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https://issues.apache.org/jira/browse/SOLR-6273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14968987#comment-14968987
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Renaud Delbru commented on SOLR-6273:
-------------------------------------
The tlog replication is only relevant to the source cluster, as it ensures that
tlogs are replicated between a master and slaves in case of a recovery (with a
snappull). If not, then there are some scenarios where a slave can end up with
an incomplete update log, and if it becomes the master, then we will miss some
updates and the target cluster becomes inconsistent wrt the source cluster.
> Cross Data Center Replication
> -----------------------------
>
> Key: SOLR-6273
> URL: https://issues.apache.org/jira/browse/SOLR-6273
> Project: Solr
> Issue Type: New Feature
> Reporter: Yonik Seeley
> Assignee: Erick Erickson
> Attachments: SOLR-6273-trunk-testfix1.patch,
> SOLR-6273-trunk-testfix2.patch, SOLR-6273-trunk-testfix3.patch,
> SOLR-6273-trunk.patch, SOLR-6273-trunk.patch, SOLR-6273.patch,
> SOLR-6273.patch, SOLR-6273.patch, SOLR-6273.patch
>
>
> This is the master issue for Cross Data Center Replication (CDCR)
> described at a high level here:
> http://heliosearch.org/solr-cross-data-center-replication/
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