Beowulf digest, Vol 1 #540 - 16 msgs
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tlioner tlioner at 263.netFri Aug 24 05:02:45 PDT 2001
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Send Beowulf mailing list submissions to beowulf at beowulf.org To subscribe or unsubscribe via the web, visit http://www.beowulf.org/mailman/listinfo/beowulf or, via email, send a message with subject or body 'help' to beowulf-request at beowulf.org You can reach the person managing the list at beowulf-admin at beowulf.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Beowulf digest..." Today's Topics: 1. RE:Need to do something Useful (Eric T. Miller) 2. Channel Bonding (Michael Sowka) 3. Re:Channel Bonding (Rocky McGaugh) 4. Re:Need to do something Useful (Pedro =?iso-8859-1?q?D=EDaz=20Jim=E9nez?=) 5. RE:Need to do something Useful (Kim Branson) 6. MPICH on RedHat 7.1 (William R. Pearson) 7. Re:Anyone use Alpha 500a to form a beowulf cluster ? (Ron Chen) 8. Re:Anyone use Alpha 500a to form a beowulf cluster ? (Patrick Geoffray) 9. Socket Migration (Amber Palekar) 10. Network RAM for Beowulf (Amber Palekar) 11. Re:Network RAM for Beowulf (Felix Rauch) 12. Re:Network RAM for Beowulf (Horatio B. Bogbindero) 13. RE:Need to do something Useful (Luc Vereecken) 14. Re:Network RAM for Beowulf (Robert G. Brown) 15. Re:Network RAM for Beowulf (Amber Palekar) 16. Re:Channel Bonding (Jared Hodge) --__--__-- Message: 1 From: "Eric T. Miller" <emiller at techskills.com> To: "Lambe, Dave" <dave.lambe at targacept.com>, "Beowulf \(E-mail\)" <beowulf at beowulf.org> Subject: RE: Need to do something Useful Date: Wed, 15 Aug 2001 13:13:08 -0400 charset="iso-8859-1" >About 2 months ago, I setup a small cluster using Scyld. The >developers/programmers have been keyholed into another project for the time >being. I would like to do something with the cluster as it's just using >electricity & creating heat. >Is there a way to fire up dnetc (or similar) on all the nodes? I apologize >for my lack of *nix knowledge (I'm a hardware/setup guy). TIA > > >Dave Yes! I had a similar question about a week ago that didn't get much response. I too am new to clusters, and I just want to do something useful and interesting with my new creation. It is currently just a very intelligent space heater. --__--__-- Message: 2 Date: Wed, 15 Aug 2001 14:00:20 -0400 From: Michael Sowka <msowka at doe.carleton.ca> To: beowulf at beowulf.org Subject: Channel Bonding Hello, I was hoping someone could point me in the right direction with some question I have about channel bonding. Linux kernel side seems to be easy enough with the CONFIG_BONDING=Y and other "various" /etc stuff... but what about the switches?! In the kernel Configuration Documentation it mentions something like a Cisco 5500 switch... I looked it up and it seems that the 5000 series switches are the "standard" for what Cisco calls Etherchannel (Channel bonding = Etherchannel). Now I sorta' assume that's an expensive piece of equipment, and the goal of our little project here is to build a very VERY "Class I" system (read: cheap, VERY off the shelf equipment)... won't a simple 300$ 8-port switch do??? Thanks for any comment and pointers, Mike -- /************************************************************************\ | Mike Sowka o _ _ _ | | An Aspiring Engi"Nerd" _o /\_ _ \\o (_)\__/o (_) | | Carleton University _< \_ _>(_) (_)/<_ \_| \ _|/' \/ | | msowka at doe.carleton.ca (_)>(_) (_) (_) (_) (_)' _\o_ | | (home msowka at home.com) | \************************************************************************/ --__--__-- Message: 3 Date: Wed, 15 Aug 2001 13:37:16 -0500 (CDT) From: Rocky McGaugh <rmcgaugh at atipa.com> To: <beowulf at beowulf.org> Subject: Re: Channel Bonding On Wed, 15 Aug 2001, Michael Sowka wrote: > Hello, > I was hoping someone could point me in the right direction with some > question I have about channel bonding. Linux kernel side seems to be > easy enough with the CONFIG_BONDING=Y and other "various" /etc stuff... > but what about the switches?! In the kernel Configuration Documentation > it mentions something like a Cisco 5500 switch... I looked it up and it > seems that the 5000 series switches are the "standard" for what Cisco > calls Etherchannel (Channel bonding = Etherchannel). Now I sorta' assume > that's an expensive piece of equipment, and the goal of our little > project here is to build a very VERY "Class I" system (read: cheap, VERY > off the shelf equipment)... won't a simple 300$ 8-port switch do??? > Thanks for any comment and pointers, > Mike > > Actually, 2 of the 8-port switches will work for 8 nodes, or 2 four ports for 4 machines. Main consideration is that both nics will present the same MAC address to the switch, and you cant have 2 nics with the same MAC address on the same wire without special support. If you put all of eth0 on one switch, and all of eth1's on the other, then this will work. -- Rocky McGaugh Atipa Technologies rocky at atipatechnologies.com rmcgaugh at atipa.com 1-800-360-4346 x3110 http://1087800222/ perl -e 'print unpack(u, ".=W=W+F%T:7!A+F-O;0H`");' --__--__-- Message: 4 charset="iso-8859-1" From: Pedro =?iso-8859-1?q?D=EDaz=20Jim=E9nez?= <pdiaz88 at terra.es> To: "Eric T. Miller" <emiller at techskills.com>, "Lambe, Dave" <dave.lambe at targacept.com>, "Beowulf \(E-mail\)" <beowulf at beowulf.org> Subject: Re: Need to do something Useful Date: Wed, 15 Aug 2001 21:10:26 +0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Some ideas: Interested in chess? -> distributed chess engine Interested in crypto? -> Crack RSA keys. -> Search collisions in MACs -> Help distributed.net -> Do your own effort to brute-force DES (If you have time :-) -> Create your very own parallel version of GnuPG -> Implement a parallel pseudorandom number generator Interested in multimedia? -> Distributed audio/video encoder Interested in simulation? -> Implement a parallel nbody simulator -> Have a look at your physics books, sure you'll find something you would want to do in parallel -> Write a parallel implementation of Conway game of life Interested in maths? -> Write a parallel fractal renderer -> Find primes -> help GIMPS -> Have a look at your math books, sure you'll find something you would want to do in parallel Are you at a university?. Take a look at what other departments are doing. Get involved if possible. Be curious. Buy a good book and learn about parallel algorithms. Just some thoughts Pedro P.S.: I you achieve something interesting, drop me an email! :-) On Wednesday 15 August 2001 17:13, Eric T. Miller wrote: > >About 2 months ago, I setup a small cluster using Scyld. The > >developers/programmers have been keyholed into another project for the > > time being. I would like to do something with the cluster as it's just > > using electricity & creating heat. > >Is there a way to fire up dnetc (or similar) on all the nodes? I apologize > >for my lack of *nix knowledge (I'm a hardware/setup guy). TIA > > > > > >Dave > > Yes! I had a similar question about a week ago that didn't get much > response. I too am new to clusters, and I just want to do something useful > and interesting with my new creation. It is currently just a very > intelligent space heater. > > > _______________________________________________ > Beowulf mailing list, Beowulf at beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf - -- /* * Pedro Diaz Jimenez: pdiaz88 at terra.es, pdiaz at acm.asoc.fi.upm.es * * GPG KeyID: E118C651 * Fingerprint: 1FD9 163B 649C DDDC 422D 5E82 9EEE 777D E118 C65 * * http://planetcluster.org * Clustering & H.P.C. news and documentation * * "Impossible is the adjective of the idiots" * Napoleon Bonaparte */ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE7euVInu53feEYxlERAm+aAJoCFdCzBzShU5VIE+3GsGPCSsomwACfT3YV raWZBra2FoZrS/oHDymXW3c= =Pcny -----END PGP SIGNATURE----- --__--__-- Message: 5 Date: Thu, 16 Aug 2001 09:18:14 +1000 (EST) From: Kim Branson <bra369 at pp.molsci.csiro.au> To: "Eric T. Miller" <emiller at techskills.com> cc: "Lambe, Dave" <dave.lambe at targacept.com>, "Beowulf (E-mail)" <beowulf at beowulf.org> Subject: RE: Need to do something Useful Of you like you could install globus on your machine and we can add it to our global grid for drug design applications. see http://www.csse.monash.edu.au/~rajkumar/vlab/index.html for more details. We are interested in designing small molecule atagonists for malaria and leishmania. failing that theres always seti or something.... kim ______________________________________________________________________ Kim Branson Structural Biology Walter and Eliza Hall Institute Royal Parade, Parkville, Melbourne, Victoria Ph 61 03 9662 7136 Email kbranson at wehi.edu.au ______________________________________________________________________ On Wed, 15 Aug 2001, Eric T. Miller wrote: > > >About 2 months ago, I setup a small cluster using Scyld. The > >developers/programmers have been keyholed into another project for the time > >being. I would like to do something with the cluster as it's just using > >electricity & creating heat. > >Is there a way to fire up dnetc (or similar) on all the nodes? I apologize > >for my lack of *nix knowledge (I'm a hardware/setup guy). TIA > > > > > >Dave > > > Yes! I had a similar question about a week ago that didn't get much > response. I too am new to clusters, and I just want to do something useful > and interesting with my new creation. It is currently just a very > intelligent space heater. > > > _______________________________________________ > Beowulf mailing list, Beowulf at beowulf.org > To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf > --__--__-- Message: 6 Date: Wed, 15 Aug 2001 19:45:23 -0400 (EDT) From: "William R. Pearson" <wrp at alpha0.bioch.virginia.edu> To: beowulf at beowulf.org Subject: MPICH on RedHat 7.1 Last week, I posted a question asking whether others had had problems with MPICH 1.2.1 on RedHat 7.1. Thanks to help from the MPICH folks (mpi-bugs at anl.gov), I was able to identify a misconfiguration in my /etc/hosts file (all localhosts had the name of the machine I cloned from). Fixing the misconfiguration fixed the problem, and my MPICH programs run fine under RH7.1 Bill Pearson --__--__-- Message: 7 Date: Wed, 15 Aug 2001 18:14:48 -0700 (PDT) From: Ron Chen <ron_chen_123 at yahoo.com> Subject: Re: Anyone use Alpha 500a to form a beowulf cluster ? To: MICHAELCHEN <Yiping.Cheng at etatung.com.tw>, beowulf at beowulf.org What problems did you encounter? There are many research labs using Alpha Linux for their beowulf clusters. See: http://www.beowulf.org/ (e.g. University of Wisconsin-Milwaukee, Viscoelastic Group at Universite' catholique de Louvain, Center for Atomic-Scale Materials Physics) The question is, what kind of jobs do you run? If all you want is simple batch jobs, you don't even need to modify the kernel, all you need is a batch system, like PBS (Portable Batch System), or SGE (Sun Grid Engine). The batch system will glue all the machines together: when a machine is free, the daemons of the batch system will dispatch a job to the machine. So all the machine in your company can be used at night for batch jobs while the users get their machine back in the morning. (This is ideal for simulations for EDA, DNA sequencing, etc) SGE: http://gridengine.sunsource.net/project/gridengine/download.html http://www.sun.com/gridware PBS: http://www.openpbs.com http://www.pbspro.com Both PBS and SGE are free, opensource, and support Alpha Linux. If you want to run parallel jobs (like PVM or MPICH), then you can also use the batch systems to schedule the jobs. However, TCP/IP and Ethernet is not fast enough for message passing, so you may need to install SCORE and Myrinet. Tell us want you need :-) -Ron --- MICHAELCHEN <Yiping.Cheng at etatung.com.tw> wrote: > Hi ! > I am in trouble . > my HW : Alpha 500a > OS : RedHat 7.0 > MPI : MPICH 1.2.0 > Compiler : gcc , f77 > > any body use this cnfiguration ? > > can you share the experience with me ? > > tks. > > _______________________________________________ > Beowulf mailing list, Beowulf at beowulf.org > To change your subscription (digest mode or > unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ --__--__-- Message: 8 Date: Thu, 16 Aug 2001 00:27:35 -0400 From: Patrick Geoffray <patrick at myri.com> Reply-To: patrick at myri.com Organization: Myricom Inc To: Ron Chen <ron_chen_123 at yahoo.com> CC: MICHAELCHEN <Yiping.Cheng at etatung.com.tw>, beowulf at beowulf.org Subject: Re: Anyone use Alpha 500a to form a beowulf cluster ? Ron Chen wrote: > If all you want is simple batch jobs, you don't even > need to modify the kernel, all you need is a batch > system, like PBS (Portable Batch System), or SGE (Sun > Grid Engine). Can you imagine a cluster without a batch queue system ? You seem to present it as the most important component. I mean a batch queue may be nice and usefull, but I know a lot of machines without one. All of you > If you want to run parallel jobs (like PVM or MPICH), > then you can also use the batch systems to schedule > the jobs. However, TCP/IP and Ethernet is not fast > enough for message passing, so you may need to install > SCORE and Myrinet. TCP/IP and Ethernet are good enough for a lot of usage, including message passing. It's certainely the cheapest and easiest way to implement message passing. BTW, you can use Myrinet without Score, or even Score without Myrinet. Patrick ----------------------------------------------------------- | Patrick Geoffray, Ph.D. patrick at myri.com | | Myricom, Inc. http://www.myri.com | | Cell: 865-389-8852 325 N. Santa Anita Ave. | | Fax: 865-974-1950 Arcadia, CA 91006 | ----------------------------------------------------------- --__--__-- Message: 9 Date: Thu, 16 Aug 2001 02:11:38 -0700 (PDT) From: Amber Palekar <amber_palekar at yahoo.com> Subject: Socket Migration To: beowulf at beowulf.org Hi, I , along with my three friends , am planning to implement TCP/IP Socket Migration for a distributed system ( MOSIX in particular and thats why a kernel level implementation of the same ). We have been looking for papers for the same .But it seems that not much papers are out as yet . So any body with any information or pointers for the same plz let me know ASAP . that would really be of great help to us. Thanks in advance. Amber __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ --__--__-- Message: 10 Date: Thu, 16 Aug 2001 02:34:31 -0700 (PDT) From: Amber Palekar <amber_palekar at yahoo.com> Subject: Network RAM for Beowulf To: beowulf at beowulf.org hi, we as a group of four students are *also* thinking of implementing Network RAM for a beowulf cluster (assuming 100Mbps Ethernet ) whereby each node in the cluster will donate some part of their RAM to be used by all other nodes.so we will basically be mapping this shared RAM to the address space of the current node.One of the uses that we're thinking of is for Journaling(as in file systems ).We'll be maintaining the journals on the Network RAM instead of writing them to the local disks.As we are completely new to this , it is very difficult for us to determine the statistics like :- the overhead in writing to Network RAM . Any info or pointers to these stats would be highly appreciated . TIA Amber __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ --__--__-- Message: 11 Date: Thu, 16 Aug 2001 12:07:13 +0200 (CEST) From: Felix Rauch <rauch at inf.ethz.ch> To: Amber Palekar <amber_palekar at yahoo.com> cc: beowulf at beowulf.org Subject: Re: Network RAM for Beowulf On Thu, 16 Aug 2001, Amber Palekar wrote: > we as a group of four students are *also* thinking > of implementing Network RAM for a beowulf cluster > (assuming 100Mbps Ethernet ) whereby each node in the > cluster will donate some part of their RAM to be used > by all other nodes.so we will basically be mapping > this shared RAM to the address space of the current > node. If I understand you right, then you want to do Distributed Shared Memory (DSM). A similar project is TreadMarks, so [1] might be interesting for you. Regards, Felix [1] http://www.cs.rice.edu/~willy/TreadMarks/overview.html -- Felix Rauch | Email: rauch at inf.ethz.ch Institute for Computer Systems | Homepage: http://www.cs.inf.ethz.ch/~rauch/ ETH Zentrum / RZ H18 | Phone: ++41 1 632 7489 CH - 8092 Zuerich / Switzerland | Fax: ++41 1 632 1307 --__--__-- Message: 12 Date: Thu, 16 Aug 2001 18:45:39 +0800 From: "Horatio B. Bogbindero" <wyy at cersa.admu.edu.ph> To: Amber Palekar <amber_palekar at yahoo.com> Cc: beowulf at beowulf.org Subject: Re: Network RAM for Beowulf Reply-To: wyy at admu.edu.ph protocol="application/pgp-signature"; boundary="Qxx1br4bt0+wmkIi" Organization: Ateneo Cervini-Eliazo Networks --Qxx1br4bt0+wmkIi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 16, 2001 at 02:34:31AM -0700, Amber Palekar wrote (wyy sez): > we as a group of four students are *also* thinking > of implementing Network RAM for a beowulf cluster > (assuming 100Mbps Ethernet ) whereby each node in the > cluster will donate some part of their RAM to be used > by all other nodes.so we will basically be mapping > this shared RAM to the address space of the current > node.One of the uses that we're thinking of is for > Journaling(as in file systems ).We'll be maintaining > the journals on the Network RAM instead of writing > them to the local disks.As we are completely new to > this , it is very difficult for us to determine the > statistics like :- the overhead in writing to Network > RAM . Any info or pointers to these stats would be > highly appreciated . sounds like a very good project. but, i have heard of projects that are trying to do distributed shared memory. i think the mosix people have something going on http://www.mosix.org/. but, in anycase, i would also like know about this. i am interested in using a system with distributed shared memory.=20 -------------------------------------- William Emmanuel S. Yu Ateneo Cervini-Eliazo Networks (ACENT) email : william.s.yu at ieee.org web : http://cersa.admu.edu.ph phone : 63(2)4266001-5925/5904 GPG : http://sysads.ateneo.net/wyu/wyy.pgp =20 One man tells a falsehood, a hundred repeat it as true. =20 --Qxx1br4bt0+wmkIi Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.5 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE7e6RSOgIOlr0CsAERAovHAKCmYBMzuLbfqpSXAoNjKVq3FzKrnACgzcK9 okdVb0b3LArbWtrBEZpPe1A= =oZRm -----END PGP SIGNATURE----- --Qxx1br4bt0+wmkIi-- --__--__-- Message: 13 Date: Thu, 16 Aug 2001 14:09:33 +0200 To: Kim Branson <bra369 at pp.molsci.csiro.au>, "Eric T. Miller" <emiller at techskills.com> From: Luc Vereecken <Luc.Vereecken at chem.kuleuven.ac.be> Subject: RE: Need to do something Useful Cc: "Lambe, Dave" <dave.lambe at targacept.com>, "Beowulf (E-mail)" <beowulf at beowulf.org> csiro.au> For distributed computing, check out the list of projects given on Kirk Pearson's webpage : http://www.aspenleaf.com/distributed/ Everything from SETI over Dnet to golem at home and UD-cancer is listed there. Luc Vereecken --__--__-- Message: 14 Date: Thu, 16 Aug 2001 08:38:05 -0400 (EDT) From: "Robert G. Brown" <rgb at phy.duke.edu> To: Amber Palekar <amber_palekar at yahoo.com> Cc: <beowulf at beowulf.org> Subject: Re: Network RAM for Beowulf On Thu, 16 Aug 2001, Amber Palekar wrote: > hi, > we as a group of four students are *also* thinking > of implementing Network RAM for a beowulf cluster > (assuming 100Mbps Ethernet ) whereby each node in the > cluster will donate some part of their RAM to be used > by all other nodes.so we will basically be mapping > this shared RAM to the address space of the current > node.One of the uses that we're thinking of is for > Journaling(as in file systems ).We'll be maintaining > the journals on the Network RAM instead of writing > them to the local disks.As we are completely new to > this , it is very difficult for us to determine the > statistics like :- the overhead in writing to Network > RAM . Any info or pointers to these stats would be > highly appreciated . Check out the Trapeze project at Duke: http://www.cs.duke.edu/ari/trapeze/ This is a high end version of the project you are suggesting. I suspect that you can implement a simpler (but slower) version of this out of component parts with existing kernels (or almost so). If current kernels support swap over NFS, for example, you can build a large ramdisk on each node (and otherwise leave them just enough memory to function comfortably without swapping) and export them all to a central node for use as swap. This would effectively extend the size of VM on the central node, but swapping would occur at network-limited speeds instead of disk-hardware limited speeds. And of course you can definitely export a set of ramdisks and NFS mount them for regular "network bound" file I/O, and might even be able to glue them together into a big striped filesystem (I don't think md will to this, but you MIGHT be able to hack it so that it would). Disk bandwidth, of course, has gotten much better over the years that this might not make sense from a raw BW point of view. For something doing a lot of random accesses to disk, though, where the performance is dominated by latency, might well benefit as the combination of memory latency on the nodes plust network latency plus NFS latency will still likely be an order of magnitude less than the seek time on a disk (which requires the physical movement of big chunks of mass). Order of milliseconds for a disk seek, order of 100 microseconds for the network+memory hit, a rough factor of ten improvement. Note that even if you hack the kernel and eliminate all the kludginess from this approach (NFS swap?), you're still going to be limited by raw socket latency and will therefore probably not improve on this estimate by as much as a factor of 2. Of course this works another order of magnitude better with Myrinet (used in the Duke project) with latency less than 10 microseconds and even the BW compares decently with local disk. This is the primary motivation for this project -- creating very large network-distributed ramdisk-like storage with a very low level (and hence efficient) implementation. The PRIMARY place where this is useful is in projects that require far more memory and/or faster (lower latency) disk than one can physically add to a system, as it will almost always be cheaper and better to add memory to a local system than to build a network of virtual memory IF you can get to the desired memory regime by adding sticks to your own box. This is especially true now with memory prices in free fall (512MB PC2100 DDR only $168 as of this morning on pricewatch.com -- it was over $600 at the beginning of the summer -- and 512MB PC133 only >>$30<< ditto). Ditto with disk BW -- high end disk storage units now can provide quite a lot of BW (with terrible latency of course). Building a system with (say) 10 GB of network/virtual memory is a lot more challenging. To start with, this is more than the unhacked kernel can address, I believe. So there you'd need to build BOTH the socket-based memory subsystem AND hack the kernel so that it could somehow address it. You should definitely look over the Trapeze site to see how they attempt to finesse this problem via a higher level API (if I understand their papers). That is, they don't tamper with the existing VM so much as to graft a set of hooks into a special library so that the remote "memory" can be accessed via a file interface. Or something like that. You'll need to read about it yourself, and might even want to talk to the primary researchers as they'd likely have some very sensible suggestions and direction to give you. rgb > TIA > Amber > > __________________________________________________ > Do You Yahoo!? > Make international calls for as low as $.04/minute with Yahoo! Messenger > http://phonecard.yahoo.com/ > > _______________________________________________ > Beowulf mailing list, Beowulf at beowulf.org > To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf > -- Robert G. Brown http://www.phy.duke.edu/~rgb/ Duke University Dept. of Physics, Box 90305 Durham, N.C. 27708-0305 Phone: 1-919-660-2567 Fax: 919-660-2525 email:rgb at phy.duke.edu --__--__-- Message: 15 Date: Thu, 16 Aug 2001 06:48:36 -0700 (PDT) From: Amber Palekar <amber_palekar at yahoo.com> Subject: Re: Network RAM for Beowulf To: beowulf at beowulf.org --- Felix Rauch <rauch at inf.ethz.ch> wrote: > If I understand you right, then you want to do > Distributed Shared > Memory (DSM). yes i am talkin about DSM . we are also thinking about implementing Network RAM for introducing asynchronous writes ( i.e. converting a synchronous write on a secondary storage device to an async write on the Network RAM but thats too vague ) also we are thinking of using Network RAM for swap space , for process migration but that too are very raw ideas as of now . still we will be working on it. The problem we are facing is getting the stats related to Network RAM . so plz HELP !!!! :) Amber __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/ --__--__-- Message: 16 Date: Thu, 16 Aug 2001 09:19:19 -0500 From: "Jared Hodge" <jared_hodge at iat.utexas.edu> To: Rocky McGaugh <rmcgaugh at atipa.com> CC: beowulf at beowulf.org Subject: Re: Channel Bonding I thought the MAC was determined by the NIC (which would mean it would vary from NIC to NIC even if in the same machine). I may be wrong. Rocky McGaugh wrote: > > On Wed, 15 Aug 2001, Michael Sowka wrote: > > > Hello, > > I was hoping someone could point me in the right direction with some > > question I have about channel bonding. Linux kernel side seems to be > > easy enough with the CONFIG_BONDING=Y and other "various" /etc stuff... > > but what about the switches?! In the kernel Configuration Documentation > > it mentions something like a Cisco 5500 switch... I looked it up and it > > seems that the 5000 series switches are the "standard" for what Cisco > > calls Etherchannel (Channel bonding = Etherchannel). Now I sorta' assume > > that's an expensive piece of equipment, and the goal of our little > > project here is to build a very VERY "Class I" system (read: cheap, VERY > > off the shelf equipment)... won't a simple 300$ 8-port switch do??? > > Thanks for any comment and pointers, > > Mike > > > > > > Actually, 2 of the 8-port switches will work for 8 nodes, or 2 four > ports for 4 machines. Main consideration is that both nics will present > the same MAC address to the switch, and you cant have 2 nics with the same > MAC address on the same wire without special support. If you put all of > eth0 on one switch, and all of eth1's on the other, then this will work. > > -- > Rocky McGaugh > Atipa Technologies > rocky at atipatechnologies.com > rmcgaugh at atipa.com > 1-800-360-4346 x3110 > http://1087800222/ > perl -e 'print unpack(u, ".=W=W+F%T:7!A+F-O;0H`");' > > _______________________________________________ > Beowulf mailing list, Beowulf at beowulf.org > To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf -- Jared Hodge Institute for Advanced Technology The University of Texas at Austin 3925 W. Braker Lane, Suite 400 Austin, Texas 78759 Phone: 512-232-4460 Fax: 512-471-9096 Email: Jared_Hodge at iat.utexas.edu --__--__-- _______________________________________________ Beowulf mailing list Beowulf at beowulf.org http://www.beowulf.org/mailman/listinfo/beowulf End of Beowulf Digest
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