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From "Paulo Motta (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-9876) One way targeted repair
Date Thu, 11 Aug 2016 18:21:20 GMT


Paulo Motta updated CASSANDRA-9876:
    Status: Ready to Commit  (was: Awaiting Feedback)

> One way targeted repair
> -----------------------
>                 Key: CASSANDRA-9876
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>            Assignee: Geoffrey Yu
>            Priority: Minor
>             Fix For: 3.x
>         Attachments: 9876-dtest-master.txt, 9876-trunk-v2.txt, 9876-trunk-v3.txt, 9876-trunk.txt
> Many applications use C* by writing to one local DC. The other DC is used when the local
DC is unavailable. When the local DC becomes available, we want to run a targeted repair b/w
one endpoint from each DC to minimize the data transfer over WAN.  In this case, it will be
helpful to do a one way repair in which data will only be streamed from other DC to local
DC instead of streaming the data both ways. This will further minimize the traffic over WAN.
This feature should only be supported if a targeted repair is run involving 2 hosts.

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