Django Database Optimization

Pulling more out of Django application ,[object Object],[object Object],[object Object]

Perspective on databases ,[object Object],[object Object],[object Object]

Perspective on databases 2 ,[object Object],[object Object],[object Object],[object Object]

Development cycle with databases Migraine Designing schema Programming business logic Adding fixtures

With Django Code on diet Model Templates View Model serves as one point place for data schema and business logic Url patterns

Understanding Django application stack Server Database Layer User Interface Business Logic Common Storage

Problem with the stack Tightly coupled

General overview of django scaling ,[object Object],[object Object],[object Object],[object Object],[object Object]

Database scaling for django application ,[object Object],[object Object],[object Object],[object Object]

Schema design and modeling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Class Pizza(models.Model): pizza_type = models.CharField(choices=(('ch','chicken'), ('pr':'pepperoni'),) crust_type = models.CharField(choices=(('hr','hard'), ('fil', 'filled'),) topping_type = models.CharField(choices=(('fr', 'farm fresh veggies', ('hu','hunk of meat'),) date_of_order = models.DateTimeField(primary_key=true) Class Pizza(models.Model): pizza_type = models.CharField() crust_type = models.CharField() topping_type = models.CharField() date_of_order = models.CharField() Wrong Right

Debug the queries http://github.com/robhudson/django-debug-toolbar/tree/master

Data specific changes in the model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Database architecture for scaling (1) Loadbalancing ,[object Object],[object Object],[object Object],[object Object],Orders 2007 Load balancer Application Server 3 Orders 2007 Orders 2007 Orders 2007 Application Server 1 Application Server 2

Database architecture for scaling (2) Partitioning ,[object Object],[object Object],[object Object],[object Object],Pizza orders database Order 2007 Orders 2009 Orders 2008 Application Layer

Database architecture for scaling (3) Sharding ,[object Object],[object Object],[object Object],[object Object],Orders 2007 Application Layer Sharding logic Orders 2007 Orders 2007 Orders 2007

Example of sharding http://www.eflorenzano.com/blog/tag/database-sharding/

Where not to use django ,[object Object],[object Object],[object Object]

Django Database Optimization

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