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: 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 _______________________________________________ Gluster-users mailing list Gluster-users at gluster.org http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
