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Date: Tue, 26 Apr 2016 07:15:13 +0000 (UTC)
From: "xupeng (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12962494.1461653191000.32095.1461654913083@Atlassian.JIRA>
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Subject: [jira] [Commented] (HDFS-10328) Add cache pool level replication
 managment
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    [ https://issues.apache.org/jira/browse/HDFS-10328?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D1525=
7676#comment-15257676 ]=20

xupeng commented on HDFS-10328:
-------------------------------

Attach a patch.=20

User can set replication for pool by using "cacheadmin -addPool -replicatio=
n" or "cacheadmin -modifyPool -replication". When adding a cache directive =
into pool without setting replication num, the cache directive will inherit=
 replication configuration from cache pool.=20

Also you can override this setting by using =E2=80=9Ccacheadmin -addDirecti=
ve  -replication=E2=80=9D or "cacheadmin -modifyDirective -replication".=20


> Add cache pool level replication managment=20
> -------------------------------------------
>
>                 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: HADOOP-10328.001.patch
>
>
> For now, hdfs cacheadmin can not set a replication num for cachepool. Eac=
h cache directive added in the cache pool should set their own replication =
num individually.=20
> 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 i=
n the same cache pool. =20
> I think we should enable setting a replication num for cachepool that eve=
ry cache directive in the pool can inherit replication configuration from t=
he pool. Also cache directive can override replication configuration explic=
itly by calling "add & modify  directive -replication" command from cli.   =
=20


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