If Eucalyptus Cluster controller crashs what will happen?

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I have 2 physical machines.
If I make cloud computing with Eucalyptus :

  • First physical machine will be Cloud controller, Cluster controller and Walrus controller
  • Second physical machine will be Node controller

If first physical machine crashs what will happen to my virtual machines without Cluster controller ?
If second physical machine crashs what will happen to my virtual machines without Node controller ?

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If first physical machine crashes, the VMs running on NC will be still alive. But if there are any volume attached to VM through EBS (provided by SC/Walrus running on first machine), the volume could not be accessible.

If NC/second machine crashes, All VMs running on this host will die!!

Hope this help