Queue-Based Task Distribution
Learn how message queues like Redis and Celery decouple URL discovery from fetching to scale scraping across many workers.
The Scaling Bottleneck
A single-process scraper is limited by one machine's CPU and network. To scale, you split work across many workers running in parallel, possibly on different servers.
A task queue is the glue that distributes work safely.
Producers and Consumers
The queue pattern has two roles:
- Producers discover URLs and push tasks onto the queue.
- Consumers (workers) pull tasks and fetch the pages.
Decoupling them lets each side scale independently.
All lessons in this course
- Distributed Scraping with Scrapy
- Cloud Functions for Scraping
- Monitoring and Logging
- Queue-Based Task Distribution