[TAJO-333] Add metric system to Tajo

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Labels: metrics
• Assignee: Hyoungjun Kim
• Reporter: Hyunsik Choi
• Created: 26/Nov/13 16:34
• Updated: 15/Dec/13 16:02
• Resolved: 14/Dec/13 03:34

Description

Currently, there is no way to measure and observe Tajo's internal operations. As a Hadoop job, Tajo also should measure and record a lot of operational works.

I would like to propose the use of Metrics (http://metrics.codahale.com/). It is well known as a stable and efficient metric library.