[jira] [Created] (HDFS-12093) [READ] Share remoteFS between ProvidedReplica instances.

["Ewan Higgs (JIRA)" <ji...@apache.org>]

Ewan Higgs created HDFS-12093:
---------------------------------

             Summary: [READ] Share remoteFS between ProvidedReplica instances.
                 Key: HDFS-12093
                 URL: https://issues.apache.org/jira/browse/HDFS-12093
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Ewan Higgs


Then a Datanode comes online using Provided storage, it fills the {{ReplicaMap}} with the known replicas. With Provided Storage, this includes {{ProvidedReplica}} instances. Each of these objects, in their constructor, will construct an FileSystem using the Service Provider. This can result in contacting the remote file system and checking that the credentials are correct and that the data is there. For large systems this is a prohibitively expensive operation to perform per replica.

Instead, the {{ProvidedVolumeImpl}} should own the reference to the {{remoteFS}} and should share it with the {{ProvidedReplica}} objects on their creation.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-dev-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-dev-help@hadoop.apache.org