Hi, I'd like to discuss and collect information about the two diffrent fencing approaches. external fencing: The failed cluster node is disconnected from the storage device by onother node in the cluster. After a failure detection all cluster activities are suspended until the IO fencing of the failed node has been completed successfully. watchdog fencing: A failed cluster node has to recognize the failure by itself and will be shut down by a kind of internal watchdog feature. Now, I see that theoretically the external fencing method (when configured correctly) is the betterer approach because of the exactly defined state during a fencing and recovery operation. But the question is: What are real world examples of failures when the watchdog fencing would fail and cause data corruption on the storage device ? I'd like to collect some real world examples and also theoretical approaches. All comments welcome ! Mark -- Gruss / Regards, Dipl.-Ing. Mark Hlawatschek http://www.atix.de/ http://www.open-sharedroot.org/ ** ATIX Informationstechnologie und Consulting AG -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
