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PowerScale OneFS Upgrade Planning and Process Guide

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Completing a rolling upgrade of OneFS

If you perform a rolling upgrade, the OneFS cluster nodes are restarted one at a time. During a rolling upgrade, client connections to the restarting node are disconnected, but other nodes remain available for client connection.

NOTE:When you perform a rolling upgrade between OneFS releases, you can upgrade all the nodes in the cluster, or you can select specific nodes to upgrade. If you upgrade only some of the nodes, the remaining nodes in the cluster are not upgraded but can be upgraded later in the upgrade process. The upgrade is not complete until all nodes are upgraded, and only one upgrade can be in progress at a time. You cannot upgrade some nodes to one version of OneFS and then upgrade another group of nodes to a different version of OneFS.

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