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Django benefits from a thriving third-party ecosystem. This talk will take a deep look at three of the components I have found most useful in my own projects: Haystack for full-text search, Celery for offline processing and Fabric for automated deployments. I'll discuss how we use them for Lanyrd.com, and demonstrate why they deserve a permanent place in your toolbox.
by Mauro Rocco
Celery is an open source task queueing system based on distributed message passing.
I will talk about the tools that Celery offers for task distribution and how to monitor and manage the system using a Django web interface.
This talk will also focus on how we use Celery at Jamendo and our real solutions to some common issues you may encounter when developing a back-office based on Celery.
The talk will cover the following topics:
-- A brief overview of Celery and the AMPQ protocol.
AMPQ protocol overview
Celery, RabbitMQ code examples
-- The impact of Celery on the Jamendo work-flow; examples with real tasks.
Here I will talk about the Jamendo back-office infrastructure and some of our common tasks. I will discuss the improvements made by introducing a new back-office system based on Celery.
I will show some code snippets and go over some real scenarios.
-- Overview of the Django Celery admin interface and some Jamendo extensions
Let's talk about the Django-Celery interface that allows one to monitor or schedule tasks directly from the Django admin.
I will explain which common additional features are necessary and how to add them.
-- Common "gotchas" we encountered while working with Celery and how we solved them.
- Global task locks
- Centralized logging: be able to read all the logs of all celery workers on different servers and filter them for real-time debugging
20th–26th June 2011