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https://issues.apache.org/jira/browse/HBASE-8844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13697376#comment-13697376
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Patrick commented on HBASE-8844:
--------------------------------
Am I correct in assuming that stop_replication will not harm the master
cluster, and will only have a negative effect on the backup cluster (leave it
in an undetermined state)? There's a big difference between data loss on the
master, and data loss in the standby :)
This may be from lack of familiarity with HBase, but it's not clear to me what
this means: "start/stop replication is only meant to be used in critical load
situations". Specifically, I don't know what a critical load situation is. Are
we talking about server load (as in load average)? If that's the case, is the
idea to stop replication until load goes down, then start it again?
> Document stop_replication danger
> --------------------------------
>
> Key: HBASE-8844
> URL: https://issues.apache.org/jira/browse/HBASE-8844
> Project: HBase
> Issue Type: Task
> Components: documentation
> Reporter: Patrick
> Priority: Minor
> Attachments: HBASE-8844.patch
>
>
> The first two tutorials for enabling replication that google gives me [1],
> [2] take very different tones with regard to stop_replication. The HBase docs
> [1] make it sound fine to start and stop replication as desired. The Cloudera
> docs [2] say it may cause data loss.
> Which is true? If data loss is possible, are we talking about data loss in
> the primary cluster, or data loss in the standby cluster (presumably would
> require reinitializing the sync with a new CopyTable).
> [1]
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/replication/package-summary.html#requirements
> [2]
> http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/4.2.0/CDH4-Installation-Guide/cdh4ig_topic_20_11.html
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