"Have you ever tried to let multiple nodes write to the same shares file system concurrently? That won't work on normal file systems. The cluster file system, OCFS2, allows you to do just that. Using OCFS2, you will benefit from greater flexibility in setting up a cluster environment. In this article, you'll learn how to set it up in a SUSE Linux Enterprise Server (SLES) 10 environment.
"First of all, you don't have to use OCFS2 for all cluster resources. It all depends on what you are doing with the resources. If you configure the resources in an active/passive configuration, where only one instance of the resource is active at any given time, you don't need OCFS2. In that case, it's better to use ext3 instead..."
