[jira] [Updated] (CASSANDRA-20581) Improved observability in AutoRepair to report both expected vs. actual repair bytes and expected vs. actual keyspaces

["Jaydeepkumar Chovatia (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-20581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jaydeepkumar Chovatia updated CASSANDRA-20581:
----------------------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Triage Needed)

> Improved observability in AutoRepair to report both expected vs. actual repair bytes and expected vs. actual keyspaces
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-20581
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-20581
>             Project: Apache Cassandra
>          Issue Type: Task
>          Components: Consistency/Repair
>            Reporter: Jaydeepkumar Chovatia
>            Assignee: Jaydeepkumar Chovatia
>            Priority: Normal
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> The current AutoRepair framework has enough visibility to know which nodes are going through repair, the duration they ran repair, the token ranges repaired, the failed ranges, and the successful/failed keyspaces/tables.
> However, on a node when repair is running, we miss a few fine-grained signals {*}while repair is in progress{*}, such as the following:
>  # Number of tables/keyspaces/token ranges repaired vs. pending
>  # Number of Merkle trees/token-ranges out of sync, which indirectly tells us inconsistencies among the nodes
>  ## Convert this metric into % of data in sync vs. not
>  
> Fine-grained node-level observability also came up while [reviewing|https://github.com/jaydeepkumar1984/cassandra/pull/54#issuecomment-2813945023] the POC for Repair on bootstrap, as it is a must for repairing as part of the bootstrap.
> This ticket is to improve the AutoRepair observability, and make it similar to _nodetool compactionstats_



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