DES-1423: Specialist - Implementation Engineer, PowerScale ExamDemo

By Dell · Question Mode

QuestionQ23

NAS, PowerScale, and OneFS

What distinguishes a rolling upgrade from a simultaneous upgrade in an Isilon cluster?

  • A Rolling updates take less time to complete.Simultaneous upgrades take longer to complete.
  • B Rolling updates are more disruptive.Simultaneous upgrades are less disruptive.
  • C Rolling updates are less disruptive.Simultaneous upgrades are more disruptive.
  • D Rolling updates are available between all OneFS versions.Simultaneous upgrades are restricted between certain OneFS versions.
Explanation

A rolling upgrade processes nodes incrementally, keeping other cluster nodes available to serve clients. A simultaneous upgrade restarts all nodes together, temporarily making the entire cluster unavailable for client connections; it is therefore more disruptive. Dell documents that simultaneous upgrades require a temporary service interruption and that client data is inaccessible until the cluster returns online.

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