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From "Mark Miller (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2808) Node Recovery
Date Fri, 02 Dec 2011 03:04:42 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13161388#comment-13161388
] 

Mark Miller commented on SOLR-2808:
-----------------------------------

To update what's done here:

I've taken what Yonik has done in SOLR-2700 and implemented basic replication recovery.

When a new replica comes up, or a node goes down and comes back, recovery is triggered. The
recovery process issues a commit to the leader, starts buffering updates to the transaction
log, and does a replication. Then it replays the buffered updates.

This gives us working recovery. Eventually, we will want to use realtime-get to do a faster
recovery when the node has not been down for long - that's really just an optimization though.


I'm still slaving away on getting good tests for this, but its up and working which is pretty
sweet.
                
> Node Recovery
> -------------
>
>                 Key: SOLR-2808
>                 URL: https://issues.apache.org/jira/browse/SOLR-2808
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud
>            Reporter: Yonik Seeley
>             Fix For: 4.0
>
>         Attachments: TEST-org.apache.solr.cloud.RecoveryZkTest.xml
>
>
> Node recovery encompasses everything involved in getting a node to the "active" state
after coming (back) up.

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