and most common SQL databases. Robust Using RabbitMQ, celery survives most error scenarios, and your tasks will never be lost. Dis- tributed Runs on one or more machines. Supports clustering when used used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your dads laptop while the queue is temporarily overloaded). Concur- rency Tasks are executed in parallel it. Result Stores Database, MongoDB, Redis, Tokyo Tyrant, AMQP (high performance). Web- hooks Your tasks can also be HTTP callbacks, enabling cross-language communication. Rate limiting Supports

Configuration Running the celery worker server Executing the task First steps with Django Configuring your Django project to use Celery Running the celery worker server Defining and executing tasks Periodic and most common SQL databases. Robust Using RabbitMQ, celery survives most error scenarios, and your tasks will never be lost. Distributed Runs on one or more machines. Supports clustering when used used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your dads laptop while the queue is temporarily overloaded). Concurrency Tasks are executed in parallel

and most common SQL databases. Robust Using RabbitMQ, celery survives most error scenarios, and your tasks will never be lost. Dis- tributed Runs on one or more machines. Supports clustering when used used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your dads laptop while the queue is temporarily overloaded). Concur- rency Tasks are executed in parallel it. Result Stores Database, MongoDB, Redis, Tokyo Tyrant, AMQP (high performance). Web- hooks Your tasks can also be HTTP callbacks, enabling cross-language communication. Rate limiting Supports

and most common SQL databases. Robust Using RabbitMQ, celery survives most error scenarios, and your tasks will never be lost. Distributed Runs on one or more machines. Supports clustering when used used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your dads laptop while the queue is temporarily overloaded). Concurrency Tasks are executed in parallel ignore it. Result Stores Database, MongoDB, Redis, Tokyo Tyrant, AMQP (high performance). Webhooks Your tasks can also be HTTP callbacks, enabling cross- language communication. Rate limiting Supports

tolerant Excellent configurable error recovery when using RabbitMQ, ensures your tasks are never lost. scenarios, and your tasks will never be lost. Dis- tributed Runs on one or more machines. Supports used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your grandma’s laptop to help if the queue is temporarily congested). Concur- rency Concurrency is achieved Stores Database, MongoDB, Redis, Tokyo Tyrant, Cassandra, or AMQP (message notification). Web- hooks Your tasks can also be HTTP callbacks, enabling cross-language communication. Rate limiting Supports

SQL databases. Fault- tolerant Excellent configurable error recovery when using RabbitMQ, ensures your tasks are never lost. Dis- tributed Runs on one or more machines. Supports broker clustering and used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your grandma’s laptop to help if the queue is temporarily congested). Concur- rency Concurrency is achieved Result Stores Database, MongoDB, Redis, Cassandra, or AMQP (message notification). Web- hooks Your tasks can also be HTTP callbacks, enabling cross-language communication. Rate limiting Supports

and most common SQL databases. Robust Using RabbitMQ, celery survives most error scenarios, and your tasks will never be lost. Dis- tributed Runs on one or more machines. Supports clustering when used used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your dads laptop while the queue is temporarily overloaded). Concur- rency Tasks are executed in parallel it. Result Stores Database, MongoDB, Redis, Tokyo Tyrant, AMQP (high performance). Web- hooks Your tasks can also be HTTP callbacks, enabling cross-language communication. Rate limiting Supports

Fault-tolerant Excellent configurable error recovery when using RabbitMQ, ensures your tasks are never lost. scenarios, and your tasks will never be lost. Distributed Runs on one or more machines. Supports used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your grandma’s laptop to help if the queue is temporarily congested). Concurrency Concurrency is achieved Stores Database, MongoDB, Redis, Tokyo Tyrant, Cassandra, or AMQP (message notification). Webhooks Your tasks can also be HTTP callbacks, enabling cross- language communication. Rate limiting Supports

SQL databases. Fault- tolerant Excellent configurable error recovery when using RabbitMQ, ensures your tasks are never lost. Dis- tributed Runs on one or more machines. Supports broker clustering and used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your grandma’s laptop to help if the queue is temporarily congested). Concur- rency Concurrency is achieved Stores Database, MongoDB, Redis, Tokyo Tyrant, Cassandra, or AMQP (message notification). Web- hooks Your tasks can also be HTTP callbacks, enabling cross-language communication. Rate limiting Supports

the Django Database Using MongoDB Using CouchDB Using Beanstalk First steps with Celery Choosing your Broker Creating a simple task Configuration Running the celery worker server Executing the task Where SQL databases. Fault-tolerant Excellent configurable error recovery when using RabbitMQ, ensures your tasks are never lost. Distributed Runs on one or more machines. Supports broker clustering and HA used in combination with RabbitMQ. You can set up new workers without central configuration (e.g. use your grandma’s laptop to help if the queue is temporarily congested). Concurrency Concurrency is achieved