Analyze vFolder Code in manager, agent

[HyeockJinKim]

Motivation  

Understand how the code is currently written in order to refactor the code around vfolders

Objective  

• Understand the concept of vfolder and how vfolder objects are being used in http://backend.ai especially in manger and agent
• Find improvements to vfolder-related code

Details  

• Find the parts of the manager and agent code that are using vFolders
• Understand the behavior of that part
• Look for points where cod can be improved structurally without touching the behavior

Impact  

• vfolder code will be more testable
• vfolder will be code more modifiable
• vfolder will be code more readable