4.3.9. Addendum

Split-brain Syndrome

The split-brain syndrome may occur when all of the private links go down simultaneously, but the cluster nodes are still running, each one believing they are the only one running. The data sets of each cluster may then randomly serve clients by their own “idiosyncratic” data set updates, without any coordination with the other data sets.

If this occurs, shared storage may experience data corruption. If the storage pools are kept separate, data inconsistencies that require operator intervention and cleanup might arise.