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From "Lokesh Jain (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12521) Ozone: SCM should read all Container info into memory when booting up
Date Tue, 24 Oct 2017 09:32:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16216606#comment-16216606
] 

Lokesh Jain commented on HDFS-12521:
------------------------------------

This is a sample json output. There is no extra information except for the owner and stateEnterTime
for end user in the containerInfo.

{
  "state" : "OPEN",
  "pipeline" : {
    "containerName" : "ContainerForTesting00",
    "lifeCycleState" : "OPEN",
    "type" : "STAND_ALONE",
    "factor" : "ONE",
    "pipelineName" : null
  },
  "stateEnterTime" : 334864604,
  "owner" : "OZONE",
  "containerName" : "ContainerForTesting00"
}
{
  "state" : "OPEN",
  "pipeline" : {
    "containerName" : "ContainerForTesting01",
    "lifeCycleState" : "OPEN",
    "type" : "STAND_ALONE",
    "factor" : "ONE",
    "pipelineName" : null
  },
  "stateEnterTime" : 334864624,
  "owner" : "OZONE",
  "containerName" : "ContainerForTesting01"
}

I have tested the hdfs oz and corona commands and they are working fine. I have tested put
and get key for hdfs oz and ran a corona job  I do not see an end user in this case. Maybe
I am missing something. Can you please point me to it?

> Ozone: SCM should read all Container info into memory when booting up
> ---------------------------------------------------------------------
>
>                 Key: HDFS-12521
>                 URL: https://issues.apache.org/jira/browse/HDFS-12521
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>            Reporter: Anu Engineer
>            Assignee: Lokesh Jain
>              Labels: ozoneMerge
>         Attachments: HDFS-12521-HDFS-7240.001.patch, HDFS-12521-HDFS-7240.002.patch,
HDFS-12521-HDFS-7240.003.patch, HDFS-12521-HDFS-7240.004.patch, HDFS-12521-HDFS-7240.005.patch
>
>
> When SCM boots up it should read all containers into memory. This is a performance optimization
that allows delays on SCM side. This JIRA tracks that issue.



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