Here’s a concise and technical README.md for your Consistency Algorithms in Replicated Database Systems repository, complete with badges and clear instructions:

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Consistency Algorithms in Replicated Database Systems

Implementation of Strict, Causal, Sequential, PRAM, and Independent consistency models for replicated databases in Java.

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🚀 Overview

This project demonstrates five consistency algorithms for replicated database systems:

1. Strict Consistency
2. Causal Consistency
3. Sequential Consistency
4. PRAM (Pipelined RAM) Consistency
5. Independent Consistency

Built using Java RMI and MySQL, it simulates multi-client interactions with replicated servers to validate each model’s behavior under concurrent operations.

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⚙️ Prerequisites

• Java 8+
• MySQL Server
• mysql-connector-java-8.0.19.jar (included in src/)

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🛠️ How to Run

1. Update CLASSPATH

Ensure the MySQL connector JAR and current directory are in your CLASSPATH:

export CLASSPATH=.:./mysql-connector-java-8.0.19.jar  

2. Open Five Terminals

Terminal 1: Start RMI Registry

rmiregistry -J-Djava.rmi.useLocalHostName=true -J-Djava.rmi.server.hostname=127.0.0.1  

Terminals 2 & 3: Launch Database Servers

cd src/  
java Server   # Primary server  
java Server2  # Replica server  

Terminals 4 & 5: Start Clients

cd src/  
java Client   # Client 1  
java Client2  # Client 2  

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📂 Repository Structure

src/  
├── Server.java          # Primary server (implements RMI)  
├── Server2.java         # Replica server  
├── Client.java          # Client 1 logic  
├── Client2.java         # Client 2 logic  
├── ConsistencyModel.java # Interface for all algorithms  
├── StrictConsistency.java  
├── CausalConsistency.java  
├── SequentialConsistency.java  
├── PRAMConsistency.java  
├── IndependentConsistency.java  
└── mysql-connector-java-8.0.19.jar  

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🔍 Key Features

• RMI-based communication between clients and replicated servers.
• MySQL backend for persistent storage.
• Validation scripts to verify each consistency model’s guarantees.
• Thread-safe operations for concurrent client requests.

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📜 Citation

If you use this work, please link to the repository:

https://github.com/BhanuPrakashNani/Consistency_In_Replicated_DB_Systems  

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🤝 Contributing

Pull requests are welcome! For major changes, open an issue first.

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📄 License

MIT © Bhanu Prakash Poluparthi

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Let me know if you’d like to add:

• A diagram of the RMI architecture.
• Sample output logs for each consistency model.
• Instructions for Docker deployment.