From becker at scyld.com Thu Nov 14 12:06:02 2002 From: becker at scyld.com (Donald Becker) Date: Tue Nov 9 01:14:27 2010 Subject: [scyld-users] Re: diskless nodes In-Reply-To: <20021114162048.7B3DB44A4@sitemail.everyone.net> Message-ID: On Thu, 14 Nov 2002, Chris Lipp wrote: > I am a newbie to clustering and looking for some assistance. I have set > up a small beowulf cluster (10 slave nodes connected to the front-end > with a 100Mb/s switch) using the SCYLD release. Which release? > I have had no problems > bringing the system up online and booting all of my diskless nodes, and > recieving the "up" status signal from the beosetup monitor. > > My problem arises when I go to run a benchmark; every benchmark I try doesnt > seem to be using the nodes. I have tried many while monitoring the nodes > in the beostatus window with no response. Try using export NP=10 or export ALL_CPUS=1 > The only thing I have been able to determine independently is that the > slave nodes are not reporting any memory during boot-up (I have > upgraded the bios - no change) the slave nodes are old HP vectra > VLs. The beomap function only returns the -1 response from the front > end. I can bpsh into all the nodes with no problems. Test the scheduler by running NP=10 beomap You should get back (on an idle cluster): -1:0:1:2:3:4:5:6:7:8 Note that the first process ("rank 0" for MPI) is on the master, and you use only 9 slaves. ALL_CPUS=1 beomap -1:0:1:2:3:4:5:6:7:8:9 ALL_CPUS=1 NO_LOCAL=1 beomap 0:1:2:3:4:5:6:7:8:9 -- Donald Becker becker@scyld.com Scyld Computing Corporation http://www.scyld.com 410 Severn Ave. Suite 210 Scyld Beowulf cluster system Annapolis MD 21403 410-990-9993 From jdm27 at cornell.edu Fri Nov 22 05:57:00 2002 From: jdm27 at cornell.edu (James D. Marco) Date: Tue Nov 9 01:14:27 2010 Subject: [scyld-users] Welcome to the "Scyld-users" mailing list In-Reply-To: <200211212001.gALK11G29812@blueraja.scyld.com> Message-ID: <5.1.0.14.2.20021122052713.0336e7c0@postoffice.mail.cornell.edu> Hi all, I am a newbee to Beowulf clusters. I am a computer scientist with about 15 years experience. About 6 years ago, I quit programming and began supporting Linux/NT. I've run Yggdrasil, Slackware and Red Hat from the inception (I still have the Halloween disk in my pouch.) The Scyld disk put the cluster up on my computers, fine. The graduate students and faculty will be using it, I only have to support it (yeah...sure!) The initial entry is 5 computers, Dual Athelon, MP, 2200. We had some minor trouble with one of the vendors. He installed a stand-alone cluster based on PVM and MPI (each of the machines was a stand alone computer.) But, he refused to support it. I broke the cluster down into Master and Compute nodes based on Scyld and told the users I would support that. Sooo, my problem: 1) I am looking for some sample programs. The users are a little skeptical that it is up and running after the vendor problem. If I can demonstrate a 200-300% performance increase, this would be good. 2) Is the Scyld cluster multi-processor capable? I have not seen the SMP kernel in the start up of the Scyld cluster. I note that the monitor shows both CPU's on all nodes. Thanks! jdm From becker at scyld.com Fri Nov 22 13:21:00 2002 From: becker at scyld.com (Donald Becker) Date: Tue Nov 9 01:14:27 2010 Subject: [scyld-users] Re: Scyld-users digest, Vol 1 #3 - 1 msg In-Reply-To: <200211221722.gAMHM2G02689@blueraja.scyld.com> Message-ID: On Fri, 22 Nov 2002 scyld-users-request@beowulf.org wrote: > From: "James D. Marco" > > The Scyld disk put the cluster up on my computers, fine. Which version are you using? A 28Cz install? The new 28Dz-5 distributed at SC2002? Or an older 27 series version? > We had some minor trouble with one of the vendors. He installed a stand-alone > cluster based on PVM and MPI (each of the machines was a stand alone > computer.) But, he refused to support it. This is an increasingly common story: a vendor installs a Linux distribution on each node, checks the MPI and PVM boxes, and sells it as a cluster. But there is no one that understands the system to explain how it is configured or to fix problems. > I broke the cluster down into Master and Compute nodes based on Scyld > and told the users I would support that. > 1) I am looking for some sample programs. The users are a little > skeptical that it is up and running after the vendor problem. If I can > demonstrate a 200-300% performance increase, this would be good. Most distribution CDs have linpack and mpi-mandel. Our SC2002 demo disk from this past week has a few pre-configured demos. Our "SCALES" (Scyld Cluster Applications...) CD was distributed at LinuxWorld and the IEEE cluster conference. > 2) Is the Scyld cluster multi-processor capable? I have not seen the > SMP kernel in the start up of the Scyld cluster. I note that the monitor > shows both CPU's on all nodes. Our new Zero Install Cluster demo CDs have only a uniprocessor kernel in order to reliably work on all systems and still fit onto a single CD. Most other versions have both uniprocessor and SMP kernels. -- Donald Becker becker@scyld.com Scyld Computing Corporation http://www.scyld.com 410 Severn Ave. Suite 210 Scyld Beowulf cluster system Annapolis MD 21403 410-990-9993 From collier at cs.widener.edu Sat Nov 23 12:46:05 2002 From: collier at cs.widener.edu (Aaron Collier) Date: Tue Nov 9 01:14:27 2010 Subject: [scyld-users] Scyld Kernel Message-ID: Hello, Is it possible to recompile the kernel under Scyld Beowulf OS? Bye, Aaron From becker at scyld.com Sun Nov 24 14:59:01 2002 From: becker at scyld.com (Donald Becker) Date: Tue Nov 9 01:14:27 2010 Subject: [scyld-users] Re: Scyld-users digest, Vol 1 #5 - 1 msg In-Reply-To: <200211241706.gAOH6sG07549@blueraja.scyld.com> Message-ID: On Sun, 24 Nov 2002 scyld-users-request@beowulf.org wrote: > Subject: [scyld-users] Scyld Kernel > > Is it possible to recompile the kernel under Scyld Beowulf OS? Yes. While we do modify the kernel, there is nothing specific to Scyld in the build procedure. We do build a half dozen different kernels for the distribution. Those kernels are optimized for various combinations of processor architectures and uni/SMP. Most kernels are fully modular: they have infrastructure framework support for everything, but all specific support is build as modules. The beoboot kernel is the simplest. It eliminates all features not necessary for network booting or logging errors to video/serial. -- Donald Becker becker@scyld.com Scyld Computing Corporation http://www.scyld.com 410 Severn Ave. Suite 210 Scyld Beowulf cluster system Annapolis MD 21403 410-990-9993