[HDFS-5101] ZCR should work with blocks bigger than 2 GB

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: hdfs-client
• Assignee: Unassigned
• Reporter: Colin McCabe
• Created: 15/Aug/13 20:53
• Updated: 15/Aug/13 20:54

Description

Zero-copy reads should work with blocks bigger than 2 GB. This will a little tricky, because a single ByteBuffer can only span 2 GB in Java (due to the use of a signed 4-byte int for sizes, etc).

Issue Links

• is blocked by: HDFS-4953 enable HDFS local reads via mmap