Andre Ruiz wrote:
As I understand, linux raid tools operate on partitions only, not on full disks, as hardware based solutions.
That's what I was afraid of. Thanks for the info. I will have to figure out a way to increase the size of the partition in the fly when the time comes that we need to do such a thing.
In your case, it seems the raid logic would be inside virtual machines, is this correct? You would have double network traffic. You can create one big partition of PV type, and create more small partitions of PV type and make them join the VG each time you grow your disks. The raid would be on each filesystem of LVM. Still a pain in the arse.
Yes, the RAID logic is inside the virtual machines. Double network traffic is no problem as I have two gigabit network interfaces which I can dedicate to the SAN. Yes, creating partitions and adding them to the VG each time is possible but a pain. I'll have to see what else I can work out.
Hard to switch to raid on the AoE server?
I already have RAID5 on the AoE server. But what if the CPU/RAM/mobo on the AoE server dies? :) This is why one side of the mirror is on one AoE server and the other side of the mirror is on another. If the cpu node dies I can restart the domain on another one very quickly. The only single point of failure in my cluster is the switch and eventually I might even get another one and put half the disk nodes on one and half on the other and cross connect the cpu nodes. :)
-- Tracy R Reed http://ultraviolet.org A: Because we read from top to bottom, left to right Q: Why should I start my reply below the quoted text
