Red Hat Training
A Red Hat training course is available for Red Hat Enterprise Linux
2.8. Performance Issues: Check the Red Hat Customer Portal
For information on best practices for deploying and upgrading Red Hat Enterprise Linux clusters using the High Availability Add-On and Red Hat Global File System 2 (GFS2) see the article "Red Hat Enterprise Linux Cluster, High Availability, and GFS Deployment Best Practices" on Red Hat Customer Portal at https://access.redhat.com/site/articles/40051.