-----Original Message----- From: Andrea Laack [mailto:alaack@xxxxxxxxxx] Sent: Tuesday, February 12, 2008 12:54 PM To: 'linux-cluster@xxxxxxxxxx' Subject: cluster crash problem We are running RHEL 3.0 with version 1.0.3 of RedHat cluster suite. We are utilizing a Promise Vtrak 15200 for shared storage and an Adaptec ASA-7211C iSCSI initiator. Having problems with any process that uses high I/O across the iSCSI link. Last night dba attempted to create an Oracle instance on the shared storage device. The cluster crashed and failed over the the backup node. Nothing in the logs. Log level set at 6. Only indication I have that something happened is from the graphs of the disk I/O (HotSanic). This shows 69.42 Pentabytes (yes, it shows pentabytes). We are using a watchdog timer. This has happened before when copying *very* large amounts of data that includes *very* large files. Many small files does not cause the cluster to crash. Has anyone seen this type of problem? Any help will be sincerely appreciated. Adaptec will only talk to me if I pay them $199/phone call. Thanks Andrea Andrea Laack Network Administrator Universal Strap W209N17500 Industrial Drive Jackson, WI 53037 262-677-3641 Ext 5220 Thought I would answer my own questions in the hopes that it can be of use to someone else. Thanks to Lon Hohberger. His information in an email I found in the mail list archives sent me in the right direction. RedHat Knowledgebase gave the following suggestions. A high network traffic or load can cause an cluster node to miss a heartbeat. This will cause the node to be fenced. The following performance tuning settings were suggested: cludb -p clumembd%adaptive yes cludb -p clumembd%interval 2000000 cludb -p clumembd%tko_count 15 cludb -p clumembd%rtp 10 cludb -p cluquorumd%rtp 10 (Be sure to stop cluster services before making these changes.) I made the above changes and the problems were corrected. Thanks Andrea -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
