Try doing "ssh -vvv" from the head to the compute nodes and see where it is timing out. Cexec just uses ssh, so this should help diagnose the problem.
What network cards and switch are you using? It is possible that there is a driver/bios issue with your networking hardware... On 7/13/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Hello, I have been through the lists and have seen a couple of posts > similar to this. I have tried the resolutions but to no avail. > > Here is my oscar environment: > > 1) 1 head node and 22 computes (all running rhel4 u4, using oscar 5.0) > 2) oscar installation went well, computes functioning fine > 3) head node: 2 nics, eth0 external 130.127.X.X, eth1 172.16.0.100, > running NAT for computes traffic outside the network > 4) head and computes are NIS and NFS clients > > Operability: > > 1) head node and computes can mount nfs drives and ypbind starts for NIS > 2) NIS users can log in (although ypbind has started to become sporatic). > 3) NIS users can submit jobs to PBS. > > Situation: > > 1) Using head node LOCAL root account, ssh'ing into computes starts to get > slow after setting up NIS. CEXEC also is very slow. > 2) When login to computer as local root, get > > do_ypcall: clnt_call: RPC: Timed out > > 3) Also get > > do_ypcall: clnt_call: RPC: Timed out; errno=cannot send > > Questions: > > NIS is functional. Users can log in. Cexec is basically inoperable, too > slow. Has someone had this problem? I know I might get a iptables > response (NFS and NIS is operational, so packets are going outside the > cluster). Is there an OSCAR setting that might be slowing cexec down? Or > is something else? > > NOTE: NO computes have /etc/resolv.conf. I saw a solution to something > like this. All computes can ping NIS server and NFS servers. > > Thanks for any help. > > Vince > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Oscar-users mailing list > Oscar-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/oscar-users > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Oscar-users mailing list Oscar-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oscar-users
