Tomas France wrote:
This wouldn't be probably the best solution in my situation. The
computer we
are talking about will be quad-core web server with 8GB RAM and initially
2x500GB SATA HDDs setup in a RAID-1 array. When it begins running low on
space or more HDDs performance is needed, I plan to convert the RAID-1 to
RAID-10 by adding 2-4 more hard disks (I've found some info on how to do
this so hopefully it will work).
If I should follow the commonly accepted strategy saying that the swap
space
should be 2X+ the amount of RAM, that means 16GB. If I add 4 more HDDs in
RAID-1 pairs later, then I would end up with 3 swap partitions on RAID-1
taking 96GB (6*16GB) of space on the harddrives which would be a
considerable waste of space.
Sure, when adding the more hard disks I could probably create a
smaller swap
partition on each of them but that would be yet another complication.
Using
a swap file initally on the RAID-1 array and then on the RAID-10 array
sounds like a much simpler solution to me as it will allow me to
change the
size of the swap space more flexibly.
After you go to 3-4 drives, most systems don't swap enough to justify
the effort of spreading the swap over more drives. Three drives and
RAID-10 work well, surely you can use the space on the other drives for
another useful purpose. Or just use it, RAID-10 should handle similar
partition sizes IIRC.
--
bill davidsen <davidsen@xxxxxxx>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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