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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1160) Multi-site replication support
Date Wed, 28 Jan 2009 00:06:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667879#action_12667879

ryan rawson commented on HBASE-1160:

We'd probably want to avoid spanning a cluster across datacenter boundaries... it's too easy
to get into irreconcilable network splits.

Replication as a site-to-site backup is a great approach.  Multi-master replication would
allow concurrent read/write when the link between the sites is down, but the internet connection
is still available (very common scenario surprisingly).

I don't think we need a statistical 'eventual consistency' multi-write (Eg: paxos), but instead
a straight forward replication stream (a la redo log replication from Oracle, mysql, etc)
would be pretty good.  Tools to monitor that replication stream (replicas are X seconds behind
kind of thing) would also be necessary.

> Multi-site replication support
> ------------------------------
>                 Key: HBASE-1160
>                 URL: https://issues.apache.org/jira/browse/HBASE-1160
>             Project: Hadoop HBase
>          Issue Type: New Feature
>            Reporter: Jean-Daniel Cryans
> HBase should support multi-site replication in order to provide higher availability.
A first version with eventual consistency could be easy to implement.

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