Nic Doye schrieb:
>
> On Sat, 2002-01-26 at 19:43, Stephen Lord wrote:
>
> > Default log location is in the middle of the partition/volume you run
> > mkfs on.
> > If you want an external log then you need to dedicate a partition to it,
> > it cannot
> > be in a file.
> >
> > These are the options for an external log:
> >
> > mkfs -t xfs -l logdev=/dev/xxx,size=XXXb /dev/yyy
> > mount -t xfs -o logdev=/dev/xxx /dev/yyy /mnt
>
> Just a small question for those people who use external logs. Do you put
> them on the same disk (or disk set) or do you put them on a seperate
> disk (and indeed, seperate controller).
>
> If you do put them on a seperate disk, is it mirrored? To a seperate
> controller?
>
> I'm just thinking, that to build a fault tolerant, yet high throughput
> server could start costing a lot of cash... On the otherhand, does
> (hardware) RAID5 push the performance down so low, that an external log
> won't improve things anyway.
>
> nic
Software RAID5 and the log on Software RAID1 on the same disks works
very fine for me. You'll need a really expensive Hardware RAID
controller to get better performance!
I think it's very important to put the log on RAID too otherwise your
RAID5 is useless, isn't it?
-Simon
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