[Dirvish] Backup dies with out a trace
paul at debian.org
Wed Mar 5 18:46:14 UTC 2008
On Wed 05 Mar 2008, Shawn (Red Mop) wrote:
> On Wednesday 05 March 2008 08:58:43 am Petcher, Daniel wrote:
> > I vaguely remember reading (I think it might have been in the MD or LVM man
> > pages) that RAID-ing swap space was not necessary in kernel 2.6 (and
> > possibly 2.4), because if you add multiple swap areas, the OS will balance
> > the swapping-load among them to achieve the same effect without the
> > management overhead of RAID. You might be working harder than you need to.
This is only true if you're considering swap over raid-0 (striping).
> The idea behind raiding swap isn't that it makes things faster, but instead it
> protects against losing a drive with swap on it. Losing a drive with
> unRAIDed swap on it WILL take down the server.
Indeed! If the swapped out data can't be retrieved, your system will
(Be careful about the term "unRAIDed swap", RAID-0 won't help...)
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