Data Management in IoT

Description

This is a console based application for simulating Data Management in mobile nodes. Nodes can be added or removed from the network. Connections among different nodes can be specified following the instructions given below. Following protocols are used in this project.

Protocols

• Recording Updates: State-based model
• Sending Updates: Modified-Bit protocol
• Ordering Updates: Timestamps
• Conflict Management: Latest update wins

How to run?

The following instructions are an example of creating a network with 2 nodes. The file directory for the first node is node_data and the second node is node_data1. As we are running it on a single machine, we will have to specify and keep track of port numbers for processes of each node.
Two processes need to be run manually for each node: SyncServer and SyncClient. The first process keeps running until terminated manually by the user. The second process will be terminated automatically as soon as the sync is completed.

1. Create 2 directories in project folder (same folder as of src):
   • node_data
   • node_data1
2. Run FileCreator.java with the following command line arguments:
   • node_data 5
   • It will create 10 files in node_data (5 data files, 5 metadata files)
3. Run SyncServer.java with the following command line arguments:
   • node_data 5000 5001
   • It will start server with two threads on above ports
4. Run SyncClient.java with the following command line arguments:
   • localhost:6000;6001 node_data1 localhost 5000 5001
   • It will connect with server and send clientID localhost:6000;6001 *
5. All the files in node_data will be replicated in node_data1 (sync success)

* clientID follows the following pattern:

nodeHostName:fileServerPort;metaDataServerPort

In our case, nodeHostName will always be equal to localhost because we are running all nodes on the same machine but port numbers will vary.