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From "xupeng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10328) Add per-cache-pool default replication num configuration
Date Wed, 04 May 2016 16:26:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15270933#comment-15270933

xupeng commented on HDFS-10328:

Hi [~cmccabe]

Thanks for the review. 

I followed your advice,  changed CachePoolInfoProto definition. Please refer to the new patch
i submitted. 

> Add per-cache-pool default replication num configuration
> --------------------------------------------------------
>                 Key: HDFS-10328
>                 URL: https://issues.apache.org/jira/browse/HDFS-10328
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: caching
>            Reporter: xupeng
>            Assignee: xupeng
>            Priority: Minor
>             Fix For: 2.3.0
>         Attachments: HDFS-10328.001.patch, HDFS-10328.002.patch, HDFS-10328.003.patch
> For now, hdfs cacheadmin can not set a default replication num for cached directive in
the same cachepool. Each cache directive added in the same cache pool should set their own
replication num individually. 
> Consider this situation, we add daily hive table into cache pool "hive" .Each time i
should set the same replication num for every table directive in the same cache pool.  
> I think we should enable setting a default replication num for a cachepool that every
cache directive in the pool can inherit replication configuration from the pool. Also cache
directive can override replication configuration explicitly by calling "add & modify 
directive -replication" command from cli.    

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