Lecture 20: ORM, DryadLINQ

Read:

Yu, Yuan, et al. "DryadLINQ: A System for General-Purpose Distributed Data-Parallel Computing Using a High-Level Language." OSDI, 2008. ( This resource may not render correctly in a screen reader. PDF)

DryadLINQ is a programming language for manipulating structured data in a distributed setting. It provides a collection of SQL-like constructs that are well-integrated into C# (with a common type and object system), and compiles down to a graph of operators spread across a distributed network of machines in a way similar to how distributed databases work.

As you read the paper, consider the following questions:

What are the advantages of a query language that is integrated into the programming language? Are there disadvantages?
Dryad execution plans look a lot like database query plans, but are different in some ways — in particular, operators can have multiple outputs; what are the implications of this from a query execution perspective?

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