OpenSSI can migrate processes to the least busy node. OpenMosix does the same. If you're not interested in making such a drastic change to your cluster some sort of job scheduler would accomplish this as well. The benefit of this is that if you foresee your environment becoming heterogenous (suppose you want to try combining IA32 and 64bit architectures), a job scheduler can act as a front end and send jobs to the appropriate platform/architecture. This type of solution would require some user- education (I'd just assume write a wrapper for the apps so that they go through the queueing system). -Steve -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Reuben D. Budiardja Sent: Friday, August 20, 2004 10:13 AM To: redhat-list@xxxxxxxxxx Subject: Simple Load-balancing Hi all, I need some suggestions on how to do this, or some poimter in the right direction. I tried to STW, but most of the stuffs that I found is too involved or complicated, I think. Here's the situation. I have a beowulf linux cluster that we primarilly use for parallel computing using MPI. Assume there are 4 nodes in cluster, called node1, node2, etc. Only node1 is can see the world, so from outside, people can only do 'ssh node1'. Then after that, they can go to any other nodes since the nodes are in a LAN. /home is NFS mounted across all nodes. However, people also uses this cluster to run application, and executables that does not need parallel computing. The problem is, people would do 'ssh node1', then run X apps or executable there. This makes nodes1 the busiest nodes all the time, while other nodes idle (if there are no parallel job). What I'd like to do is to distribute this load automatically. Since all the nodes are homogenous, for most apps and executables it can be run in any nodes. This may not be so hard if that's all there is to it. The problem is, some program only exist and can be started from node1, ie. we have some compilers with only 1 license, thus only exist in node1, parallel job with mpi can only be started from the master node (node1). So, how do I do: 1. If user just do 'ssh node1' from outside, the user will automatically be 'transferred' to the most available node, so that the user run applications from that less busy node. 2. If this user really knows that the program s/he needs only exist in node1, or want to start parallel job, the user can do something like 'ssh node1 -notransfer', or any other option so that for sure the user gets to node1. Any suggestion? Thanks in advance RDB -- Reuben D. Budiardja Dept. Physics and Astronomy University of Tennesse, Knoxville, TN -----BEGIN GEEK CODE BLOCK----- Version: 3.12 GIT/M/MU/P/S d-(++) s: a-- C++(+++) UL++++ P-- L+++>++++ E- W+++ N+ o? K- w--- !O M- V? !PS !PE Y PGP- t+ 5 X R- tv+ b++>+++ DI D(+) G e++>++++ h+(*) r++ y->++++ ------END GEEK CODE BLOCK------ -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
