[HDFS-6899] Allow changing MiniDFSCluster volumes per DN and capacity per volume

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 2.6.0
• Component/s: datanode, test
• Target Version/s: 2.6.0
• Hadoop Flags: Reviewed
• Assignee: Arpit Agarwal
• Reporter: Arpit Agarwal
• Created: 21/Aug/14 00:47
• Updated: 01/Dec/14 03:08
• Resolved: 23/Aug/14 06:02

Description

MiniDFSCluster hardcodes the number of directories per volume to two. Propose removing the hard-coded restriction.

It would be useful to limit the capacity of individual storage directories for testing purposes. There is already a way to do so for SimulatedFSDataset, we can add one when using real volumes.

Issue Links

• is required by: HDFS-6898 DN must reserve space for a full block when an RBW block is created