[jira] [Updated] (CASSANDRA-9143) Fix consistency of incrementally repaired data across replicas

["Michael Semb Wever (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-9143?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Semb Wever updated CASSANDRA-9143:
------------------------------------------
            Component/s: Consistency/Repair
    Source Control Link: https://github.com/apache/cassandra/commit/98d74ed998706e9e047dc0f7886a1e9b18df3ce9

> Fix consistency of incrementally repaired data across replicas
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-9143
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9143
>             Project: Apache Cassandra
>          Issue Type: Improvement
>          Components: Consistency/Repair
>            Reporter: Sankalp Kohli
>            Assignee: Blake Eggleston
>            Priority: Normal
>             Fix For: 4.0-alpha1, 4.0
>
>
> We currently send an anticompaction request to all replicas. During this, a node will split stables and mark the appropriate ones repaired. 
> The problem is that this could fail on some replicas due to many reasons leading to problems in the next repair. 
> This is what I am suggesting to improve it. 
> 1) Send anticompaction request to all replicas. This can be done at session level. 
> 2) During anticompaction, stables are split but not marked repaired. 
> 3) When we get positive ack from all replicas, coordinator will send another message called markRepaired. 
> 4) On getting this message, replicas will mark the appropriate stables as repaired. 
> This will reduce the window of failure. We can also think of "hinting" markRepaired message if required. 
> Also the stables which are streaming can be marked as repaired like it is done now. 



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