Re: Running Multiple Copies of Qmail on the same server...

[Bill Carlson]

On Tue, 10 Oct 2000, James Stevens wrote:

> Thanks! .. ;)
> 
> The machine I'm running qmail on has like a full c block assigned to it and
> a RAID5 array so I don't think the disk i/o will be a problem ??  But if
> needed I also have a RAID1 Array setup on it with twin 20gigs so I could
> place the secound qmail over there but I think the RAID5 should be fast
> enough for it.... Thoughts?

Depending on how the RAID5 is setup, it can actually be slower than a
single disk! Especially on data writes. RAID5 is a compromise between data
safety, i/o speed and price. A decent RAID1 or RAID 1+0 will cost a little
more (depending on your needs), but the performance will be better as
well.

You mention 20GB drive, something tells me these are IDE. Again, a price
vs performance tradeoff as a good SCSI setup will leave the top of the
line IDE setup in the dust, but will also cost a pretty penny.

Either way, I'd move the queue to a RAID1 setup instead of RAID5.


$.02

Bill Carlson
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