Book Image

Professional SQL Server High Availability and Disaster Recovery

By : Gethyn Ellis
5 (1)
Book Image

Professional SQL Server High Availability and Disaster Recovery

5 (1)
By: Gethyn Ellis

Overview of this book

Business continuity is of utmost importance. High availability (HA) and disaster recovery (DR) ensure that your infrastructure experiences no downtime and smoothly functions at all times. Sound knowledge of various HA and DR techniques help you to drastically reduce the downtime of your applications. This course begins by explaining the high availability and disaster recovery technologies available in SQL Server: Replication, AlwaysOn, and Log Shipping. You’ll learn what they are, how to monitor them, and how to troubleshoot any related problems. You’ll learn how to use different HA and DR topologies to create a highly available infrastructure that also includes hybrid topologies. You’ll learn what is Always On, it’s pros and cons, prerequisites, and restrictions. You’ll also learn about log shipping, one of the oldest SQL Server solutions, which is mostly used for DR and SQL Server migration. Through this course, you will be able to explore the technical implementations of high availability and disaster recovery technologies that you can use when you create a highly available infrastructure, including hybrid topologies. By the end of the course, you’ll feel confident and look forward to changing the game with robust and high performing infrastructure.
Table of Contents (7 chapters)
Chapter 1
Getting Started with SQL Server High Availability and Disaster Recovery
Content Locked
Section 3
What is High Availability and Disaster Recovery
High availability refers to providing an agreed level of system or application availability by minimizing the downtime caused by infrastructure or hardware failure. When the hardware fails, there's not much you can do other than switch the application to a different computer so as to make sure that the hardware failure doesn't cause application downtime. Disaster recovery refers to re-establishing the application or system connectivity or availability on an alternate site, commonly known as a DR site, after an outage in the primary site. The outage can be caused by a site-wide (data center) wide infrastructure outage or a natural disaster. In this section you will understand the following: - Uses - Terminologies, and - Solutions