Oracle Technologies Blog


How to Set MissCount,RebootTime and DiskTimeout for CSS

Posted by Srikrishna Murthy Annam on March 25, 2010

MissCount: The MissCount is the maximum time, in seconds, that a cluster heartbeat (messages sent between nodes over the network interconnect or through voting disk; the prime indicator of connectivity), can be missed before entering into a cluster reconfiguration to evict the node.

RebootTime:(default 3 seconds) -the amount of time allowed for a node to complete a reboot after the CSS daemon has been evicted. (I.E. how long does it take for the machine to completely shutdown when you do a reboot -f -n)

DiskTimeout:(default 200 seconds) -the maximum amount of time allowed for a voting file I/O to complete; if this time is exceeded the voting disk will be marked as offline. Note that this is also the amount of time that will be required for initial cluster formation, i.e. when no nodes have previously been up and in a cluster.

Setting the parameters :

  1. shut down CRS on all nodes but one as root run crsctl on that remaining node
  2. $CRS_HOME/bin/crsctl set css misscount <n> [-force] (<n> is seconds)
  3. $CRS_HOME/bin/crsctl set css reboottime <r> [-force](<r> is seconds)
  4. $CRS_HOME/bin/crsctl set css disktimeout <d> [-force](<d> is seconds)
  5. reboot the remaining node (the node where you just made the change)
  6. restart all other nodes and Confirm the new settings via ocrdump.

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