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Posted to issues@ratis.apache.org by "Mukul Kumar Singh (JIRA)" <ji...@apache.org> on 2019/05/21 06:03:00 UTC

[jira] [Created] (RATIS-563) Purge logs after snapshot only after all the nodes have catught up with the index

Mukul Kumar Singh created RATIS-563:
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             Summary: Purge logs after snapshot only after all the nodes have catught up with the index
                 Key: RATIS-563
                 URL: https://issues.apache.org/jira/browse/RATIS-563
             Project: Ratis
          Issue Type: Bug
          Components: snapshot
    Affects Versions: 0.3.0
            Reporter: Mukul Kumar Singh


Leader will purge the snapshot after applying a transaction. A transaction is applied after a majority has been reached. This means that a slow follower will request for a transaction which has already been purged and for this transaction to catchup the leader has to transfer the snapshot. This can be detrimental for the performance while replicating.



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