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Posted to dev@lucene.apache.org by "Varun Thacker (JIRA)" <ji...@apache.org> on 2014/10/08 19:31:33 UTC
[jira] [Updated] (SOLR-6606) In cloud mode the leader should
distribute autoCommits to it's replicas
[ https://issues.apache.org/jira/browse/SOLR-6606?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Varun Thacker updated SOLR-6606:
--------------------------------
Attachment: SOLR-6606.patch
Patch where the auto (hard) commit command is executed only on the leader and subsequently forwarded to it's replicas.
The current tests pass but I am unsure how many of them actually triggered this code path.
I wanted to get some feedback as to what everyone feels about this approach before writing additional tests
> In cloud mode the leader should distribute autoCommits to it's replicas
> -----------------------------------------------------------------------
>
> Key: SOLR-6606
> URL: https://issues.apache.org/jira/browse/SOLR-6606
> Project: Solr
> Issue Type: Improvement
> Reporter: Varun Thacker
> Fix For: 5.0, Trunk
>
> Attachments: SOLR-6606.patch
>
>
> Today in SolrCloud different replicas of a shard can trigger auto (hard) commits at different times. Although the documents which get added to the system remain consistent the way the segments gets formed can be different because of this.
> The downside of segments not getting formed in an identical fashion across replicas is that when a replica goes into recovery chances are that it has to do a full index replication from the leader. This is time consuming and we can possibly avoid this if the leader forwards auto (hard) commit commands to it's replicas and the replicas never explicitly trigger an auto (hard) commit.
> I am working on a patch. Should have it up shortly
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