Marc Tardif wrote:
> Now I'm back to square one, looking for a storage solution for my
> postgresql db. More specifically, something scallable and very fast. In my
> reading, I found that raid5 could also fail and that a tape backup is
> always recommended. Therefore, I would think raid 0 or 1 or 0+1 could do
> just fine having a tape backup as fault tolerance. As for a software or
> hardware implementation, opinions vary. Marc G. Fournier seems to prefer
> the software solution while there are many people preaching the benefits
> of hardware raid out there. But the question remains, how can all this be
> scallable, ie how can I expand on existing storage space.
On our Digital RAID array you plug in another disk and you tell it to use it.
But then, the RAID array is a workstation in its own right, and runs its own
operating system. When it comes to RAID I think it is still a matter of you
get what you pay for. And yes, we always back up onto DLT (haven't had any
failure in the 2 years we've had it though). And we run Digital Unix which is
still miles better than any of the free operating systems, especially under
heavy load.
Adriaan
