[jira] [Commented] (SOLR-6462) forward updates asynchronously to peer clusters/leaders

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

    [ https://issues.apache.org/jira/browse/SOLR-6462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117535#comment-14117535 ] 

Yonik Seeley commented on SOLR-6462:
------------------------------------

Although we eventually want synchronous operation (on a per-update basis), let's start with async.
The code on the receiving side (the peer leader) should be pretty simple... I think almost all the necessary code should already be in there since it's the same type of operation needed during shard splitting (a leader accepting already versioned updates).

> forward updates asynchronously to peer clusters/leaders
> -------------------------------------------------------
>
>                 Key: SOLR-6462
>                 URL: https://issues.apache.org/jira/browse/SOLR-6462
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Yonik Seeley
>
> http://heliosearch.org/solr-cross-data-center-replication/#UpdateFlow
> - An update will be received by the shard leader and versioned
> - Update will be sent from the leader to it’s replicas
> - Concurrently, update will be sent (synchronously or asynchronously) to the shard leader in other clusters
> - Shard leader in the other cluster will receive already versioned update (and not re-version it), and forward the update to it’s replicas



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