collab

An Incentive Based Self Stabilizing P2P File Storage System. Developed by a team from IIT Kharagpur as a term project for the subject 'Distributed Systems' during the Spring 2016 session

Developers

Suman Mondal
Sourav Bhattacharjee
Midhun George
Sumitro Bhaumik

Features

Nodes join together in the shape of a ring
The ring can tolerate upto 1 fault
Can upload and download files from each other
Incentive and penalty based on upload to download ratio
Any node can be leader
Redundant links in both forward and backward directions
An implementation of cached queries so that repeat queries are processed faster
Has an administrative menu which has lots of features to see the workings of the system like
- See list of files which are hosted by itself
- See list of files which are downloaded by itself
- See finger table
- See cache

Changelog

Added a hash function which takes a string and a key space as input and returns a number. Key space is defined in the config file
Made the application as a single file
Added a configuration file named config.py which consists of getter functions of different constants which are used by the various components of the system
Daemonized the listener thread
All downloads will take place in the current directory of the application while the uploads are saved in the collab directory
Integration of hash function
Made a dictionary of files stored in the current node
Upload and download amounts now currently reflect what actually happens
Made the sleep function simpler
Added more comments to the constructor and the import section
Downloads now take place in separate folders
Updated README files with individual responsibilities
Added a shell script which will delete all folders created due to the system
Huge update from Suman. I made some purely cosmetic changes to Suman's code

How to start the Collab system

Run the following command for each node
python collab.py for the first node
python collab.py IP_ADDRESS where IP_ADDRESS can be the IP of node which has already joined the system

Note

The application takes the IP address according to a bash script called inside the a python script. Currently, it's set to take the IP address of the interface named eth0. In a later update, it will be configurable by editing the config file

thexavier666 / collab