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From "Nitin Verma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15695) Ambari support for bucket caching parameter - hbase.bucketcache.ioengine
Date Fri, 22 Apr 2016 17:19:13 GMT
Nitin Verma created HBASE-15695:
-----------------------------------

             Summary: 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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