[Babase] Re: Papio is hosed again
Hunter Matthews
thm at duke.edu
Thu Mar 23 17:20:22 EST 2006
I noticed that when I logged in.
Ok, papio is back up.
Changes made were:
1) Upgrade from centos-3 to centos-4
I'm hopeful that the newer kernel with fix the problem we've been
having. Oh - and it wasn't the auth subsystem - it was actually lower
level than that. Things like nfslock were hanging, as well as
postgresql itself.
With luck, that problem is gone.
2) Hyperthreading has been turned off.
This was a "hack" of intels to try and make one processor seem like
two. In _most_ of the unix/linux cases that I know of, it makes things
worse performance wise. If Karl or someone comes up with something that
works better with it, I can turn it back on.
3) The BMC is turned on
This only affects me - its a management function in the hardware itself
that we are starting to use for biology.
4) Default power state changed from "last" to "off"
This was a mistake from the original setup - due to power restrictions
in our building and on our UPS's in the server room, this must always
be "off" so that in the event of a power problem, I can stagger-start
the room back up.
5) I switched papio from hardware raid to software raid
This was both for performance reasons and safety reasons. On _most_
workloads in the department, software raid is actually faster or break
even with hardware raid. Since its MUCH easier to monitor the health of
software raid, I naturally default to it now.
This is the one change that could have big impact on performance - I've
asked Karl to run some tests and let me know. It will not be a big
effort to switch back if papio is now noticably slower.
6) The /local filesystem is now the /srv filesystem.
/local was a standard that biology has had for years. Recently (3 years
ago) /srv was added to the official filesystem standard and it does the
same job.
Karl,
I noticed when fixing the NIS maps that I never
migrated /biology/groups/babase from pogonia to papio. Please - lets let
papio settle for a week or so and then let me move it - I need the space
on pogonia.
If anyone notices a problem, please let me know.
On Thu, 2006-03-23 at 17:28 +0000, Karl O. Pinc wrote:
> FYI
>
> Once again, authentication is locked up.
>
> I'm out but left one terminal in so you can write
> to me. (But I probably won't be looking at that
> window... :(
>
>
> Karl <kop at meme.com>
> Free Software: "You don't pay back, you pay forward."
> -- Robert A. Heinlein
>
--
Hunter Matthews Unix / Network Administrator
Office: BioScience 145/244 Duke Univ. Biology Department
Key: F0F88438 / FFB5 34C0 B350 99A4 BB02 9779 A5DB 8B09 F0F8 8438
Never take candy from strangers. Especially on the internet.
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