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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-2098) [EC2] Build a HA cluster
Date Thu, 13 May 2010 22:15:46 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-2098.
-----------------------------------

    Resolution: Later

Closed per HBASE-2543.

> [EC2] Build a HA cluster
> ------------------------
>
>                 Key: HBASE-2098
>                 URL: https://issues.apache.org/jira/browse/HBASE-2098
>             Project: Hadoop HBase
>          Issue Type: Sub-task
>            Reporter: Andrew Purtell
>            Priority: Minor
>             Fix For: 0.22.0
>
>
> The Hadoop NameNode is a single point of failure. If the master instance fails, HDFS
is down; therefore, HBase as well. So we do not try to deploy HBase in a multimaster configuration
for that reason. Instead we colocate the HDFS NameNode and HBase HMaster on the same instance
and run with its failure as a known risk. As these EC2 scripts are starter scripts which can
(and should) be customized, this is ok, but we can do better. We should deploy a fully fault
tolerant Hadoop+HBase cluster as a worked example of how to do it. 

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