[
https://issues.apache.org/jira/browse/TAJO-275?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Keuntae Park updated TAJO-275:
------------------------------
Attachment: TAJO-275.patch
I've uploaded the patch for the issue.
CHANGES:
- Worker mode added in configuration
tajo.worker.mode.querymaster (default: true)
tajo.worker.mode.taskrunner (default: true)
- Following shell command is added
(in bin/start-tajo.sh)
"$bin/tajo-daemons.sh" --host querymasters cd "$TAJO_HOME" \;
"$bin/tajo-daemon.sh" start querymaster
(in bin/stop-tajo.sh)
"$bin/tajo-daemons.sh" --host querymasters cd "$TAJO_HOME" \;
"$bin/tajo-daemon.sh" stop querymaster
- If not specified in configuration, worker works as before,
i.e., one worker has both querymaster and taskrunner roles.
- How to have querymaster and taskrunner as separate daemons:
1) add following in conf/tajo-site.xml
tajo.worker.mode.querymaster=false
2) add list of querymaster servers in conf/querymaster
3) execute bin/tajo-start.sh
- How to start/stop querymaster in a given server
bin/tajo-daemon.sh start querymaster
bin/tajo-daemon.sh stop querymaster
> Separating QueryMaster and TaskRunner roles in worker
> -----------------------------------------------------
>
> Key: TAJO-275
> URL: https://issues.apache.org/jira/browse/TAJO-275
> Project: Tajo
> Issue Type: Improvement
> Reporter: Keuntae Park
> Assignee: Keuntae Park
> Attachments: TAJO-275.patch
>
>
> In C++ implementation of Tajo worker,
> I think it is better to maintain Java code of QueryMaster and implement only
> TaskRunner as C++ code, rather than implementing both QueryMaster and
> TaskRunner as C++ code.
> Accordingly, standby mode worker will have following 3 modes:
> 1) TaskRunner + QueryMaster (current implementation)
> 2) TaskRunner only (C++)
> 3) QueryMaster only (java)
> As a result, most workers work as C++ TaskRunner, and 1 or 2 workers work as
> separate QueryMasters (java process).
> For backward compatibility, default mode should be mode 1 (TaskRunner +
> QueryMaster)
--
This message was sent by Atlassian JIRA
(v6.1#6144)
