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https://issues.apache.org/jira/browse/HBASE-1511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12888999#action_12888999
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Nicolas Spiegelberg commented on HBASE-1511:
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psuedo-distributed ZK is more work than the others based upon the way that
ZooKeeperWrapper & HQuorumPeer was written. Should still be doable, but noting
some of the problems for consideration:
1. Need to add conf item (hbase.zookeeper.myid) to override ID lookup in
HQuorumPeer.writeMyID()
2. should be different per HQuorumPeer: hbase.zookeeper.property.clientPort +
hbase.zookeeper.property.dataDir
3. hbase.zookeeper.property.server.<id> will be changed to
<addr>:<peer_port>:<leader_port>:<client_port>
a. We currently don't allow a custom peer_port + leader_port even though ZK
supports it
b. Need extra client_port for ZooKeeperWrapper.setQuorumServers()
I have a feeling I'm going to be writing this code twice after Jonathan
finishes the master rewrite.
> 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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