Removing the last 3 nodes of a node type from an Isilon cluster

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In any Isilon cluster there is a requirement to have a minimum of 3 nodes for each type of node that is within the cluster. This rule begs the question of how to remove the last 3 nodes of a node type from a cluster.

What are my options for evacuating the data on the 3 nodes that will be removed from the cluster?

  1. SmartPools – A file pool policy can be created to move all data to the other nodes in the cluster. Simply create a new file pool policy that moves everything under /ifs to the tier/pool that will remain in the cluster.

Note: If all of your pools are in a single tier you will need to remove one of the pools from the tier before you can create the SmartPool file policy. Pools can safely be removed from a tier at any time.

  1. SmartFail – This method will not work. The first node you SmartFail will start to evacuate it’s data to the other 2 nodes remaining in the cluster that are the same type. Eventually those 2 nodes will fill up and the SmartFail job will hang.

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