SimpleRaft

This is a cloud-based file storage system which supports file creation, modification and deletion in a distributed manner.

Functionality

Client

Multiple clients can concurrently connect to the server to access a common set of files. Clients will see consistent file states among updates.

Server

Servers communicate with each other through RPC. In order to make different servers in the system have a consistent state, we implement leader election and log replication based on Raft.
Info related to files on the server are composed of two parts:

1. file data: the content of each file is divided up into chunks, or blocks, each of which has a unique identifier. Server stores blocks, and when given an identifier, retrieves and returns the appropriate block.
2. metadata: each server holds the mapping of filenames to blocks.

The whole system is tested with the python framework unittest.

How to Run

run client with

python clinet.py <host:port> <base_dir> <block size>

run server with

python server.py <config_file path> <server_num>

Co-Author

Xu wei

Reference

The Raft paper
The Raft simulator