[jira] [Commented] (HBASE-15695) Ambari support for bucket caching parameter - hbase.bucketcache.ioengine

["Jonathan Hsieh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-15695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254307#comment-15254307 ] 

Jonathan Hsieh commented on HBASE-15695:
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Hi [~nitinverma], this sounds like an ambari ticket instead of an hbase one.  Was this accidentally posted to the wrong project?

> Ambari support for bucket caching parameter - hbase.bucketcache.ioengine
> ------------------------------------------------------------------------
>
>                 Key: HBASE-15695
>                 URL: https://issues.apache.org/jira/browse/HBASE-15695
>             Project: HBase
>          Issue Type: New Feature
>          Components: BucketCache
>            Reporter: Nitin Verma
>            Assignee: Nitin Verma
>
> In order to utilize SSD as a L2 (bucket) cache, we specify a file location to hbase.bucketcache.ioengine parameter. 
> hbase.bucketcache.ioengine=file:<filepath>
> The directory location specified to the above parameter could be non-existent or non-accessible. 
> Since ambari-agent runs with root permissions, the proposed change here is to read the 'hbase.bucketcache.ioengine' parameter from hbase configuration and see if it points to a file location (by looking at file: prefix). 
> In case ioengine points to a file, ambari-agent should create the underlying directory and assign appropriate permissions to hbase:hadoop user. 



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