12:53:55
[root at g2 ~]# glusterfsd --version
glusterfs 3.5.0 built on Apr 23 2014 12:53:55
==========volume info=========[root at g1 ~]# gluster volume info
Volume Name: GFSv1-data
Type: Replicate
Volume ID: c8902563-fb57-4549-9bfe-fb49c1f4182d
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: g1.i-admin.com:/GlusterFS/data
Brick2: g2.i-admin.com:/GlusterFS/data
Options Reconfigured:
auth.allow: 192.168.3.*
[root at g2 ~]# gluster volume info
Volume Name: GFSv1-data
Type: Replicate
Volume ID: c8902563-fb57-4549-9bfe-fb49c1f4182d
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: g1.i-admin.com:/GlusterFS/data
Brick2: g2.i-admin.com:/GlusterFS/data
Options Reconfigured:
auth.allow: 192.168.3.*
==========I/O wait - g1 =============
top - 14:20:39 up 122 days, 3:02, 3 users, load average: 17.31, 16.13,
14.51
Tasks: 117 total, 2 running, 115 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2%us, 0.3%sy, 0.0%ni, 0.0%id, 99.5%wa, 0.0%hi, 0.0%si,
0.0%st
Mem: 3802844k total, 3598252k used, 204592k free, 1844472k buffers
Swap: 3948536k total, 696k used, 3947840k free, 1048028k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
12583 root 20 0 1162m 39m 2912 S 1.0 1.1 23:20.09 glusterfsd
12 root 20 0 0 0 0 R 0.3 0.0 2:32.30 events/1
1 root 20 0 19232 608 432 S 0.0 0.0 0:00.48 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 0:00.30 migration/0
==========I/O wait - g2 =============
top - 14:14:00 up 121 days, 21:24, 3 users, load average: 10.93, 9.45,
9.09
Tasks: 117 total, 1 running, 116 sleeping, 0 stopped, 0 zombie
Cpu(s): 6.0%us, 6.7%sy, 0.0%ni, 0.2%id, 87.1%wa, 0.0%hi, 0.0%si,
0.0%st
Mem: 3737300k total, 3506328k used, 230972k free, 1597872k buffers
Swap: 3948536k total, 936k used, 3947600k free, 1183916k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4841 root 20 0 1166m 45m 2968 S 26.0 1.2 9:49.25 glusterfsd
22 root 20 0 0 0 0 S 0.3 0.0 1:12.73 kblockd/0
1 root 20 0 19232 700 516 S 0.0 0.0 0:00.80 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.06 kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 0:00.34 migration/0
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