Was Redis used in combat tasks and for what exactly?

Redis is a high-performance in-memory data store supporting various data structures. In production environments, Redis is often used for:

• Data caching. Accelerating access to frequently used information, reducing load on the database.
• Session storage. Fast storage and retrieval of user session data.
• Message queues. Using lists and pub/sub for organizing task or event queues.
• Rate limiting. Tracking the number of requests from a user over a certain period.
• Temporary data storage. For example, authentication tokens with TTL.

Example of using Redis for caching in Python with the redis-py library:

import redis

r = redis.Redis(host='localhost', port=6379, db=0)

# Save a value with a key and a TTL of 60 seconds
r.set('user_123_profile', 'data', ex=60)

# Retrieve the value
profile = r.get('user_123_profile')
if profile:
    print('Cache found')
else:
    print('Cache missing, need to load from DB')