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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11740) Ozone: Differentiate time interval for different DatanodeStateMachine state tasks
Date Wed, 03 May 2017 17:55:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Weiwei Yang updated HDFS-11740:
-------------------------------
    Attachment:     (was: HDFS-11725-HDFS-7240.001.patch)

> 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: 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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