Re: [PLUG] RAID for swap?

[christopher barry <cbarry@rjmetrics.com>]

On Thu, 2013-04-11 at 11:37 -0400, Walt Mankowski wrote:
> On Thu, Apr 11, 2013 at 10:49:21AM -0400, Casey Bralla wrote:
> > Recently, I got a lot of good advice about how to setup RAID and I have a 
> > follow-up question.
> > 
> > Should I RAID the swap space too?
> > 
> > It seems to me that having the swap partition RAID'd would increase the 
> > reliability of swap, at the penalty of execution speed when it is needed.  
> > Alternately, I could simply create two swap partitions, and only use 1 of 
> > them.  If that disk died, I could just manually activate the swap on the other 
> > disk.
> > 
> > BTW, my situation is that I have 2 identical SATA disks.  I thought I would 
> > partition them identically, with a single large root partition and a swap 
> > partition.  I could put the /boot partition separately on one of the disks in 
> > lieu of the second swap partition, but then I've reduced the reliability of 
> > booting if one disks dies.
> > 
> > Any thoughts or suggestions?  TIA!
> 
> If you used swap files instead of a swap partition, and put the files
> on a RAID drive, wouldn't the files have the same protection that any
> other file on RAID would?
> 
> Walt
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Use a separate SSD for swap if you *really* think you'll be needing to
regularly use swap. Otherwise, install enough memory for your needs.
Avoid having to use swap in the first place.

-C

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