Freddy,
If there is high iowait, the easiest way is to add more disks. With huge RAM and
fast CPUs, the typical bottleneck that I have seen on scale out systems are
disks and network.
How many disks are you striping you volume ( lun ) across per server ?
Regards,
Tejas.
----- Original Message -----
From: "Freddy Morgenstern" <fmorgenstern at icarnegie.com>
To: gluster-users at gluster.org
Sent: Monday, August 2, 2010 8:57:57 PM
Subject: [Gluster-users] GlusterFS CPU hit
Hi,
I am a GlusterFS newbee and I am experiencing the following problem: whenever I
run the top command a process called glusterfsd is using over 15% of the CPU at
all times and my %wa is usually over 15%. I find the %wa particularly worrisome
because it's my understanding that this means that the cpu has to wait a
very long time each time it requests data to the hard drive.
Can you please tell me if the high CPU ussage is normal behavior of glusterFS,
if the high %wa could be caused by glusterFS and if so is there any way I can
optimize/tune my server to eliminate the problem?
System Configuration:
- GlusterFS 2.0.8-1
- RAID 1 SATA disk arrays
- CentOS
I appreciate any help you can give me.
Thanks and Regards,
Freddy
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