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Oracle RAC with EMC iSCSI Storage Panics

I have had a system panicking when running the mentioned below configuration: RedHat RHEL 4 Update 6 (4.6) 64bit (x86_64) Dell PowerEdge servers Oracle RAC 11g with Clusterware 11g EMC iSCSI storage EMC PowerPate Vote and Registry LUNs are accessible as raw devices Data files are accessible through ASM with libASM During reboots or shutdowns,…

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RedHat 4 working cluster (on VMware) config

I have been struggling with RH Cluster 4 with VMware fencing device. This was also a good experiance with qdiskd, the Disk Quorum directive and utilization. I have several conclusions out of this experience. First, the configuration, as is: <?xml version=”1.0″?> <cluster alias=”alpha_cluster” config_version=”17″ name=”alpha_cluster”> <quorumd interval=”1″ label=”Qdisk1″ min_score=”3″ tko=”10″ votes=”3″> <heuristic interval=”2″ program=”ping vm-server…

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VMware Fencing in RedHat Cluster 5 (RHCS5)

Cluster fencing – Unlike many common thoughts, high-availability is not the highest priority of an high-availability cluster, but only the 2nd one. The highest priority of an high-availability cluster is maintenance of data integrity by prevention of multiple concurrent access of nodes to the shared disk. On different cluster, depending on the vendor, this can…