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A customer needs to upgrade their 6 node Isilon cluster from OneFS 7.0 to OneFS 7.1 with minimal
disruption.
What would be the best way to upgrade the cluster?

A. Perform a simultaneous upgrade of all nodes

B. Perform a rolling upgrade of all nodes

C. Perform a simultaneous upgrade of 1 node at a time

D. Perform a rolling upgrade of 2 nodes at a time

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