i feel like a broken record. :)
it's an escalade 7850 ata raid card.
-mike
On Thu, Apr 25, 2002 at 03:45:23PM -0500, Austin Gonyou wrote:
> What card is it, BTW?
>
>
> On Thu, 2002-04-25 at 15:41, Mike Eldridge wrote:
> > On Thu, Apr 25, 2002 at 03:19:05PM -0500, Steve Lord wrote:
> > > Well, Duh! I should have seen that first time around, I get into the
> > > habit of reading my email too fast!
> > >
> > > We may be able to fix some things, if we can remake the filesystem.
> > > First you need to know the stripe unit of your raid - we can feed
> > > this into XFS to make it do stripe aligned allocations. This has
> > > to be done by hand on linux. Take a look at the mkfs.xfs man page
> > > and the section on sunit and swidth options. Probably bump your log
> > size
> > > up from the default somewhat, not sure how it ended up as 1839
> > > that is scary.
> >
> > RAID5 on this card offers only a 64K stripe size. however, i will be
> > recreating the array as RAID1 or RAID10, which offers stripe sizes from
> > 64K to 1MB. i'm not sure which is the best way to go. i think that the
> > best thing to do, considering additonal space requirements might be
> > neccessary, is to go with multiple RAID1 arrays and let LVM do the
> > striping. any caveats here?
> >
> > this particular box is a mail server and it handles a lot of i/o with
> > pretty small files (< 64K). i want to optimize for performance.
> > unfortunately, this is also my *first* foray into xfs/lvm/raid, so i
> > want to make sure i have as much information as possible before i carve
> > it all in stone.
> >
> > i need to go read some more about LVM...
> >
> > as for the log, yeah, just over 7MB, i have no idea either. info i have
> > read suggests a 32MB log, but i'd like to use something bigger, perhaps
> > 128MB. any caveats to using a log of this size?
> >
> > > You still have not said which kernel version you are running beyond
> > 2.4,
> > > unless I speed read over that too.
> >
> > i did in a previous email. :)
> >
> > it's vanilla 2.4.18 with the xfs-1.1 release patches applied.
> >
> > -mike
> >
> > ------------------------------------------------------------------------
> > --
> > /~\ the ascii all that is gold does not
> > glitter
> > \ / ribbon campaign not all those who wander are
> > lost
> > X against html -- jrr tolkien
> > / \ email!
> >
> > radiusd+mysql: http://www.cafes.net/~diz/kiss-radiusd
> >
> > ------------------------------------------------------------------------
> > --
> --
> Austin Gonyou
> Systems Architect, CCNA
> Coremetrics, Inc.
> Phone: 512-698-7250
> email: austin@xxxxxxxxxxxxxxx
>
> "It is the part of a good shepherd to shear his flock, not to skin it."
> Latin Proverb
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