[jira] [Commented] (HBASE-8104) HBase consistency and availability after replication

["Lars Hofhansl (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-8104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13602365#comment-13602365 ] 

Lars Hofhansl commented on HBASE-8104:
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Can you setup the two clusters in Master-Master replication? That way all changes made the "slave" cluster during the failover are scheduled to be replicated back to the "main" cluster once that becomes available.
                
> HBase consistency and availability after replication
> ----------------------------------------------------
>
>                 Key: HBASE-8104
>                 URL: https://issues.apache.org/jira/browse/HBASE-8104
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.94.3
>            Reporter: Brian Fu
>            Priority: Critical
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> HBase consistency and availability after replication
> Scene as follows:
> 1. There are two HBase clusters are the Master  clusters and Slave Clusters.  two clusters replication function is open.
> 2. if master cluster have problems, so  all write and read request switching to the slave cluster.
> 3. After a period of time ,we need to switch back to the Master cluster, there will be a part of the data is inconsistent, lead to  this part of the data is not available.
> This feature is particularly important for providing online services HBase cluster.
> So, I want through a write-back program to keep the data consistency, then to improve HBase availability. 
> we will provide a patch for this function.

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