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NetApp Knowledge Base

What is a split brain in a MetroCluster configuration?

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Applies to

  • MetroCluster
  • ONTAP 9
  • Data ONTAP 8

Answer

In a MetroCluster configuration, a split-brain occurs when both sites are serving the same data.

For Example:

  • ClusterA is running in a normal state serving it's own data.
  • ClusterB has performed a Switchover and is serving both it's own data and ClusterA data.

This situation could occur if the communication between sites is lost, then a switchover on disaster is performed from one or both of the sites.

Always ensure that the remote cluster is down before performing a switchover on disaster operation.

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