On 06/28/10 12:13 PM, Emmanuel Noobadmin wrote:
Has anybody tried or knows if it is possible to create a MD RAID1 device using networked iSCSI devices like those created using OpenFiler?
The idea I'm thinking of here is to use two OpenFiler servers with physical drives in RAID 1, to create iSCSI virtual devices and run CentOS guest VMs off the MD RAID 1 device. Since theoretically, this setup would survive both a single physical drive failure as well as a machine failure on the storage side with a much shorter failover time than say using heartbeat.
I considered much the same a couple years ago, its certainly doable.... But, after playing with it a bit in the lab, I moved onto something more robust...
the downside is A) iscsi on homebrew systems like openfiler tends to be less than rock solid reliable. and B) upon a 'failure', the rebuild times will require remirroring the whole volume, which is going to take quite awhile across two iscsi targets.