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Posted to dev@hbase.apache.org by "ryan rawson (JIRA)" <ji...@apache.org> on 2009/05/21 23:37:45 UTC

[jira] Commented: (HBASE-1445) Add the ability to start a master from any machine

    [ https://issues.apache.org/jira/browse/HBASE-1445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711825#action_12711825 ] 

ryan rawson commented on HBASE-1445:
------------------------------------

One other thing, if hbase.regionserver.dns.interface isnt set, we should use 'hostname' - there are standard Java APIs to determine this.  Look in the hadoop net code.  If dns.nameserver is not set, we should use the system-default as well.

For people who are satisified with 'hostname' as the accurate IP for their host, don't make them set extra config.

> Add the ability to start a master from any machine
> --------------------------------------------------
>
>                 Key: HBASE-1445
>                 URL: https://issues.apache.org/jira/browse/HBASE-1445
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Critical
>             Fix For: 0.20.0
>
>
> Currently when we start a master it reads the MASTER_HOST_NAME and MASTER_ADDRESS configurations. That means that when you want to start a master on another machine, you have to change hbase-site.xml
> One thing we could do is when you want a 1 ZK, 1 Master setup, you set that value and everything is taken care of (easier for newcomers). When you want multiple masters, you have to use a quorum and set the hbase.regionserver.dns.interface and hbase.regionserver.dns.nameserver configurations to bind on the right interface. Maybe those should have a different name tho.

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