Book Image

What's New in SQL Server 2012

Book Image

What's New in SQL Server 2012

Overview of this book

Microsoft SQL Server has been part of the enterprise database landscape since SQL Server 7 arrived in 1998 and has evolved into the relational and BI platform of choice by businesses around the globe. The performance and full feature set of SQL Server has been widely recognized by the business community and it is viewed as a powerful weapon in their database and business intelligence arsenal. SQL Server brings numerous benefits to all businesses, central to which is a thorough understanding of the technology, both current and new.This is the book both DBAs and developers always wanted to buy but could never find in the bookstore. This is a SQL Server book that contains only the new features introduced in SQL Server 2012.This book will give you a competitive advantage by helping you to quickly learn and understand the new features of SQL Server 2012. Most readers will already have an established knowledge of SQL Server and will want to update their 2008/2008R2 knowledge swiftly with least pain.This book takes you through all of the new features of SQL Server 2012, from installing core database services and features, to the new administration and updated Transact-SQL functions. You will discover the new Analysis Services features, introduce data alerts and reporting features and explore the new enhancements to Integration Services. In addition you will learn how to automate, cleanse and transform critical business data with DQS and world-class enterprise level availability features.Finally, you will venture into simulating real-world database loads using Distributed Replay and complete your journey with a look at the new SQL Server cloud services and the new Hadoop big data platform.
Table of Contents (19 chapters)
What's New in SQL Server 2012
Credits
About the Authors
Acknowledgment
Acknowledgment
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
1
Installing SQL Server 2012
Index

Chapter 9. Distributed Replay

SQL Server has included the ability to replay a trace captured in SQL Server Profiler for quite some time. This feature allows us to run a real-life transactional load against a test or development server, which is useful for simulation purposes.

However, the Achilles' heel of this ability has been that it has only been possible to replay the trace from a single machine, thereby capping its scalability. This limits the usefulness of the tool as it cannot realistically simulate heavy, mission critical loads. In turn, this means you don't always receive meaningful results.

Thankfully, this is not the case anymore. In SQL Server 2012, Microsoft introduces Distributed Replay. This allows DBAs to run that load concurrently from up to 6 client machines. If you are thinking "only 16?", then how about 16 clients x 512 threads per client, or over 8,000 concurrent connections on the Enterprise Edition of SQL Server 2012? This is a very useful feature indeed, not only for...