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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2197) Start replication from a point in time
Date Wed, 10 Feb 2010 17:20:28 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832081#action_12832081
] 

Andrew Purtell commented on HBASE-2197:
---------------------------------------

My expectation as a user is that I would turn on replication and then do a MR job to transfer
already stored data from the source cluster to the new peer. So this is iterating over and
streaming values, not shipping files. In this way I would not miss any new edits because they
are already replicating even as I am bringing over the values persisted before replication
started, with timestamps preserved. But, I would also have my clocks NTP synchronized and
I would not be manually adjusting timestamps. 

> Start replication from a point in time
> --------------------------------------
>
>                 Key: HBASE-2197
>                 URL: https://issues.apache.org/jira/browse/HBASE-2197
>             Project: Hadoop HBase
>          Issue Type: Sub-task
>            Reporter: Jean-Daniel Cryans
>             Fix For: 0.21.0
>
>
> One way to set up a cluster for replication is to distcp all files then start the replication.
We need a way to make sure we don't miss any edits by being able to start a process that reads
old log files from a defined point in time and send them to a specific slave cluster and then
catch up with normal replication.

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