September 2014
Intermediate to advanced
936 pages
25h 44m
English
book
Professional Microsoft SQL Server 2014 Administration
by Adam Jorgensen, Bradley Ball, Steven Wort, Ross LoForte, Brian Knight
Content preview from Professional Microsoft SQL Server 2014 Administration
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Chapter 25AlwaysOn Availability Groups
WHAT'S IN THIS CHAPTER?
- Identifying all aspects of Availability Groups and mastering all their intricacies
- Researching hardware and software configurations to identify what works best for your organization
- Configuring hardware and then clustering the operating system
- Configuring SQL Server 2014 Availability Groups
- Administering and troubleshooting the production SQL Server 2014 Availability Group
- Testing, monitoring, and tuning for performance
An Availability Group is a feature of AlwaysOn in SQL Server 2014 delivering robust, high-availability enhancements that greatly improve the data mirroring capabilities that shipped starting with SQL Server 2005. With AlwaysOn, SQL Server 2014 implements Availability Groups that deliver similar capabilities to database mirroring. In addition to these key enhancements, it can support up to nine replica partners, multiple databases in a single group, and readable replica secondary servers. The primary and replica servers can be mixed in asynchronous/synchronous modes and do not require shared disks. As a result, they can deploy across different geographical locations.
When these databases have dependencies, you can group them in a single Availability Group to failover together as a single failover unit. For example, by supporting readable replica servers, you can offload a reporting or read-only workload to a secondary replica, reducing the load on the primary replica and thus enabling it to scale ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.