Fwd: Questions regarding mds early reply

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Hi,

      When reading the early reply logical,  i am not very understand
why we can reply to the client before committing to journal?  Is there
anywhere the change get persisted or we rely on client-replay when MDS
failure happens?
      If this is the case, what if the client also failed during this period?

      Thanks for providing the hints.

Xiaoxi
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