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From "HBase Review Board (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1511) Pseudo distributed mode in LocalHBaseCluster
Date Fri, 16 Jul 2010 20:46:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889316#action_12889316
] 

HBase Review Board commented on HBASE-1511:
-------------------------------------------

Message from: stack@duboce.net

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This is an automatically generated e-mail. To reply, visit:
http://review.hbase.org/r/328/#review414
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Ship it!


This looks nice Nicolas.  Want to take care of the few below and I'll then commit?


trunk/bin/local-master-backup.sh
<http://review.hbase.org/r/328/#comment1761>

    Why is it called local-master-backup?  Should be a more descriptive name?  Its the 'backup'
that throws me off.  'local-masters'?
    



trunk/bin/local-master-backup.sh
<http://review.hbase.org/r/328/#comment1762>

    Explain 'offset' in this usage output?  (Seems to be port offset from default?)



trunk/bin/local-master-backup.sh
<http://review.hbase.org/r/328/#comment1763>

    Isn't the master default port 60000, not 60020?  60020 is RS default port?



trunk/conf/hbase-site.xml.psuedo-distributed
<http://review.hbase.org/r/328/#comment1767>

    This is commented out because dfs.support.append doesn't work with local fs?



trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
<http://review.hbase.org/r/328/#comment1768>

    You are adding a tab here?  Or white-space?



trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
<http://review.hbase.org/r/328/#comment1769>

    Add more comment in here... in particular on the '-splitting' suffix.  Where's that come
from?



trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
<http://review.hbase.org/r/328/#comment1770>

    Tab?



trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
<http://review.hbase.org/r/328/#comment1772>

    There is whitespace in here.



trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
<http://review.hbase.org/r/328/#comment1773>

    Sorry Nicolas... this looks like an old unused option.  Should probably remove it.



trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
<http://review.hbase.org/r/328/#comment1774>

    This is a nice addition.



trunk/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
<http://review.hbase.org/r/328/#comment1775>

    White space


- stack





> Pseudo distributed mode in LocalHBaseCluster
> --------------------------------------------
>
>                 Key: HBASE-1511
>                 URL: https://issues.apache.org/jira/browse/HBASE-1511
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.19.3
>            Reporter: Evgeny Ryabitskiy
>            Assignee: Nicolas Spiegelberg
>            Priority: Minor
>             Fix For: 0.92.0
>
>
> After changes to config and adding of parameter:
> {code}
>   <property>
>     <name>hbase.cluster.distributed</name>
>     <value>false</value>
>     <description>The mode the cluster will be in. Possible values are
>       false: standalone and pseudo-distributed setups with managed Zookeeper
>       true: fully-distributed with unmanaged Zookeeper Quorum (see hbase-env.sh)
>     </description>
>   </property>
> {code}
> running HBase in pseudo destr mode become not so easy, I think description for false
variant is wrong and you can't get pseudo-distributed mode setting this option to false now.
> I wish to have some option in LocalHBaseCluster for pseudo destr mode where I wish to
have:
>  * separate processes for Master and HRSs
>  * ability to dynamically change HRS number in cluster
>  * managed ZK cluster (like it is in local mode now)
>  * managed small local HDFS cluster
> I think it is very useful for testing, debugging and for user experience with HBase,
who want to try something close to real HBase not some emulation in standalone mode.

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