RAC重启主机条件

Oracle确实是霸道，稍不顺心，就重启一把主机。以下摘录为重启主机条件，满足任一条件，重启没商量！
Oracle clusterware has the following three daemons which may be responsible for panicing the node. It is possible that some other external entity may have rebooted the node. In the context of this discussion, we will assume that the reboot/panic was done by an Oracle clusterware daemon.

    * Oprocd – Cluster fencing module
    * Cssd – Cluster sychronization module which manages node membership
    * Oclsomon – Cssd monitor which will monitor for cssd hangs

    OPROCD This is a daemon that only gets activated when there is no vendor clusterware present on the OS. This daemon is also not activated to run on Windows/Linux. This daemon runs a tight loop and if it is not scheduled for 1.5 seconds, will reboot the node.
    CSSD This daemon pings the other members of the cluster over the private network and Voting disk. If this does not get a response for Misscount seconds and Disktimeout seconds respectively, it will reboot the node.
    Oclsomon This daemon monitors the CSSD to ensure that CSSD is scheduled by the OS, if it detects any problems it will reboot the node.

详见metalink 265769.1