Nathan, I was using Kraken this afternoon as well, and it was one of the longest waits I've had in terms of system delays. So it wasn't just you--we were all suffering from it. On 02/22/2012 06:38 PM, David Collins wrote:
I ended up starting an interactive job on a compute node. The import still took about 10 minutes. It finally did finish importing though. It doesn't surprise me that it still took that long even on an interactive node. The problem isn't the node but the disk, and 100% of the disks on Kraken are 100% terrible and getting worse.
I almost always shuffle my stuff to Nautilus, if you have an account there. Using hpss and/or htar to transfer files between the two is really fast (limited only by Kraken's disk) you can get dozens of Gb in minutes. (If they're small sets, you can use the home disk to transfer.)
Nathan Goldbaum Graduate Student Astronomy & Astrophysics, UCSC goldbaum@ucolick.org http://www.ucolick.org/~goldbaum
On Feb 22, 2012, at 2:45 PM, Geoffrey So wrote:
I would recommend if possible getting an interactive node to try yt on. I've seen many users abuse the login node of Kraken, running multiple jobs, and sometimes it's multiple users at the same time that slows the node down. Have you tried another login node of Kraken, since there's 11 to choose from.
If I do >top and see many jobs running I usually just switch,
ssh -Y krakenpf1
you can do this all the way to krakenpf11
From G.S.
On Wed, Feb 22, 2012 at 2:35 PM, Britton Smith <brittonsmith@gmail.com> wrote:
Hi Nathan,
That's on the high side a little, but, sadly, not the maximum I've ever waited.
Britton
On Wed, Feb 22, 2012 at 5:33 PM, Nathan Goldbaum <goldbaum@ucolick.org> wrote:
Hi Britton,
Thanks for the suggestion. I've been waiting for more than 10 minutes now and it still hasn't finished the import - does that seem excessive?
Nathan Goldbaum Graduate Student Astronomy & Astrophysics, UCSC goldbaum@ucolick.org http://www.ucolick.org/~goldbaum
On Feb 22, 2012, at 2:19 PM, Britton Smith wrote:
Hi Nathan,
It's most likely not hanging, but working on the import. The filesystem on Kraken can be incredibly slow at times. If you're only waiting a minute or so, you will probably need to give it a bit longer.
Britton
On Wed, Feb 22, 2012 at 5:15 PM, Nathan Goldbaum <goldbaum@ucolick.org> wrote:
Hi all,
I'm trying to run yt on a login node on kraken. All I'm doing is invoking python from the command line and importing yt. However, python hangs on 'from yt.mods import *'.
The python interpreter also takes a very long time (~ a minute or so) to start from the command line.
This happens using both the yt/dev and yt/2.3 module.
Anyone have any ideas?
Nathan Goldbaum Graduate Student Astronomy & Astrophysics, UCSC goldbaum@ucolick.org http://www.ucolick.org/~goldbaum
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