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Posted to issues@ratis.apache.org by "Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org> on 2018/02/07 01:53:01 UTC

[jira] [Created] (RATIS-208) Allow client to specify replication level in a request

Tsz Wo Nicholas Sze created RATIS-208:
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             Summary: Allow client to specify replication level in a request
                 Key: RATIS-208
                 URL: https://issues.apache.org/jira/browse/RATIS-208
             Project: Ratis
          Issue Type: New Feature
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze


In Raft protocol, the leader sends a reply to client once the request is committed and applied to its state machine.  A request is committed when the leader get a majority of responses from all the members in the raft group.

In some applications, the client may want to wait for all member responses instead of a majority.  For example, the application wants to support reading even if there is only one machine remaining in the group.



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