[HDFS-5521] skip checksums when reading a cached block via non-local reads

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 3.0.0-alpha1
• Component/s: datanode
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 15/Nov/13 22:00
• Updated: 12/May/16 18:12
• Resolved: 05/Dec/13 21:00

Description

The DataNode needs to skip checksumming when reading a cached block via non-local reads. This is like HDFS-5182, but for non-short-circuit.

Issue Links

• is related to: HDFS-5182 BlockReaderLocal must allow zero-copy reads only when the DN believes it's valid