Nitin Verma created HBASE-15695:
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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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