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Can please describe a bit more what you have?
What app use it, underlying disk came from SAN,SAS,SATA,iSCSI remote/local ?
you want to avoid having Lun -> OCFS2 in the OracleVM -> Disk.img -> OCFS2 in the virtual guest
if that's the case, you may want to go to:
Lun -> unused at OracleVM -> phy:// -> OCFS2 in the virtual guest
I have worked in a company where we had a 12 nodes cluster, real boxes having fast storage, and we hit 3 episodes of random reboots / locks.
The fixes were
- available ram .. we run couple of times that system starting to page, and this caused the hung/reboots
- tweak /etc/sysconfig/o2cb timeouts, as defaults one were a bit short
- don't mix speed of storage.
At some point, for backup, we got a storage made of SATA, what was a cheap solution but proven cause issues in this cluster.
what Oracle/cluster version ??
I have successfully used ACFS (a cluster file system that "lives" in an ASM Diskgroup - and is expandable online - think of ASM in this case as a Volume Manager). This works pretty nicely. If used soley as application "files", Oracle in some cases consider this as a CloudFS implementation and will want more $$$ for it. But in my testing chose ACFS over OCFS2.