budachst wrote:ASM is not supported on any of the VM servers. If you only have a single SAN, this will always be a single point of failure, regardless of what you do at the Oracle VM Server level. If you have multiple SANs, you could create repositories on each SAN, and then present multiple virtual disks to each VM and use software RAID or ASM inside the VM to provide fault tolerance across the two disks. Though, you will still have a single point-of-failure for the pool filesystem LUN itself, as that is not mirrored.
I am running an OVM cluster consisting of 6 VM servers, that currently access a FC-attached LUN. This setup does not offer any fault tolerance on the storage level.
Is ASM supported on VM servers at all - or what other options do I have for adding fault tolerance to my underlying storage?
budachst wrote:iSCSI is fully supported by Oracle VM Manager, but I'm surprised that your SAN has no built-in redundancy, i.e. some form of RAID.
so the only possibility is to have clustered storage in the background right? Maybe some ASM cluster that exports iSCSI targets instead of using FC LUNs on the VM servers - I suppose iSCSI targets are supported on VM servers?
budachst wrote:So assuming you only have a single SAN, how would ASM even help to provide redundancy in this space? I think I'm missing something here.
It does - but I do have only one RAID enclosure, where the RAID set consists of a RAID-10 set, but that wouldn't provide redundancy for, e.g. a controller failure. Although it provides good redundancy for drives failures.