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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2129) Simple Master/Slave replication
Date Fri, 15 Jan 2010 18:48:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12800829#action_12800829

Andrew Purtell commented on HBASE-2129:

bq. In the case of master/master, you have to manage to not replicate edits from which you
are the origin (I know you know that). I guess you could encode that information in KV (routing

I was thinking to try overloading HLogKey with source routing information. So the replicator
can skip sending the edit to a replication peer if it is listed in the source path for the
item. Implies globally unique identifiers for peer clusters but that's not a big deal. Having
an admin assign one can be part of the replication config process. Could be just a byte, treated
as unsigned. I do not expect there will be deployments with > 256 peer HBase clusters for
a while. (Imagine that...)

bq. WRT scoping, I left it out of this particular Jira but it is one of the next item on my
todo list

Ok, cool.

bq.  along with live configuration of replication streams and being able to ask a cluster
to replicate edits from time X 


> Simple Master/Slave replication
> -------------------------------
>                 Key: HBASE-2129
>                 URL: https://issues.apache.org/jira/browse/HBASE-2129
>             Project: Hadoop HBase
>          Issue Type: Sub-task
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.21.0
>         Attachments: HBASE-2129.patch
> We should first build a very simple replication mechanism to validate our assumptions
and get a feel of what replication is in this very distributed context. 

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