Ming Ma created HDFS-8647:
-----------------------------
Summary: Abstract BlockManager's rack policy into
BlockPlacementPolicy
Key: HDFS-8647
URL: https://issues.apache.org/jira/browse/HDFS-8647
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Ming Ma
Sometimes we want to have namenode use alternative block placement policy such
as upgrade domains in HDFS-7541.
BlockManager has built-in assumption about rack policy in functions such as
useDelHint, blockHasEnoughRacks. That means when we have new block placement
policy, we need to modify BlockManager to account for the new policy. Ideally
BlockManager should ask BlockPlacementPolicy object instead. That will allow us
to provide new BlockPlacementPolicy without changing BlockManager.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
