[HADOOP-11226] Add a configuration to set ipc.Client's traffic class with IPTOS_LOWDELAY|IPTOS_RELIABILITY

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: ipc
• Labels: Infiniband
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Release Note: Use low latency TCP connections for hadoop IPC
• Assignee: Gopal Vijayaraghavan
• Reporter: Gopal Vijayaraghavan
• Created: 24/Oct/14 08:08
• Updated: 30/Aug/16 01:31
• Resolved: 10/Mar/15 04:18

Description

During heavy shuffle, packet loss for IPC packets was observed from a machine.

Avoid packet-loss and speed up transfer by using 0x14 QOS bits for the packets.