🗄️ Key-Value Store Simulator

This project is a simplified NoSQL key-value store written in Python.
It simulates core concepts used in distributed systems, including:

• Configurable strong vs. eventual consistency.
• Write-Ahead Logging (WAL) for durability.
• Disk-backed persistence.
• Time-to-Live (TTL) support for automatic key expiration.
• Conflict resolution logic using timestamps (last write wins).

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⚙️ Features

✅ Strong and eventual consistency

• You can choose if reads should always be up-to-date (strong) or allow a slight delay (eventual).

✅ Versioned updates with timestamps

• Every key tracks its version and timestamp, similar to how real systems manage updates and conflicts.

✅ Write-Ahead Logging (WAL)

• All updates and deletes are logged before being applied, helping simulate crash recovery.

✅ Disk persistence

• Keys and their metadata are saved to disk (store_data.json) and can survive restarts.

✅ TTL (Time-to-Live)

• Keys automatically expire if they live past the configured TTL.

✅ Conflict resolution

• If two writes happen with different timestamps, "last write wins" logic resolves the conflict.

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How to run (CLI)

python run_store.py

How to run Streamlit

streamlit run app.py