On Wed, 23 Oct 2007, Gordon wrote: 2) Thanks for the report on NFSv3/UDP. From my reading that sounded like something to avoid, but maybe I need to try it anyway. How reliable has it been? Do the clients reconnect most times? In your case, NFS over TCP is likely to have been the major cause of your problems. UDP can fail over much more transparently, because there is no state to it to expire. You could also try tweaking your timeout, retry, and hard vs. soft failure modes on NFS. Gordan ------------------------------------------------------------------------ ---------------- I found the major stability issue. Using managed IP *BAD*, using managed NFS ok. I had the nfs service running on all the nodes and just failed the IP over. It does not matter if you use UDP or TCP, the managed IP is flaky. Using managed NFS over TCP was still a bit unstable but not nearly as bad as the managed IP. So what I have settled on for my testbed: 64bit AMD Opteron CentOS 5.0 SAN with brocade switch and storage arrays GFS1 Managed NFS UDP over NFS I will be doing stability testing over the next couple weeks and will post my findings. If the stability is good my testbed goes live before the end of the year. Thanks for all the hard work on RHCS :) Tim ***************************************************************** This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail. ******************************************************************* -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
