16:00 on Friday 8th March 2019
Use RMI in Java/Python to implement a reliable distributed replication system based on the gossip replication architecture, to retrieve, update and submit movie ratings.
-
Draw a simple diagram to depict the system you have implemented. It should clearly illustrate major operation workflow flows between servers, a client and the front-end.
-
Construct replication servers to maintain movie rating information. At least 3 servers should be implemented. Simulate server availability and failure situations by having them arbitrarily report themselves as "active", "over-loaded" or "offline".
-
Construct a front-end server. It serves as the entry point for a client to access the distributed system. It should react to server availability.
-
Construct a client program. It provides an interface for the user to retrieve, submit and update movie ratings. This is just a text-based UI.
-
Apply a suitable consistency control mechanism to support the gossip replication architecture. Include a suitable data message design to support such a mechanism.
| Section | Marks |
|---|---|
| Diagram | 10 |
| Replication servers | 30 |
| Front-end server | 25 |
| Client program | 15 |
| Consistency control | 20 |
Single zip file containing all source code and diagram, including a readme with instructions for running your program and a 200 word description to highlight the main application features you have provided.