[HDFS-8558] Remove the use of hard-coded cell size value in balancer Dispatcher

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Fix Version/s: HDFS-7285
• Assignee: Walter Su
• Reporter: Kai Zheng
• Created: 08/Jun/15 12:16
• Updated: 10/Oct/15 06:27
• Resolved: 10/Oct/15 06:27

Description

This is part of work in HDFS-8494. To make it easy and discuss this case better, open this issue to remove the use of hard-coded cell size value in balancer Dispatcher separately. Also copied some good comments here:

From walter.k.su:

It's easy to pass cellSize from BlockInfoStriped to Dispatcher. But the question is BlockInfoStriped doesn't have it.
You have to get it by: BlockInfoStriped --> getBlockCollection --> getZone --> getCellSize. A bit complicated, isn't it?
I think BlockInfoStriped needs to keep cellSize.

From vinayrpet:

I too was thinking the same when the FSImageLoader problem has came up. This will increase the memory usage by ~4bytes for each block though.

Issue Links

• duplicates: HDFS-8882 Erasure Coding: Use datablocks, parityblocks and cell size from ErasureCodingPolicy