GFS2 cluster centOS6

[Unix]

Question for GFS2 Cluster experts!

What is the recommended number (if any) of volumes/files-system can be mounted on nodes using the GFS2 cluster?  We have about 52 mounts wondering if that is ok?

We are having issue with creating new volumes and LVM.  other nodes on the cluster don't see it until either all nodes are fenced or iscsi is restarted which very disruptive.   Any ideas. We have 10 to 12 nodes in our cluster   

Thanks