>>> Mark Kosmowski wrote: >>> >>> I have a small cluster too (ok, had, I'm condensing to one big RAM >>> workstation at the moment). Mine was a 3 node dual Opteron setup. >>> >>> The first trick is to get each node to be able to ssh to every other >>> node without getting a password prompt. It doesn't matter for the >>> calculation whether this is done by passwordless ssh or using some >>> keychain type applet. All that matters for the calculation is that >>> each node be able to ssh without prompt to each other node. This >>> means n! checks. For my 3 node baby cluster I did this manually, >>> since 3! is 6. More nodes - might want to make a script or something.
Here is a link for the keychain script I mentioned earlier: http://www.ibm.com/developerworks/library/l-keyc2/ >>> >>> >>> Here is an example with one-lined "script" for the ssh password less >>> logon: >>> >>> >>> http://wiki.neuralbs.com/index.php/Howto_Build_a_Basic_Gentoo_Beowulf_Cluster#Passwordless_Logon_to_the_Nodes_and_Node_List_Creation >>> >>> Next, you need to make your application parellel. This typically >>> involves compiling with some sort of MPI. I use OpenMPI. MPICH is >>> another option. This is going to be part of the learning curve. When >>> you can <mpirun hostname> and get an output for each CPU (each core?) >>> you're ready to start wrestling with an MPI compile of your >>> application code. >>> >>> If you're not used to compiling your own code, there may be a bit of a >>> learning curve for this also. >>> >>> >>> Well... once I "finish" my Google Summer of Code project, people like you >>> will have a fun playground with graphical examples (as well as serious >>> people for serious HPC...but they won't admit to that and keep using RH as >>> an OS :P) >>> >>> http://soc.gentooexperimental.org/projects/show/gentoo-cluster-seed >>> >>> Good luck! >>> >>> Mark E. Kosmowski >>> >>> >>> Enjoy, >>> >>> Eric Thibodeau >>> >>> Amir, >>> Did you try any of the documents referenced at >>> wiki,http://en.wikipedia.org/wiki/Beowulf_%28computing%29#See_also? >>> >>> There is a free downloadable book at Professor Brown's website, start >>> athttp://www.phy.duke.edu/~rgb/Beowulf/beowulf.php >>> <http://www.phy.duke.edu/%7Ergb/Beowulf/beowulf.php> >>> >>> And I believe yes, you can use SSH to replace RSH pretty much anywhere. I >>> haven't done that myself but I'm only a hobbyist. >>> >>> Good luck, >>> Peter >>> >>> >>> On 7/16/08, Amir Saad <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> wrote: >>> >>> >>> I'm trying to build a small Beowulf cluster using 5 Ubuntu machines. I did >>> a lot of search and yet couldn't find a getting started guide. Any ideas? >>> >>> All the articles I found are using RSH, is it possible to replace this with >>> password-less SSH? Would it be possible to use Ubuntu? Which packages should >>> I install to build the cluster? >>> >>> Please advice. >>> >>> Thank you >>> >>> Amir _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
