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Old 01-18-2008, 08:11 AM
Laurenz Albe
 
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Default Re: Whither swap on system RAID0?

Rohan Beckles <rohan.beckles@virgin.net> wrote:
> As part of a sweeping system performance upgrade, I plan on migrating
> the contents of my single system disk onto two 740GD Raptors, slaved
> together as RAID0. Question: where do I put the swap partition?
> Obviously, partitioning a RAID array doesn't help performance one
> jot, so how do I get around this?


Unless the new disks are faster thean the old disk you had, RAID will not
improve your performance. What RAID does is protect you against disk
failure. That in turn requires some overhead which can decrease disk
performance. As far as I know, the only case where striping increases
performance is when you do large sequential reads or writes.

If all the disk space in the new configuration is in that one RAID array,
you have no alternatives: you will have to put the swap space on the
same disk (array) as the rest of your system. But that's not different
from your current system, so it shouldn't be a problem, should it?

Yours,
Laurenz Albe
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