Book Image

Microsoft SQL Server 2008 High Availability

By : Hemantgiri S. Goswami
Book Image

Microsoft SQL Server 2008 High Availability

By: Hemantgiri S. Goswami

Overview of this book

<p>Every business has it's mission critical applications and data. Therefore, it is very important to keep database servers up and running all the time – 24 X 7. There is a need to store and process terabytes of data to cater for business needs, and it is vital to make data highly available.<br /><br />High availability is all about the site being accessible all the time. High availability solutions minimize the downtime for these mission critical applications.</p> <p>Microsoft SQL Server is a powerful relational database engine, widely used to store and maintain data in Enterprises of various levels be they small, medium or large.</p> <p>This book will teach you how best to use these readily-available options and save you time in making your websites highly available.<br /><br />This Microsoft SQL Server 2008 High Availability book will take you through pre and post installation concepts and common issues you come across while working with SQL Server HA. It will teach you how these various HA solutions can be installed using GUI and the command line. It will also show you how to troubleshoot common issues you may encounter whilst installing or managing the HA option in your environment. It provides references to external links for more advanced learning on the topic.<br /><br />This book starts with an introductory chapter into the windows domain, domain users and various handshake methods available with Windows server. It also offers information the different authentication methods available with SQL Server - giving you an insight into the importance of security. After you are through with the security aspects, your journey to installing SQL Server HA will start. It will cover the concepts of database mirroring, log shipping, clustering, and replication.<br /><br />By the end of this book you will be confident enough to take up the challenge to install any of the SQL Server HA options.</p>
Table of Contents (18 chapters)
Microsoft SQL Server 2008 High Availability
Credits
Foreword
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface

Installing Multi-instance (Active/Active) Failover Cluster


We have just covered the installation procedure for the Single-instance Failover Cluster for SQL Server 2008 R2. Now let's move on and have a look at Multi-instance, that is, the Active/Active Failover Cluster. Before we get started, I would like to clear some queries.

  • Query: What is the difference between Active/Passive and Active/Active Failover Cluster?

    Answer:In reality, there is only one difference between Single-instance (Active/Passive Failover Cluster) and Multi-instance (Active/Active Failover Cluster). As its name suggests, in a Multi-instance cluster, there will be two or more SQL Server active instances running in a cluster, compared to one instance running in Single-instance. Also, to configure a multi-instance Cluster, we may need to procure additional disks, IP addresses, and network names for the SQL Server.

  • Query: What is the benefit of having Multi-instance, that is, Active/Active configuration?

    Answer:Depending on...