Advice with cluster filesystems / web server cluster

Hi,

I'd like to ask to you sysadmin redditors if you have experience in this subject. We have an iSCSI storage (Dell MD3000i) and for a couple of years we've used OCFS2 1.2 so we can access the same files simultaneously from two web servers. However we had some problems with that platform (poor performance, server hangs for no apparent reason) and we're looking for alternatives.

Right now I'm testing the latest version of OCFS2 bundled in SuSE 11 and GFS2 with CentOS 6 with results that favors OCFS2 so far, however I'd like to know if you had experience in this subject (web server cluster) and could share some best practices.

Thanks in advice!