Raid 5 (was: Mounting of Linux volumes)
amcnabb at mcnabbs.org
Thu Dec 1 22:55:02 MST 2005
On Thu, Dec 01, 2005 at 10:45:22PM -0700, Nicholas Leippe wrote:
> Any application that relies on the coherency of multiple, volatile files--ie
> they correlate differently over time.
> - databases
> - any application that produces temporary files (web server session
> data, perhaps?)
> I'm sure there are others.
> This is the reason point-in-time backup systems are so expensive--it's a
> very difficult problem to solve in a manner that is completely transparent
> to running processes.
The DM system in Linux can do a snapshot (I believe LVM has an interface
to it). It's a very simple approach.
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