Distributed Hash Table (DHT)

Explnation:

- This is a Distributed key-value (DHT) store project based on the Chord protocol. 
- This system supports Restful architecture as communication betwwen nodes. This means that the nodes are connected to each other by calling the API and exchange json data foramt. 
- Each node needs a address and port number to run.
- This system uses the MD5 hashing algorithm as the main hashing algorithm as well in Consistent Hashing.
- The current version support dynamic joining and leaving mechanism alongside the simulation crash feature.

Requirements:

System Requirement:
    - python3 (as a programming language)

Steps to setup the project environment:

• 1. configurations.py (the configs file to handle the system bahaviors)
     First of all we should set the maximum number (DHT_SIZE) of node that able to be in the network
     DHT_SIZE is the number obtained by (2 ^ M_BITS)
     It means that if MBITS = 4, then the maximum number of nodes that can be in the network is 16
     The other important variable in config file is INTERVAL Which indicates that the nodes check the stability of the network every few seconds

  -2. Establish Network
  Run a standalone node: python3 storageNode.py -p 3000
  For running a standalone node you can use this. It run a standalone node without connecting to any node

  and then we can call other nodes to join the network. Like this:
  python3 storageNode.py -p 3001 localhost:3000
  python3 storageNode.py -p 3002 localhost:3001
  python3 storageNode.py -p 3003 localhost:3000

  or by call the joining API (/join?nprime=localhost:3000)

• 1. python3 test.py : is a test python code which run N standalone nodes (based on DHT_SIZE in configuration.py), and after some seconds, join all that into one network. It is easy way to establish our network alongside testing joining and leaving stability