[TAJO-269] Protocol buffer De/Serialization for LogicalNode

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Component/s: QueryMaster, Worker
• Assignee: Hyunsik Choi
• Reporter: Jihoon Son
• Created: 20/Oct/13 08:00
• Updated: 30/Dec/14 13:13
• Resolved: 30/Dec/14 12:55

Description

In the current implementation, the logical plan is serialized into a JSON object and sent to each worker.
However, the transmission of JSON object incurs the high overhead due to its large size.
ProtocolBuffer is a good alternative because its overhead is quite small and already used in other modules of Tajo.