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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Placement Group states

Ceph PGs may exhibit several states based on what's happening inside the cluster at that point in time. To know the state of a PG, you can see the output of the command ceph status. In this recipe, we will cover these different states of PGs and understand what each state actually means:

  • Creating: The PG is being created. This generally happens when pools are being created or when PGs are increased for a pool.
  • Active: All PGs are active, and requests to the PG will be processed.
  • Clean: All objects in the PG are replicated the correct number of times.
  • Down: A replica with necessary data is down, so the PG is offline (down).
  • Replay: The PG is waiting for clients to replay operations after an OSD has crashed.
  • Splitting ...

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