[jira] [Commented] (HDFS-14894) Add balancer parameter to balance top used nodes

2020-04-11 Thread Hadoop QA (Jira) 


[ 
https://issues.apache.org/jira/browse/HDFS-14894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17081555#comment-17081555
 ] 

Hadoop QA commented on HDFS-14894:
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[jira] [Commented] (HDFS-14894) Add balancer parameter to balance top used nodes

2019-11-19 Thread Wei-Chiu Chuang (Jira) 


[ 
https://issues.apache.org/jira/browse/HDFS-14894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16977737#comment-16977737
 ] 

Wei-Chiu Chuang commented on HDFS-14894:


[~pifta] could you help review the PR?

> Add balancer parameter to balance top used nodes
> 
>
> Key: HDFS-14894
> URL: https://issues.apache.org/jira/browse/HDFS-14894
> Project: Hadoop HDFS
>  Issue Type: Improvement
>  Components: balancer & mover
>Reporter: Leon Gao
>Assignee: Leon Gao
>Priority: Major
> Attachments: HDFS-14894.001.patch
>
>
> We sometimes see a few of our datanodes reach very high usage (due to various 
> reasons) and we need to reduce their usage in an urgent situation.
> We see two ways to achieve it currently,
> -Calculate and reset balancing threshold.
> -Pick nodes manually according to usage stats and put them in a file and use 
> `-resource` flag.
> However, both of them are not very intuitive or too much manual work in an 
> urgent close-to-outage situation. Add a small feature to automatically pick 
> top used hosts will be a straightforward option, for example 
> `-sourceThreshold 95` to only target datanodes with >95% usage. 



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[jira] [Commented] (HDFS-14894) Add balancer parameter to balance top used nodes

2019-10-15 Thread Hadoop QA (Jira) 


[ 
https://issues.apache.org/jira/browse/HDFS-14894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952499#comment-16952499
 ] 

Hadoop QA commented on HDFS-14894:
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| (x) *{color:red}-1 overall{color}* |
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|   | hadoop.hdfs.TestReadStripedFileWithDNFailure |
|   | hadoop.hdfs.TestFileCorruption |
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|   | hadoop.hdfs.TestLeaseRecovery2 |
|   | hadoop.hdfs.TestParallelShortCircuitReadUnCached |
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|   | hadoop.hdfs.server.namenode.snapshot.TestRenameWithSnapshots |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.3 Server=19.03.3 Image:yetus/hadoop:104ccca9169 |
| JIRA Issue | HDFS-14894 |
| JIRA Patch URL | 
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[jira] [Commented] (HDFS-14894) Add balancer parameter to balance top used nodes

2019-10-11 Thread Leon Gao (Jira) 


[ 
https://issues.apache.org/jira/browse/HDFS-14894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949836#comment-16949836
 ] 

Leon Gao commented on HDFS-14894:
-

Hi [~kihwal] , Could you take a look at the PR and let me know any thoughts? 
Thanks!

> Add balancer parameter to balance top used nodes
> 
>
> Key: HDFS-14894
> URL: https://issues.apache.org/jira/browse/HDFS-14894
> Project: Hadoop HDFS
>  Issue Type: Improvement
>  Components: balancer & mover
>Reporter: Leon Gao
>Assignee: Leon Gao
>Priority: Major
>
> We sometimes see a few of our datanodes reach very high usage (due to various 
> reasons) and we need to reduce their usage in an urgent situation.
> We see two ways to achieve it currently,
> -Calculate and reset balancing threshold.
> -Pick nodes manually according to usage stats and put them in a file and use 
> `-resource` flag.
> However, both of them are not very intuitive or too much manual work in an 
> urgent close-to-outage situation. Add a small feature to automatically pick 
> top used hosts will be a straightforward option, for example 
> `-sourceThreshold 95` to only target datanodes with >95% usage. 



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[jira] [Commented] (HDFS-14894) Add balancer parameter to balance top used nodes

2019-10-09 Thread Leon Gao (Jira) 


[ 
https://issues.apache.org/jira/browse/HDFS-14894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16948214#comment-16948214
 ] 

Leon Gao commented on HDFS-14894:
-

[~kihwal] Good idea. This ticket is to put a convenient option to automatically 
select top used nodes as source (which we find useful during on-call).

I can open another Jira to see if we can schedule priority based on utilization.

> Add balancer parameter to balance top used nodes
> 
>
> Key: HDFS-14894
> URL: https://issues.apache.org/jira/browse/HDFS-14894
> Project: Hadoop HDFS
>  Issue Type: Improvement
>  Components: balancer & mover
>Reporter: Leon Gao
>Assignee: Leon Gao
>Priority: Major
>
> We sometimes see a few of our datanodes reach very high usage (due to various 
> reasons) and we need to reduce their usage in an urgent situation.
> We see two ways to achieve it currently,
> -Calculate and reset balancing threshold.
> -Pick nodes manually according to usage stats and put them in a file and use 
> `-resource` flag.
> However, both of them are not very intuitive or too much manual work in an 
> urgent close-to-outage situation. Add a small feature to automatically pick 
> top used hosts will be a straightforward option, for example 
> `-sourceThreshold 95` to only target datanodes with >95% usage. 



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