Object-relational mappers such as Hibernate, LINQ, and Rail's ActiveRecord can greatly simplify creating database-backed web applications. These tools do such a good job of abstracting the database, that is possible to create very complex web applications without ever considering the database at all!. Unfortunately, ignorance is not always bliss. When naively programmed, seemingly trivial application code can cause inefficient queries at best, and scalability and concurrency nightmares at worst. This talk will show that while ORM's provide tremendous power and speed, it is still very important to know what is going underneath the comfortable abstraction layer the ORM provides. Examples will include identifying client-side joins, concurrency problems, and scalability issues.

Key Topics in this session will include:

• What ORMs are, and why you would use them
• Why remaining ignorant of your database is a recipe for disaster
• How to successfully use ORMs without sacrificing database performance
• How to identify scalability and concurrency problems

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Speaker Bio: Eric Farrar graduated from the University in Waterloo in Computer Engineering. He has worked in many industries including Wall Street financial (Morgan Stanley), automated manufacturing technology (Automation Tooling Systems Inc), and information technology (Platform Solutions Inc). He is presently a Product Manager at Sybase iAnywhere.