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Professional SQL Server High Availability and Disaster Recovery

You're reading from Professional SQL Server High Availability and Disaster Recovery

Product type Book

Published in Jan 2019

Publisher Packt

ISBN-13 9781789802597

Pages 564 pages

Edition 1st Edition

Languages

Concepts

Author (1):

Ahmad Osama

Table of Contents (9) Chapters

Professional SQL Server High Availability and Disaster Recovery

Preface

1. Getting Started with SQL Server HA and DR

2. Transactional Replication

3. Monitoring Transactional Replication

4. AlwaysOn Availability Groups

5. Managing AlwaysOn Availability Groups

6. Configuring and Managing Log Shipping

Appendix

AlwaysOn Availability Group Concepts and Terminology

An AlwaysOn availability group is a group of databases that can fail over from a primary server to a secondary server automatically or manually, as and when required. Commonly known as AlwaysOn AGs, they're the premium high availability and disaster recovery solution available in SQL Server.

Other than being an HA and a DR solution, it can also be used to load-balance read workloads, for maintenance jobs such as backups, and for consistency checks on the secondary databases.

Availability Groups Concepts and Components

A typical AlwaysOn AG topology is shown in the following diagram:

Figure 4.1: Example of an AlwaysOn topology

The given AlwaysOn implementation consists of three replicas or nodes: Primary Replica, Secondary Replica 1, and Secondary Replica 2. The three nodes are part of the same domain name and the same Windows Server Failover Cluster.

An AlwaysOn AG consists of the following components.

Windows Server Failover Cluster

A Windows...

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Authors (1)

Ahmad Osama

Ahmad Osama works for Pitney Bowes Pvt. Ltd. as a technical architect and is a former Microsoft Data Platform MVP. In his day job, he works on developing and maintaining high performant, on-premises and cloud SQL Server OLTP environments as well as deployment and automating tasks using PowerShell. When not working, Ahmad blogs at DataPlatformLabs and can be found glued to his Xbox.

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