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Posted to hdfs-issues@hadoop.apache.org by "liaowenrui (Created) (JIRA)" <ji...@apache.org> on 2012/04/02 08:30:34 UTC
[jira] [Created] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
When the disk space is available back,Namenode resource monitor can automatically take off safemode.
----------------------------------------------------------------------------------------------------
Key: HDFS-3175
URL: https://issues.apache.org/jira/browse/HDFS-3175
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.24.0, 2.0.0
Reporter: liaowenrui
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[jira] [Commented] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13245066#comment-13245066 ]
liaowenrui commented on HDFS-3175:
----------------------------------
thank you very much
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
> Attachments: HDFS-3175.patch, HDFS-3175.patch
>
>
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[jira] [Commented] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244238#comment-13244238 ]
liaowenrui commented on HDFS-3175:
----------------------------------
Thank you very much for your comments.
why do it was a deliberate choice not to automatically exit SM if disk space late became available?
The NameNodeResourceChecker only check whether the disk is available or not, whether the system is automatically exit safemode or not is determined by NameNodeResourceMonitor.
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
>
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[jira] [Commented] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "Aaron T. Myers (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244007#comment-13244007 ]
Aaron T. Myers commented on HDFS-3175:
--------------------------------------
FWIW, when the NameNodeResourceChecker was originally implemented it was a deliberate choice not to automatically exit SM if disk space late became available. Obviously we could change that now if we wanted, but I just figured I'd point it out.
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
>
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[jira] [Updated] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
liaowenrui updated HDFS-3175:
-----------------------------
Attachment: HDFS-3175.patch
HDFS-3175.patch
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
> Attachments: HDFS-3175.patch, HDFS-3175.patch
>
>
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[jira] [Updated] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
liaowenrui updated HDFS-3175:
-----------------------------
Attachment: testcase
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
> Attachments: HDFS-3175.patch, HDFS-3175.patch, testcase
>
>
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[jira] [Commented] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "Aaron T. Myers (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244326#comment-13244326 ]
Aaron T. Myers commented on HDFS-3175:
--------------------------------------
Take a look at the end of [this comment|https://issues.apache.org/jira/browse/HDFS-1594?focusedCommentId=13020373&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13020373], in which Eli articulates the reasoning why not to automatically leave safe mode upon having enough disk space.
bq. The NameNodeResourceChecker only check whether the disk is available or not, whether the system is automatically exit safemode or not is determined by NameNodeResourceMonitor.
You're right. My mistake.
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
>
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[jira] [Commented] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246164#comment-13246164 ]
liaowenrui commented on HDFS-3175:
----------------------------------
Hi Aaron, I have seen your opinion in other issue HDFS-2914
https://issues.apache.org/jira/browse/HDFS-2914?focusedCommentId=13203135&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13203135
This can solve that issue as well.
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
> Attachments: HDFS-3175.patch, HDFS-3175.patch, HDFS-3175.patch, testcase
>
>
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[jira] [Updated] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
liaowenrui updated HDFS-3175:
-----------------------------
Attachment: HDFS-3175.patch
modify format
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
> Attachments: HDFS-3175.patch, HDFS-3175.patch, HDFS-3175.patch, testcase
>
>
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[jira] [Commented] (HDFS-3175) When the disk space is available
back,Namenode resource monitor can automatically take off safemode.
Posted by "liaowenrui (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246150#comment-13246150 ]
liaowenrui commented on HDFS-3175:
----------------------------------
hi Aaron,
I think that automatically leave safemode mechanism is better than manual.and It should be optimized to automatical approach.
Is it right?
> When the disk space is available back,Namenode resource monitor can automatically take off safemode.
> ----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3175
> URL: https://issues.apache.org/jira/browse/HDFS-3175
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.24.0, 2.0.0
> Reporter: liaowenrui
> Attachments: HDFS-3175.patch, HDFS-3175.patch, HDFS-3175.patch, testcase
>
>
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