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From "Nitin Verma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-16056) Ambari support for bucket caching parameter - hbase.bucketcache.ioengine
Date Fri, 22 Apr 2016 18:02:12 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-16056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nitin Verma updated AMBARI-16056:
---------------------------------
    Attachment: ambari_bucket_cache (1).diff

The attached diff file contains necessary changes to validate and create ioengine file location.

> Ambari support for bucket caching parameter - hbase.bucketcache.ioengine
> ------------------------------------------------------------------------
>
>                 Key: AMBARI-16056
>                 URL: https://issues.apache.org/jira/browse/AMBARI-16056
>             Project: Ambari
>          Issue Type: New Feature
>          Components: ambari-agent
>            Reporter: Nitin Verma
>              Labels: newbie, patch
>         Attachments: ambari_bucket_cache (1).diff
>
>
> 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.
> Activity



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