[HDFS-7035] Make adding a new data directory to the DataNode an atomic operation and improve error handling

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 2.7.0, 2.6.1, 3.0.0-alpha1
• Component/s: datanode
• Labels: 2.6.1-candidate
• Target Version/s: 2.6.0
• Assignee: Lei (Eddy) Xu
• Reporter: Lei (Eddy) Xu
• Created: 09/Sep/14 20:40
• Updated: 02/Feb/17 14:07
• Resolved: 31/Oct/14 00:34

Description

It refactors DataStorage and BlockPoolSliceStorage to reduce the duplicate code and supports atomic adding volume operations. Also it parallels loading data volume operation: each thread loads one volume.

Issue Links

• breaks: HDFS-9372 Remove dead code in DataStorage.recoverTransitionRead