From: jeff barratt-mccartney (jbarratt@COMPSAT.COM)
Date: Wed Feb 11 2004 - 23:30:18 EST
swap on ESS works sufficently well. not really best practice on 4.3.3 due to
the inability control it dynamically. seems to be about as fast as internal
pgsp(read as :no significant perf hits when moving swap to ess(direct attach
to ess do get about a 10% perf boost with no fabric btw). internal disk pgsp
is a heck of a lot cheaper, as is physical RAM in those boxes that swap
excessively. in older boxes, ram is cheaper than ESS LUNs, obviously you
have to pay now for RAM, and ESS space may be available for nothing.
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
pSeries AIX Geek
Sent: Wednesday, February 11, 2004 4:57 PM
To: aix-l@Princeton.EDU
Subject: Re: External swap
I didn't have any problems with it, really. I/O
performance seemed marginally faster (we had a few
systems that actually used swap).
I wouldn't run it on any AIX 4.3.3 machine -- only
because you can't run swapoff if you want to move it
off the Shark (unless you left that Shark disk in the
same VG as a non-Shark disk).
I know that prices are coming down, but I would
probably opt to put all my swap on internal drives, if
I could. You can get p650s with 140ish GB internal
drives, which (even with a mirrored hd6) ought to be
sufficient for 99% of the systems.
- pAG
--- Bill Verzal <BVerzal@KOMATSUNA.COM> wrote:
> Just wondering how it worked. I've implemented it.
> Just looking for
> gotchas.
>
--------------------------------------------------------
>
> "If everything is coming your way, then you are in
> the wrong lane"
>
> Bill Verzal
> AIX Administrator, Komatsu America
> (847) 970-3726 - direct
> (847) 970-4184 - fax
>
>
>
> pSeries AIX Geek
> <aixgeek@YAHOO.CO
> M>
> To
> Sent by: IBM AIX
> aix-l@Princeton.EDU
> Discussion List
> cc
> <aix-l@Princeton.
> EDU>
> Subject
> Re: External
> swap
>
> 02/11/2004 11:15
> AM
>
>
> Please respond to
> IBM AIX
> Discussion List
> <aix-l@Princeton.
> EDU>
>
>
>
>
>
>
> I used to be, but I removed it because I needed the
> space back. What's up?
>
> - pAG
> --- Bill Verzal <BVerzal@KOMATSUNA.COM> wrote:
> > Anyone out there using swap space on an ESS ?
> >
> > BV
>
>
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