Transaction execution model in Redis - Mini Project: Build & Apply

Redis Transaction Execution Model

📖 Scenario: You are managing a simple Redis database for a small online store. You want to ensure that multiple commands that update the stock and sales count happen together without interference from other operations.

🎯 Goal: Build a Redis transaction that safely updates the stock and sales count for a product in one atomic operation.

📋 What You'll Learn

Create a Redis key for product stock with an initial value

Create a Redis key for product sales count with an initial value

Start a Redis transaction using MULTI

Queue commands to decrement stock and increment sales count

Execute the transaction with EXEC

💡 Why This Matters

🌍 Real World

Redis transactions help ensure that multiple related updates happen together without interference, which is important in inventory and sales systems.

💼 Career

Understanding Redis transactions is useful for backend developers and database administrators working with real-time data and caching systems.

1

Set initial product stock and sales count

Create two Redis keys: product_stock with value 100 and product_sales with value 0 using the SET command.

Redis

# Your code here

Need a hint?

Use SET command to assign values to keys.

2

Start the transaction

Start a Redis transaction by writing the MULTI command.

Redis

SET product_stock 100
SET product_sales 0
# Your code here

Need a hint?

Use MULTI to begin a transaction block.

3

Queue stock decrement and sales increment commands

Inside the transaction, queue the commands DECR product_stock to reduce stock by 1 and INCR product_sales to increase sales count by 1.

Redis

SET product_stock 100
SET product_sales 0
MULTI
# Your code here

Need a hint?

Use DECR and INCR commands to queue changes inside the transaction.

4

Execute the transaction

Complete the transaction by writing the EXEC command to execute all queued commands atomically.

Redis

SET product_stock 100
SET product_sales 0
MULTI
DECR product_stock
INCR product_sales
# Your code here

Need a hint?

Use EXEC to run all commands queued in the transaction.