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Posted to hdfs-dev@hadoop.apache.org by "Weiwei Yang (JIRA)" <ji...@apache.org> on 2017/06/01 01:46:04 UTC
[jira] [Resolved] (HDFS-11740) Ozone: Differentiate time interval
for different DatanodeStateMachine state tasks
[ https://issues.apache.org/jira/browse/HDFS-11740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Weiwei Yang resolved HDFS-11740.
--------------------------------
Resolution: Later
Will revisit this if necessary in feature.
> Ozone: Differentiate time interval for different DatanodeStateMachine state tasks
> ---------------------------------------------------------------------------------
>
> Key: HDFS-11740
> URL: https://issues.apache.org/jira/browse/HDFS-11740
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Attachments: HDFS-11740-HDFS-7240.001.patch, HDFS-11740-HDFS-7240.002.patch, HDFS-11740-HDFS-7240.003.patch, statemachine_1.png, statemachine_2.png
>
>
> Currently datanode state machine transitioned between tasks in a fixed time interval, defined by {{ScmConfigKeys#OZONE_SCM_HEARTBEAT_INTERVAL_SECONDS}}, the default value is 30s. Once datanode is started, it will need 90s before transited to {{Heartbeat}} state, such a long lag is not necessary. Propose to improve the logic of time interval handling, it seems only the heartbeat task needs to be scheduled in {{OZONE_SCM_HEARTBEAT_INTERVAL_SECONDS}} interval, rest should be done without any lagging.
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