CentOS / Red Hat Enterprise Linux 5.2 Poor NFS Performance and Solution
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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Tags: bugs, centos nfs, CVE-2008-1294, CVE-2008-2136, CVE-2008-2812, enterprise linux, kernel packages, linux nfs, nfs server, red hat enterprise, redhat nfs, rhel 5, server performance, update redhat kernel, update rhel kernel, web server, yum command
Thanks vivek.
If you can post us an article about general Benchmarking and Optimizing NFS that will be very much useful for us.
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Britto
I second that
I’ve been having issues writing to NFS on my Fedora 8 server. Running yum update as I type this. Hopefully this provides a fix.
NFS over TCP is much more faster than UDP