Re: [Beowulf] looking for good distributed shell program

. On a cluster set up with xCAT all that is taken care of for you through its kickstart and postscript stuff. cheers, Chris -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] tracejob command shows error

a bugzilla account and add your problem to that one please ? The original reporter got rid of his install before we could track the problem down. For the record we're running 2.4.8 at VLSCI on CentOS 5.4 (x86-64) without any issues. cheers, Chris -- Christopher Samuel Senior Systems

Re: [Beowulf] Looking for block size settings (from stat) on parallel filesystems

-03 11:29:54.613258023 +1000 Modify: 2010-05-29 01:24:56.0 +1000 Change: 2010-06-03 11:29:54.613258023 +1000 cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545

Re: [Beowulf] Multiple FlexLM lmgrd services on a single Linux machine?

with the vendor daemon for the application and the (optional) license.opt file. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] PBS/Maui delay starting of several jobs for certain user

limit the number of jobs they can run by using MAXJOB to a level that your file server can cope with ? Is your fileserver a RHEL box using ext3 by some chance ? cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam

Re: [Beowulf] shutting down pbs server and maui for half an hour willaffect running jobs?

their state in the pbs_server logs. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version

Re: [Beowulf] shutting down pbs server and maui for half an hour will affect running jobs?

then they will get killed by the pbs_mom unless you extend their walltime first. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au

Re: [Beowulf] first cluster

space for active processes. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG

Re: [Beowulf] shutting down pbs server and maui for half an hour will affect running jobs?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 13/07/10 13:12, akshar bhosale wrote: thanks..any other related info ? Not that comes to mind, I'm afraid! - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam

Re: [Beowulf] first cluster

to overcommit their memory, if you disable overcommit I believe that you will instead just get malloc()'s failing when there is nothing for them to grab. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam

Re: [Beowulf] Re: Beowulf Digest, Vol 77, Issue 14

compilers. Even so I'd suggest benchmarking between OMPI and Intel MPI to see which does better by your application. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545

Re: [Beowulf] first cluster

= instead, this means that pbs_mom monitors the children and kills them if they go over their limits. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] first cluster

an order # of processes to be killed. The possible values of oom_adj # range from -17 to +15. The higher the score, more likely the # associated process is to be killed by OOM-killer. If oom_adj # is set to -17, the process is not considered for OOM-killing. cheers! Chris - -- Christopher Samuel

Re: [Beowulf] first cluster

into a node. http://www.rpmfind.net/linux/rpm2html/search.php?query=torque-pam Ah Ha!. The key. It's worth noting that comes with Torque, you just need to configure it with the --with-pam directive. The code is in src/pam and there's a README there too. cheers, Chris - -- Christopher Samuel

Re: [Beowulf] Kernel action relevant to us

/ It adds a initrwnd option to set that initial receive window size. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au

Re: [Beowulf] typical protocol for cleanup of /tmp: on reboot? cron job? tmpfs?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 21/08/10 08:53, Rahul Nabar wrote: Yes. I'm using Torque. That's an interesting feature! I'll check it out. You want to check out the $tmpdir option for the pbs_mom configuration file. cheers! Chris - -- Christopher Samuel - Senior Systems

Re: [Beowulf] The end of Sun Grid Engine?

and contributions to Torque, plus Torque is itself a fork of OpenPBS so IMHO there's no way SC/CR/AC could relicense it without getting permission from all the copyright holders. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative

Re: [Beowulf] When is compute-node load-average high in the HPC context? Setting correct thresholds on a warning script.

in the 80's where they were run with a lot of nfsd's that were blocked waiting for I/O due to ext3. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] When is compute-node load-average high in the HPC context? Setting correct thresholds on a warning script.

about how the kernel counts tasks in I/O wait as being part of the run queue (and thus showing up in the load average). cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903

Re: [Beowulf] Oracle spins own Linux for mega hardware

they've added some performance patches to it.. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP

[Beowulf] Homebrew Cray-1A, 1/10 scale, binary compatible, build with FPGA

-1A software to run on it (even after FOI requests and contacting the Computer History Museum) so he's put out a call for help.. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61

[Beowulf] 10Gb/s iperf test point (TCP) available ?

time I'd be most grateful! The code is on SourceForge and is easy to compile (and is packaged already in Debian and Ubuntu). cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0

Re: [Beowulf] 10Gb/s iperf test point (TCP) available ?

, either within Australia or outside. :-( cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE

Re: [Beowulf] Interesting

, it appears that the records of the recovery project have also gone missing from both the UK National Data Archive and the UK National Archives. :-( Depressing really.. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative

Re: [Beowulf] cluster profiling

command. Quite a neat little tool I've got to say! cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP

Re: [Beowulf] Go programming language

Code here: http://github.com/bjpop/haskell-mpi cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP

[Beowulf] IB symbol error thresholds for health check scripts ?

] - checks run prior to a job start, after a job exits and every 7.5 minutes (every 10 mom intervals). - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computational Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] IB symbol error thresholds for health check scripts ?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Stuart, On 30/12/10 05:29, Stuart Barkley wrote: On Mon, 13 Dec 2010 at 17:43 -, Christopher Samuel wrote: We run a bunch of health checks [1] on a compute node through Torque [2] and if they fail the node gets knocked offline. Can

[Beowulf] RIP Lustre @ Oracle ?

it is open source and other companies (employing ex-Lustre developers) have already set up to maintain it. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545

Re: [Beowulf] Open Grid Scheduler (SGE)

matter.. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux

Re: [Beowulf] Open Grid Scheduler (SGE)

of its own as Joe Landman ably pointed out.. http://scalability.org/?p=2921 cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] optics question (SFP+ vs XFP)

) which, their site says, can do: http://www.force10networks.com/products/mediaspecifications.asp # 26 m reach typical on 62.5 µm (160Mhz.km) MMF, 33 m reach # typical on 62.5 µm (200Mhz.km) MMF, 300 m reach typical # on 50/125 µm MMF cheers, Chris - -- Christopher Samuel - Senior Systems

Re: [Beowulf] Open Grid Scheduler (SGE)

for the Destruction of Communities as some employees called Sun.. http://lwn.net/Articles/370157/ cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

[Beowulf] New Iranian clusters - GPU based ?

to tell if GPUs are in them, but the spacing between them does seem to imply that they kick out a fair amount of heat.. Interesting! cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61

Re: [Beowulf] Virtualized Infiniband in KVM?

be attractive for users searching for # InfiniBand-like performance without the upfront investment required # to build an InfiniBand cluster or users wishing to dynamically expand # their cluster during periods of high demand. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator

Re: [Beowulf] Virtualized Infiniband in KVM?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 31/03/11 21:56, Christopher Samuel wrote: It was presented on 2nd December 2010 so probably reasonably up to date although their slides provide no information at all on which kernel version they were using for this testing. Just found the PDF

Re: [Beowulf] Execution time measurements (fwd)

.. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux) Comment

Re: [Beowulf] GP-GPU experience

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 05/04/11 05:26, Vincent Diepeveen wrote: GPU's completely annihilate cpu's everywhere. Great! Where can I get one with 1TB of on-card RAM to keep our denovo reassembly people happy ? - -- Christopher Samuel - Senior Systems Administrator

Re: [Beowulf] Grid Engine build machine (was: multi-core thread binding enhancement)

- -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla

Re: [Beowulf] transparent hugepage?

yet to do so due to time pressure and an unexpected stay in hospital. If I do get a chance once I've recuperated I'll certainly post any results on. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

Re: [Beowulf] PathScale EKOPath goes open source

here's a direct download link http://c591116.r16.cf2.rackcdn.com/ekopath/nightly/Linux/ekopath-2011-06-12-installer.run Thanks - I presume there'll be a source tarball at some point as well ? A query not a request, I realise you're busy.. :-) All the best, Chris - -- Christopher Samuel

Re: [Beowulf] PathScale EKOPath goes open source

the best, (another) Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU

[Beowulf] Japan knocks China off the #1 spot of the Top500 by 3X - a GRAPE machine ?

source who claims that this is using GRAPE cards as APUs to reach its performance without causing (another) meltdown in Japan.. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0

Re: [Beowulf] Japan knocks China off the #1 spot of the Top500 by 3X - a GRAPE machine ?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 20/06/11 17:14, Christopher Samuel wrote: But I have a reliable source who claims that this is using GRAPE cards as APUs to reach its performance without causing (another) meltdown in Japan.. My reliable source appears to have been mistaken

Re: [Beowulf] PetaBytes on a budget, take 2

. # # By operating with redundancy, we are future-proofing our # system. In the event of an operational flaw in any one # operating system, disk technology or vendor, an alternative # is available, so the risk to data is lower. - -- Christopher Samuel - Senior Systems Administrator VLSCI

Re: [Beowulf] Grid Engine multi-core thread binding enhancement -pre-alpha release

be useful...) There's already been Carl Smith from pbspro.com on the hwloc mailing list finding configure problems with AIX (which have been fixed)... cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

[Beowulf] IBM terminates Blue Waters contract

. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG

Re: [Beowulf] All Your BASH Are Belong To Us

is the entity that is the copyright holder, not necessarily the creator. [1] - yes, I know there are some entities that aren't allowed to hold copyright.. :-) - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

Re: [Beowulf] All Your BASH Are Belong To Us

, and the NASA license doesn't permit this. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE

Re: [Beowulf] Users abusing screen

it with a wrapper if you didn't want to build a modified version ? That way you get to restrict the number of cores they can monopolise.. Of course a user could get around it by building their own copy, but at least then you'd be able to see that.. cheers, Chris - -- Christopher Samuel

Re: [Beowulf] building Infiniband 4x cluster questions

...). Is that for an MPI message ? I'd heard that FDR might have higher latencies due to the coding changes that were happening - is this not the case ? cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

Re: [Beowulf] Intel unveils 1 teraflop chip with 50-plus cores

from the Knights Corner Product. It runs. # Even more yet, it showed 1 teraflop double precision # -- 1997 was dozens of cabinet -- 2011 is a single # 22nm chip. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

Re: [Beowulf] Leif Nixon gets quoted in Forbes

indicating a broken telnet program (for our case only). ;-) cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au

Re: [Beowulf] Leif Nixon gets quoted in Forbes

indication this was to do with trying to break the crypto. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP

Re: [Beowulf] FAWN

cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment

Re: [Beowulf] Intel buys QLogic InfiniBand business

Wikipedia page under history, but sadly without references.. http://en.wikipedia.org/wiki/InfiniBand#History - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] Intel buys QLogic InfiniBand business

.. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla

Re: [Beowulf] Intel buys QLogic InfiniBand business

a similar performance GPU system? Let alone have any applications that will actually take advantage of it. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545

Re: [Beowulf] cpu's versus gpu's - was Intel buys QLogic InfiniBand business

though is that it's just MPI and threads, nothing that unusual at all - certainly no need to learn CUDA, OpenCL, etc.. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545

Re: [Beowulf] cpu's versus gpu's - was Intel buys QLogic InfiniBand business

mean the US government funding people will listen to them.. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE

Re: [Beowulf] cpu's versus gpu's - was Intel buys QLogic InfiniBand business

quoted what they wrote - they may not have wanted that in the public domain. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au

[Beowulf] PCPro: AMD: what went wrong?

. ?With no AMD solutions competitive with an Intel Core i5-2500K?, he says, ?AMD is a tough sell in the mid- and high-end market.? Another British PC supplier told us off-the-record that sales are partly propped up by die-hards who only buy AMD ?because they don?t like Intel?. [...] - -- Christopher

Re: [Beowulf] newb question - help with NUMA + mpich2 + GPUs

why MVAPICH2 appears to do better than it with GPUs (for the moment), the summary is here: http://www.open-mpi.org/community/lists/devel/2012/02/10430.php Hope this helps! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative

[Beowulf] Controlling java's hunger for RAM

requests on jobs, and malloc() now usually calls mmap() to allocate rather than sbrk() so RLIMIT_DATA is useless (not enforced). Any ideas?? cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au

Re: [Beowulf] Controlling java's hunger for RAM

whilst dealing with the after affects of someone accidentally upgrading one node of a multi-master CentOS DS LDAP cluster whilst I was away.. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3

Re: [Beowulf] Computer on a stick

KByte # secondary cache. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG

Re: [Beowulf] Computer on a stick

, # numerically-intensive, scientific applications (e.g., PPM) in # the range of 70 Mflops. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au

Re: [Beowulf] Raspberry Pi

/Raspberry_Pi#Hardware Their usual site is down at the moment as it couldn't cope with demand (but then again, neither could Farnell or RS, their retailers :-) ). cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

Re: [Beowulf] Ninja Blocks (Re: Raspberry Pi)

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 04/03/12 03:04, Douglas J. Trainor wrote: Ninja Blocks are being funded by a Kickstarter campaign -- I don't think they run Linux though, unlike Raspberry Pi. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life

Re: [Beowulf] Google greywater cooling

buildup inside the pipes, so greywater would probably never be used inside one of these systems. In our experience they also add anti-fungals like azoles to them too. cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative

Re: [Beowulf] Does computation threaten the scientific method?

of virtualisation you need). Then of course there's the issue of hardware errata, not to mention availability if you ran it on an Alphaserver SC in 2002.. cheers. Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

[Beowulf] Migrating from IB datagram mode to connected mode live ?

redundancy in servers to do this) or whether we'll need to schedule an outage and take the whole system down and bring it back up in connected mode. Any thoughts? cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam

Re: [Beowulf] yikes: intel buys cray's spine

be a little worried, perhaps they should look at buying Gnodal, where some of the Quadrics people ended up, to get in on that act.. :-) - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903

Re: [Beowulf] yikes: intel buys cray's spine

/partition up their IB and Cray interconnect investments. cheers! Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP

Re: [Beowulf] Forward: RE:

. :-( My only contact at Penguin moved to Apple a year or two back so I don't know anyone to contact there these days - anyone else ? cheers, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone

Re: [Beowulf] Torrents for HPC

have native IB. - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux

Re: [Beowulf] Status of beowulf.org?

moderation switch for a list, but something of a last resort (it's useful for announcement only type lists where even with all your carefully chosen rules to list who is allowed to send you still want a backstop so you can check one last time before it goes out). cheers, Chris - -- Christopher Samuel

Re: [Beowulf] Status of beowulf.org?

, Chris - -- Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.unimelb.edu.au/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment

Re: [Beowulf] lm_sensors and clusters and wrong intel cpu readings

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 09/08/12 17:21, John Hearns wrote: Use the ipmitool utility to probe the readings from BMC cards (ILO, DRAC, they're the same thing). We do the same.. cheers! Chris - -- Christopher SamuelSenior Systems Administrator VLSCI

Re: [Beowulf] lm_sensors and clusters and wrong intel cpu readings

by default.. :-) modprobe coretemp # is your friend :-) cheers, Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci

Re: [Beowulf] Moderation of the Beowulf Mailing List

checked the University spam filter and found them all caught there. I *think* that's a good thing.. :-/ cheers, Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] Doing i/o at a small cluster

and was surprised to find it matched XFS for read write performance. e) ZFS is not yet on linux. http://zfsonlinux.org/ It's what LLNL are going to use (using?) for their Lustre OSD's on Sequoia. Packaged for Ubuntu via a PPA too. cheers, Chris - -- Christopher SamuelSenior Systems Administrator

[Beowulf] RFC: Restrict posting to subscribers only ?

moderation (as spammers do sign up to lists too) as their messages won't get missed in the general flood of non-member spam. This is how all the other Mailman lists I run are configured and it's not caused issues or complaints there. Thoughts please! cheers, Chris - -- Christopher Samuel

Re: [Beowulf] RFC: Restrict posting to subscribers only ?

discarded or rejected depending on the list they are added to. The problem is that they're pretty much all from unique addresses, so you'll never catch that much that way. cheers! Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative

Re: [Beowulf] RFC: Restrict posting to subscribers only ?

On 08/24/2012 08:26 PM, Gregory Matthews wrote: this is not a good idea - your list can become a spam mirror and replying to spammers is bad in lots of ways. The Mailman software is *already* doing this for the Beowulf list as it replies to every message held for moderation with a link so

Re: [Beowulf] RFC: Restrict posting to subscribers only ?

On 08/24/2012 10:11 PM, Jörg Saßmannshausen wrote: Hi all, Hiya! I am one of the many who cannot post to the list despite being a member of it for some years. :-/ Well I spotted your message in the queue and let it through, so welcome! I think the policy was that only members can post

Re: [Beowulf] RFC: Restrict posting to subscribers only ?

On 08/24/2012 11:56 PM, graham.mull...@syngenta.com wrote: Gentlethings Hiya, While you're noting people who aren't spammers but who are currently locked out despite being subscribers, I'm another. I seem never to have been flagged as 'OK' so gradually (this is over some years) came to

Re: [Beowulf] RFC: Restrict posting to subscribers only ?

that they wish to. We can offer to help with spam filtering configuration (which Joe has already done) but that doesn't need a whole distribution change. All the best, Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative

[Beowulf] Beowulf list now rejecting emails from non-subscribers

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 24/08/12 11:06, Christopher Samuel wrote: I'd like to solicit opinions from list members on changing the policy of the list on messages from non-subscribers from the current default of holding them for moderation to the position of rejecting

[Beowulf] Building Paraview on RHEL5/CentOS5 ?

into the dependency hell that would be compiling Mesa from source. Has anyone succeeded with this and can shed some light? cheers! Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903

Re: [Beowulf] Current mailing list setup

for the list. cheers, Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http://twitter.com/vlsci -BEGIN PGP SIGNATURE- Version

Re: [Beowulf] Servers Too Hot? Intel Recommends a Luxurious Oil Bath

then the overhead of making bespoke racks for these things will make some sense. But even then it'll take a lot of clever engineering to avoid the issues that Jim mentioned; the capillary action of oil through insulated wires hadn't occurred to me - that could be very messy! cheers, Chris - -- Christopher

Re: [Beowulf] NFS over RDMA small block DIRECT_IO corruption

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 04/09/12 21:38, Vincent Diepeveen wrote: That link gets reported here as spreading spyware? Looks fine to me.. http://www.google.com/safebrowsing/diagnostic?site=bugzilla.linux-nfs.org - -- Christopher SamuelSenior Systems

Re: [Beowulf] NFS over RDMA small block DIRECT_IO corruption

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 05/09/12 13:13, Douglas J. Trainor wrote: the problem is the ssl cert issued by Trond Myklebust expired July 23… Indeed, but that doesn't mean it's serving malware. cheers! Chris - -- Christopher SamuelSenior Systems Administrator

Re: [Beowulf] NFS over RDMA small block DIRECT_IO corruption

to it to unsubscribe it then Mailman tells me it's not subscribed. :-( Will dig further.. - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http://www.vlsci.org.au/ http

Re: [Beowulf] burn-in bootable cd

in June 1993 beating the CM-5 at LANL by a considerable margin (and it has the same amount of RAM, 32GB). ;-) cheers, Chris -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545

Re: [Beowulf] Servers Too Hot? Intel Recommends a Luxurious Oil Bath

(or rather, lack of a case IYSWIW) for their nodes in their search clusters, but they did make the point they use more standard hardware for the services they make money from (like advertising) to get better reliability. Whether that's still the case, I don't know. cheers! Chris - -- Christopher

Re: [Beowulf] HFT - was Intels Luxurious Oil Bath

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Folks, please can we give this HFT speculation a rest please. - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 http

Re: [Beowulf] Southampton engineers a Raspberry Pi Supercomputer

# (non virtualized) parallel programming in the raw at the 1000s dollar # price point. Which illustrates Ellis's point precisely.. cheers, Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative Email: sam...@unimelb.edu.au Phone

Re: [Beowulf] General thoughts on Xeon 56xx versus E5 series?

, faster QPI, higher TDP, can address more RAM and same RRP.. ;-) Caveat: in the past I've found howlers on the ARK Intel site, so validate any info with external sources! cheers, Chris - -- Christopher SamuelSenior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative

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