Glen Lumanau » redhat http://lumanau.web.id About Glen Lumanau Fri, 23 Jul 2010 10:08:00 +0000 hourly 1 http://wordpress.org/?v=3.0 CentOS / Red Hat Enterprise Linux 5.2 Poor NFS Performance and Solution http://lumanau.web.id/2009/01/08/centos-red-hat-enterprise-linux-52-poor-nfs-performance-and-solution.html http://lumanau.web.id/2009/01/08/centos-red-hat-enterprise-linux-52-poor-nfs-performance-and-solution.html#comments Thu, 08 Jan 2009 10:18:23 +0000 admin http://www.lumanau.web.id/?p=127 A few days ago I noticed that NFS performance between a web server node and NFS server went down by 50%. NFS was optimized and the only thing was updated Red Hat kernel v5.2. I also noticed same trend on CentOS 5.2 64 bit edition.

NFS server crashed each and every time web server node tried to store a large file 20-100 MB each. Read performance was fine but write performance went to hell. Finally, I had to rollback the updates. Recently, while reading Red Hat site I came across the solution.

Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 5:

* a 50-75% drop in NFS server rewrite performance, compared to Red Hat
Enterprise Linux 4.6, has been resolved.

After upgrading kernel on both server and client my issue resolved:

# yum update

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