fdRPC Middleware

fdRPC

This is supposed to be a simple RPC middleware written in GoLang for my "Distributed Systems" class.

Middleware

The middleware will (maybe) respect design patterns and implement infrastructure, distribution and common services layers. There will be a client request handler, server request handler, requestor and marshaller. This is the "application neutral" part, where the middleware will not change acoording to the application/remote object. Then there is the client proxy and invoker, that relates directly to the application, wether its the client or remote object.

Application

The application will be a simple "weather" app. Previously, I made a weather application using OpenWeatherMap, implemented in GoLang's RPC. But performing an application performance evaluation was very difficult since the time measurament depended on the request and reply from openweathermaps' service. Since the class goal is to develop a middleware and compare its performance to existing ones, the application should depend only on the middleware, for simplicity's sake. So, in this scenario, there will be no real weather. The application will generate a fake struct containing some weather data and send to the client. This will be done so that the implementation can be done locally, and performance evaluation can evaluate only the middleware performance.

Code Structure

1. Middleware

   1. Infrastructure

      1. Client Request Handler (application neutral)

      2. Server Request Handler (application neutral)

   2. Distribution

      1. Client Proxy

      2. Requestor (application neutral)

      3. Marshaller (application neutral)

      4. Invoker

   3. Common Services

      1. Naming Service

2. Application

   1. Weather

      1. Server

      2. Client

General todo List

DONE Code

DONE Client Request Handler DONE Server Request Handler DONE Requestor DONE Marshaler DONE Weather Implementation DONE Invoker (AS) DONE Client Proxy (AS) DONE Naming Service DONE NamingProxy DONE Application Server fdRPC DONE Application Server GoLang RPC DONE Application Client fdRPC DONE Application Client GoLang RPC

DONE Performance Evaluation

DONE Presentation

Performance Evaluation

fdRPC

200 requests

187,366707ms

300 requests

15.228220265s -> 50ms delay/request 228,22026ms

500 requests

25.377409998s -> 50ms delay/request 377,40999ms

700 requests

35.535756s -> 50ms delay/request 535,75ms

1000 requests

50.765702959s -> 50ms delay/request 765,70295ms

GoRPC

200 requests

208.558417ms

300 requests

267.293393ms

500 requests

378.7313ms

700 requests

591.099404ms

1000 requests

706.734381ms