[HBASE-5901] Use union type protobufs instead of class/byte pairs for multi requests

• Type: Improvement
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.95.2
• Fix Version/s: 0.95.0
• Component/s: IPC/RPC, Performance
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 30/Apr/12 06:53
• Updated: 23/Sep/13 18:31
• Resolved: 01/May/12 23:15

Description

The current implementation of multi actions uses repeated "NameBytesPair"s for the contents of multi actions. Instead, we should introduce a union type protobuf for the valid actions. This makes the RPCs smaller since they don't need to carry class names, and makes deserialization faster since it can avoid some copying and reflection.