Re: [Beowulf] [External] Re: old sm/sgi bios

prerequisite black fingernail polish. I don't remember how or why, but during the interview I claimed that SGI was doomed because of the rising power of PCs and their graphics cards. He seemed to take this personally and the interview ended. I didn't get the job. Cordially, J

Re: [Beowulf] Deskside clusters

nteractive processes so the desktops' users (hardly) noticed. Sure, it wasn't as fast or pretty as a real cluster, but it falls into the computational category I invented called Pretty High Performance Computing (PHPC). Cordially, Jon Forr

Re: [Beowulf] HPC workflows

need for what I call "pretty high performance computing", which is the highest performance computing you can achieve, given practical limits like funding, space, time, ... Sure there will always people who can figure out how to go faster, but PHP

Re: [Beowulf] Westmere EX

y can build gcc and other large packages very quickly. The scientists who run single process simulations also like them but they're not real picky about how long it takes for something to run. They also generally spend close to no time at all optimizing anything. -- Jon Forrest Research Comp

Re: [Beowulf] Memory stress testing tools.

ow do you figure out which memory module to replace? -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___ Beowulf mailing list, Beowulf@be

Re: [Beowulf] Begginers question # 1

physical machine using VirtualBox. I call this Rocks-in-the-Box. You'd never want to use this method for production work but doing things this way makes it very easy to create test clusters. You could also use these test clusters to dabble in parallel programming. Cordially, -- Jon Fo

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

risk of using up too much RAM if a program gets out of hand writing to /tmp. Right. I don't think this is a good idea for scratch space for the reasons you mention. It does make sense for things like compilers and other programs that create very transient and small files. Cordially, --

Re: [Beowulf] what defines "enterprise class" hard drives?

ople base their opinions on the manufacturer's claims, and some people base their opinions on the famous papers from Google and CMU that came out a couple of years ago that described how very large numbers of drives really work. It's an interesting topic, no doubt. Cordially, -- Jon Forrest R

Re: [Beowulf] dollars-per-teraflop : any lists like the Top500?

lved in the research projects seemed like they would have promising commercial value, such as RAID, RISC, Postgres, and NOW. -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jl

Re: [Beowulf] dollars-per-teraflop : any lists like the Top500?

low us to accept the equipment. Things are different now, but space and people are still more expensive than most equipment. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jl

Re: [Beowulf] 48-Core X86_64 Compute Node - Good Idea?

x27;t come up with Twin boxes, I might be forced to follow your advice. I'm not concerned about sysadmin work, because I'm using Rocks. I'm more concerned about ending up in the Twilight Zone where things aren't as they appear. -- Jon Forrest Research Computing Support College o

[Beowulf] 48-Core X86_64 Compute Node - Good Idea?

come out but my problem is that I have money to spend that has to be spent soon, maybe before the Twin boxes come out. So, I'm trying to decide what to do. (I only want 1U boxes because I have to pay for rack space). Any advice? Cordially, -- Jon Forrest Research Computing Support College

[Beowulf] Best Way to Use 48-cores For Undergrad Cluster?

ent most of you run in, but it does present interesting issues. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___ Beowu

Re: [Beowulf] Building a Beowulf - Noob

are to create a cluster. Maybe later you'll find some commercial products that solve specific problems, but one of the nice things about modern clusters is that there's so much good quality free software available. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 1

Re: [Beowulf] copying data between clusters

ou can buy a PCI card for not much money. Once USB 3 is ubiquitous this problem (e.g USB 2.0 vs eSATA) will go away. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@be

Re: [Beowulf] confidential data on public HPC cluster

nt page of the paper. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___ Beowulf mailing list, Beowulf@beowulf.org

Re: [Beowulf] Transient NFS Problems in New Cluster

is? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Comp

[Beowulf] Transient NFS Problems in New Cluster

999308 errors:0 dropped:0 overruns:0 frame:0 TX packets:27468315 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:24225053296 (22.5 GiB) TX bytes:73313582546 (68.2 GiB) Interrupt:74 Base address:0x2000 Any advice on what to do?

Re: [Beowulf] Re: GPU Beowulf Clusters

es will have to be rewritten anyway, why write them in a language which would require purchasing yet another compiler? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-

Re: [Beowulf] GPU Beowulf Clusters

evel which could benefit molecular dynamics simulations? Of course, but at what price? I'm talking both about both the price in dollars, and the price in non-standard directives. I'm not a chemist so I don't know what would speed up MD calculations more than a good GPU. Cordially

Re: [Beowulf] GPU Beowulf Clusters

at the s1070 is ~6k$ so you are talking at most two to three machines here with your budget. Ha, ha!! ~$6K should get me two compute nodes, complete with graphics cards. I appreciate everyone's comments, and I welcome more. Cordially, -- Jon Forrest Research Computing Support College of

[Beowulf] GPU Beowulf Clusters

CPUs - only on the GPUs). Even if GPUs can be time shared, given the expense of copying between main memory and GPU memory, sharing GPUs among several processes will degrade performance. Are there any other issues I'm leaving out? Cordially, -- Jon Forrest Research Computing Support College of C

Re: [Beowulf] clustering using xen virtualized machines

ed cluster might be easier to deal with from a central management point of view. -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu _

Re: [Beowulf] clustering using xen virtualized machines

caused by the virtualization is a factor, but it's decreasing as time goes on due to better hardware support of virtualization and cleverer software. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-14

Re: [Beowulf] hardware RAID versus mdadm versus LVM-striping

D (if any) justify its expense. Of course, in any production system you'll want a few extra RAID cards lying around just in case. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460

Re: [Beowulf] Forwarded from a long time reader having trouble posting

08:41:08 frank kernel: [] :xfs:xfs_create+0x237/0x45c Sep 28 08:41:08 frank kernel: [] :xfs:xfs_attr_get+0x8e/0x9f Sep 28 08:41:08 frank kernel: [] :xfs:xfs_vn_mknod+0x144/0x215 Sep 28 08:41:08 frank kernel: [] vfs_create+0xe6/0x158 Cordially, -- Jon Forrest Research Computing Support College of

Re: [Beowulf] Low cost Hi Density - Nehalem clusters

ed on the dual-motherboard Supermicro cases. Since each motherboard can hold 2 processors, and each AMD Istanbul processor has 6-cores, I can get 24 cores per rack unit. That's pretty dense. I believe that SuperMicro also makes similar motherboards for Intel processors. Check it out! Cordial

Re: [Beowulf] How Would You Test Infiniband in New Cluster?

I'll have to figure out how to force IB when using OpenMPI. -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___ Beowulf m

Re: [Beowulf] How Would You Test Infiniband in New Cluster?

the strange way the OFED was installed, I can't easily run over just ethernet. Thanks for your help -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu

Re: [Beowulf] How Would You Test Infiniband in New Cluster?

Bill Broadley wrote: My first suggest sanity test would be to test latency and bandwidth to insure you are getting IB numbers. So 80-100MB/sec and 30-60us for a small packet would imply GigE. 6-8 times the bandwidth certainly would imply SDR or better. Latency varies quite a bit among impleme

[Beowulf] How Would You Test Infiniband in New Cluster?

about IB. How would you test your IB network to make sure all is well? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___

Re: [Beowulf] Mature open source hierarchical storage management

University Ingres database for this. When the database became corrupt this was very embarrassing since I was using this HSM system for work that the Postgres database group was doing. This was the same group that had originally developed Ingres. I hope HSMs have become better since then. Cordial

Re: [Beowulf] Resolved - Approach For Diagnosing Heat Related Failure?

d the fact that my office is cooler than our computer room - this is a sad fact about the financial state of the Univ. of Calif. these days. Anyway, thanks for all the suggestions. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkele

[Beowulf] Approach For Diagnosing Heat Related Failure?

nodes are working fine in the computer room. I'm not convinced the problem is actually the memory. Other than opening the node to spray cooling liquid when it's in the warm room, what approach would you use to figure out which component(s) is(are) failing? Cordially, -- Jon Forrest Resear

Re: [Beowulf] noobs: what comes next?

l times while you're learning. This is normal. Once you have more knowledge, and you've tried running the actual program you want to run in the future, then start thinking about the best hardware to get. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall Uni

Re: [Beowulf] Moores Law is dying

Joe Landman wrote: Imagine you are a processor, and you have written to a location in ram. So now your cache line is dirty, and waiting in queue to be flushed out. In your parallel program, along comes someone else who really, really wants to read that cache line. Ok, so this forces you to

Re: [Beowulf] Moores Law is dying

good thing, because then all the benefits of caching would kick in. There would be no cache coherence overhead since text is read-only. Why is this a bad thing? -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460

Re: [Beowulf] Moores Law is dying

ch-only? I did my test for both Alpha OSF/1 a while back, and modern Intel x86. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu __

Re: [Beowulf] Moores Law is dying

alize that this limit exists, and unless we get much smarter, isn't likely to go away. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___

Re: [Beowulf] OT: Windows tex editors/processors

On Mon, Apr 6, 2009 at 4:13 AM, Geoff Galitz wrote: Can anyone recommend a good tex editor for the Windows Vista platform? There are a lot of options out there on the web, but many of them seem squirrely to me (too many required additional components or limited usability). Someone pointed ou

Re: [Beowulf] OT: Windows tex editors/processors

though my job is mainly to manage Unix machines. The "vim" editor, which is what you get on Linux and MacOS, has an excellent implementation for Windows. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA

Re: [Beowulf] Rackable / SGI

x27;t talking about vendors supporting the Linux kernel. I was talking about independent software projects. One such example is Eclipse. It once was totally IBM and now it's independent. And there are the various projects run by the Apache Foundation. Could SGE find a home outside of Sun? -- J

Re: [Beowulf] Rackable / SGI

easy but that's another issue. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu ___ Beowulf mailing list, Beowulf@beow

Re: [Beowulf] SGI and Sun: In Memoriam

a clear OS direction. As we know, it only got worse. To their credit, Sun has lasted longer than DEC, which had an even more severe lack of OS direction. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460

Re: [Beowulf] switch selection

ld be to not pay too much attention to the subjective reviews you'll see here, including mine. Instead, I'd suggest finding and understanding a switch benchmark program that gives a more objective evaluation. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 1

[Beowulf] WD 2TB Disk Drives - Enterprise or Consumer?

rding head never touches the disk media." (from AnandTech's website). I wonder if these drives will come out in both enterprise and consumer versions. Note especially the mention of vibration reduction. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hal

Re: [Beowulf] Consumer vs. Enterprise Hard Drives in Clusters

1U with a ton of fans the extra $25 is worth it. If there are real differences between the drives then this would be an easier decision. There doesn't appear to be a consensus, however, that the differences in the field are significant. Cordially, -- Jon Forrest Research Computing Support C

Re: [Beowulf] Consumer vs. Enterprise Hard Drives in Clusters

Greg Lindahl wrote: On Wed, Jan 21, 2009 at 05:21:25PM -0800, Jon Forrest wrote: As a wise man once said, "Why pay more?". A wise man once told me to not price weird stuff at newegg. An even wiser man once told me that Seagate 1TB drives aren't weird stuff. They're the

Re: [Beowulf] Consumer vs. Enterprise Hard Drives in Clusters

Greg Lindahl wrote: On Wed, Jan 21, 2009 at 04:19:55PM -0800, Jon Forrest wrote: The last time I checked, the enterprise drives were ~25% more expensive than the consumer drives. This difference might have changed since then. Last time I checked, it was +$10 on a $300 drive. I bought the

[Beowulf] Consumer vs. Enterprise Hard Drives in Clusters

is concerned, my life wouldn't have been improved if I had spent the extra money for the enterprise drives. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 jlforr...@berkeley.edu __

Re: [Beowulf] KVM advice

cables really mess things up. Plus, they're expensive. For modern clusters with pretty reliable hardware, I just use a crash cart or equivalent. I don't need to do this very often so it works out OK. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall Uni

Re: [Beowulf] Compute Node OS on Local Disk vs. Ram Disk

Greg Lindahl wrote: On Tue, Sep 30, 2008 at 09:05:16AM -0700, Jon Forrest wrote: Probably the most dangerous is modifying shared libraries and executables. Uh, this is the safest, if you do it correctly. How do you think people can use rpm/apt/whatever to update their systems with nothing

Re: [Beowulf] Compute Node OS on Local Disk vs. Ram Disk

with very little, but you can build what you want and add it to the vnfs capsules. Comparing and contrasting these approaches is a good topic for another thread. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA

Re: [Beowulf] Compute Node OS on Local Disk vs. Ram Disk

Bogdan Costescu wrote: On Sun, 28 Sep 2008, Jon Forrest wrote: There are two philosophies on where a compute node's OS and basic utilities should be located: You forget a NFS-root setup, this doesn't require memory for the RAM disk on which you later mount NFS dirs. You're

[Beowulf] Compute Node OS on Local Disk vs. Ram Disk

are some of your favorite issues, positive or negative, with each approach? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED]

[Beowulf] Pretty High Performance Computing

ists spent more time worrying about microsecond latency, parallel barriers, or XML overhead but reality always gets in the way. In the future I hope to sin less often but it's a growing experience. Reading this, and other, email lists sometimes helps. Cordially, -- Jon Forrest Research Computin

Re: [Beowulf] Re: GPU boards and cluster servers

it's just a 2X improvement it will be easy to justify. I'm expecting it to be a lot more because much of what goes on around here has already been ported and summarized on the CUDA web site with >=10X improvements. Then, once I've hooked the faculty I'll get them to buy a high

[Beowulf] Re: GPU boards and cluster servers

ain creators will only have to create one tool chain. Anyway, I wasn't really asking about all this. I was only wondering which board provides the most power for the least amount of money for a near-term pilot project. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 17

Re: [Beowulf] Re: GPU boards and cluster servers.

A graphics boards? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ Beowulf mailing list, Beowulf@beowulf.org To c

Resolved (Re: [Beowulf] Weird CentOS Install Problem)

m find this discussion via Google so that they can save themselves some time. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ Beo

Re: [Beowulf] Weird CentOS Install Problem

Matt Lawrence wrote: On Fri, 8 Aug 2008, Jon Forrest wrote: What's weird about this is that the root file system starts on cylinder 1, as confirmed by the fdisk command. This is using a brand new SuperMicro X7SBE motherboard with the newest BIOS. I suggest you create a /boot partiti

[Beowulf] Weird CentOS Install Problem

Needless to say, I have a message in to them. Any ideas could cause this? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ B

Re: [Beowulf] /usr/local over NFS is okay, Joe

7;m not sure the same architecture would make sense now, even with fast networks. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED]

Re: [Beowulf] NVIDIA GPUs, CUDA, MD5, and "hobbyists"

my department to use CUDA, but I'm waiting for V2 of the SDK to come out. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ B

Re: [Beowulf] How Can Microsoft's HPC Server Succeed?

Joe Landman wrote: Hi Jon Jon Forrest wrote: First of all, I like Microsoft, and I voluntarily use Vista as my desktop of choice. I've built and run the Windows environments for the top CS and Civil Engineering departments in the US, and I was the first to port Postgres to Windo

[Beowulf] How Can Microsoft's HPC Server Succeed?

standard Linux clusters before they get any mainstream interest? What technical features could they add that couldn't be added to a Linux cluster? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA

Re: [Beowulf] "Code" vs. "Codes"

nglish. The same thing has happened recently with "e-mail", which didn't used to exist in common usage in plural form. Now you see "e-mails" used by all kinds of people. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of Cal

[Beowulf] "Code" vs. "Codes"

y in the scientific realm, such as what many of us deal with regularly. Does anybody know how this usage first came about? Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PRO

[Beowulf] Opinions of Hyper-threading?

core. The main thing I'd like to know is whether hyper-threading can do any harm when cpu bound jobs are run. Cordially, -- Jon Forrest Research Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [

Re: [Beowulf] Help with inconsistent network performance

realtime and I saw that I wasn't even close to sending enough data to tax the switch. I still don't know the cause of the problem but I'm pretty sure it's not cause by excessive network traffic. I suggest you try iftop to see what your program is really doing. Cordially,

Re: [Beowulf] Joe Blaylock's notes on running a MacOS cluster, Nov. 2007

e MacWorld Expo exhibit floor and see how much activity is iPod/iPhone related and how much is Mac related. I'm looking forward to doing just this in January. -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460

Re: [Beowulf] small-footprint MS WIn "MinWin"

n the Postgres group in the Computer Science Dept. here at UC Berkeley. I managed to port Postgres from Unix to the MIPS version of Windows NT, back in the mid 90s. It was surprisingly easy. Most of the problems were due to Postgres, not to Windows NT. Cordially, -- Jon Forrest Unix Computing Support Colle

Re: [Beowulf] small-footprint MS WIn "MinWin"

gh overhead for most people to notice. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ Beowulf mailing list, Beowulf@beowul

Re: [Beowulf] Parallel Development Tools

noise in a character stream. -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ Beowulf mailing list, Beowulf@beowulf.org To change your

Re: [Beowulf] Problem with Single RAID disk larger than 2TB and Linux

ea.) Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ Beowulf mailing list, Beowulf@beowulf.org To change your subscription

Re: [Beowulf] Nvidia Tesla GPU clusters?

ay and HPC computations. Even if it would only be used for HPC computations its resources will have to be scheduled one day. Maybe it could be scheduled as a asymetric MP, which certain tasks, e.g. the graphics and HPC tasks, having affinity to the GPU. -- Jon Forrest Unix Computing Support College of Che

Re: [Beowulf] openMosix ending

ht to do completely right. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED] ___ Beowulf mailing list, Beowulf@beowulf.org To cha

Re: [Beowulf] Sidebar: Vista Rant

ut it probably is slow... The vast majority of the time, when something seems slow to me, it's because either my fingers or my brain are slow, often both, not my computer. Note that I'm not talking the HPC applications themselves. I always run those on Linux. Co

Re: [Beowulf] Sidebar: Vista Rant

gh edges that remain. I should add that I've been using Unix since 1975. I am *not* proposing running Windows in a cluster. There are technical and financial reasons why this might not be such a smart idea. Go ahead. Make my day... -- Jon Forrest Unix Computing Support College of C

Re: [Beowulf] fast file copying

ter nodes. It would be nice if your program could let the user choose which of these methods to use. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED]

Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

ut what's important and what's not important. Note that I'm not saying that a modern processor should be some kind of hybrid mutant with 32-bit text pointers and 64-bit data pointers. That would be ridiculous. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Ta

Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

size of *every* executable program and library I found on my Fedora Core 6 system. I did not do a very good job at weeding out the dups caused by symbolic links and the like, but the sum total of *all* these text segments would have easily fit in a 32-bit address space. -- Jon Forrest Unix Computi

Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

vs 64-bits question, so I'd welcome additional comments, especially dealing with situations where programs *don't* need the additional address space of the 64-bit model. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkele

Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

d handle the complexity of creating a program with 2-3MB, or even 16MB, of text. But, there's a wall up there somewhere that you, and everybody else, will hit long before you get to 4GB of text. Cordially, Jon Forrest Unix Computing Support College of

Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

rograms in both environments to see what comes out. But I stand firm on my claim that no human, or group of humans, can write a program that requires more than 32-bits of text space. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkele

Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

maybe they exist, and that's what I'm talking about human written programs. Cordially, -- Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall University of California Berkeley Berkeley, CA 94720-1460 510-643-1032 [EMAIL PROTECTED]

Re: [Beowulf] How to Diagnose Cause of Cluster Ethernet Errors?

luser, it was configured and purchased before I got here, so I had nothing to do with choosing its components but I have to admit that I'm not sure what I would have done differently. Cordially, Jon Forrest Unix Computing Support College of Chemistry 173 Tan Hall Un

[Beowulf] How to Diagnose Cause of Cluster Ethernet Errors?

itch be making a mistake while under heavy load when computing the FCS values? I'd like to find the definitive cause of the problem before I ask the vendor to replace massive amounts of hardware. How would you isolate the cause of this problem? Cordially, -- Jon Forrest Unix Computing Support C