Welcome to the Awesome Accord repository! This guide provides resources and examples for implementing ACID transactions in Apache Cassandra. Learn how to leverage distributed transactions for building reliable applications.

• Quick Start with Docker: Single-node deployment for immediate testing
• Lab Environment: Multi-node cluster setup for development
• Use Cases & Examples: Production-ready implementations
• Learning Resources: Documentation and best practices

Accord is in active development and still a feature branch in the Apasche Cassandra® Repo. You will find bug. What we ask is that you help with a contribution of a bug report.

You can use the Github discussions bug report forum for this or use the Planet Cassandra Discord channel for accord listed below. A bug report should have the folowing:

• The data model used
• Actions to reproduce the bug
• Full stack trace from system.log

If you have suggestions about syntax or improving the overall developer expirience, we want to hear about that to! Add it as a suggestion or feature request using Github discussions or let us know in the Planet Cassandra Discord.

Now, on to the fun!

docker pull pmcfadin/cassandra-accord
docker run -d --name cassandra-accord -p 9042:9042 pmcfadin/cassandra-accord

brew tap rustyrazorblade/rustyrazorblade
brew install easy-cass-lab

• Banking Transactions: Account transfers with ACID guarantees
• Inventory Management: Race-free inventory tracking
• User Management: Multi-table atomic operations

• Provide feedback and bug reports in the repository forum
• Join our Discord Community for discussions and support
• Review our Contributor Guide
• Submit issues and improvements through GitHub

/
├── docker/              # Docker configuration and setup
├── easy-cass-lab/      # Multi-node testing environment
├── examples/           # Implementation examples
│   ├── banking/       # Financial transaction examples
│   ├── inventory/     # Stock management examples
│   └── user-mgmt/     # User operations examples
└── docs/              # Guides and documentation

Our documentation includes:

• Comprehensive setup instructions
• Transaction patterns and implementations
• Performance optimization guides
• Troubleshooting and best practices

1. Choose your deployment option:
   • Docker Guide
   • Easy-Cass-Lab Guide
2. Follow the Quick Start Guide
3. Explore example implementations
4. Connect with our Discord community
5. Feedback! Github Discussions

BEGIN TRANSACTION
    LET fromBalance = (SELECT account_balance 
                      FROM ks.accounts 
                      WHERE account_holder='alice');
    IF fromBalance.account_balance >= 20 THEN
        UPDATE ks.accounts 
        SET account_balance -= 20 
        WHERE account_holder='alice';
        UPDATE ks.accounts 
        SET account_balance += 20 
        WHERE account_holder='bob';
    END IF
COMMIT TRANSACTION;

Apache License 2.0