[jira] [Commented] (SOLR-6463) track update progress

["Yonik Seeley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-6463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117550#comment-14117550 ] 

Yonik Seeley commented on SOLR-6463:
------------------------------------

Need to think about:
- which side should keep track?  The sender or receiver?
- persisting... what happens if we lose power... we want to keep track of what updates we haven't sent to our peer yet and continue on where we left off
- leader changes... if only the leader is keeping track of where it's peer leader is, what happens if the current leader goes away?


> track update progress
> ---------------------
>
>                 Key: SOLR-6463
>                 URL: https://issues.apache.org/jira/browse/SOLR-6463
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Yonik Seeley
>
> Update progress needs to be tracked so that catch-up can be done after a network outage between clusters.



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