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https://issues.apache.org/jira/browse/HBASE-2870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12896932#action_12896932
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HBase Review Board commented on HBASE-2870:
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Message from: "Nicolas" <[email protected]>
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This is an automatically generated e-mail. To reply, visit:
http://review.cloudera.org/r/592/
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(Updated 2010-08-10 09:28:45.319671)
Review request for hbase.
Changes
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updated patch per stack's request
Summary
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Adds '--backup' option to HMaster. All backup masters will wait until a
primary master has written the /hbase/master znode before poll waiting. This
allows us to have a deterministic primary master while starting up multiple
masters. Note that you can specify a list of backup masters to automatically
start/stop via the 'conf/backup-masters' file.
This addresses bug HBASE-2870.
http://issues.apache.org/jira/browse/HBASE-2870
Diffs (updated)
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trunk/bin/hbase-config.sh 983869
trunk/bin/hbase-daemons.sh 983869
trunk/bin/local-master-backup.sh 983869
trunk/bin/master-backup.sh PRE-CREATION
trunk/bin/start-hbase.sh 983869
trunk/bin/stop-hbase.sh 983869
trunk/src/main/java/org/apache/hadoop/hbase/HConstants.java 983869
trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java 983869
trunk/src/main/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWrapper.java
983869
Diff: http://review.cloudera.org/r/592/diff
Testing
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Thanks,
Nicolas
> Add Backup CLI Option to HMaster
> --------------------------------
>
> Key: HBASE-2870
> URL: https://issues.apache.org/jira/browse/HBASE-2870
> Project: HBase
> Issue Type: New Feature
> Reporter: Nicolas Spiegelberg
> Assignee: Karthik Ranganathan
> Priority: Minor
> Fix For: 0.90.0
>
>
> The HMaster main() should allow a toggle like --backup, which forces it to be
> a secondary master on startup versus a primary candidate. That way, we can
> start up multiple masters at once and deterministically know which one will
> be the original primary.
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