December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
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AlwaysOn Availability Groups
Figure 43.1 also shows the availability group capability. Availability groups are focused on database-level failover and availability by utilizing a data redundancy approach. Again, borrowing from the database mirroring experience (and underlying technologies), a transactionally consistent secondary replica is made that can be used for both read-only access (active for use at all times) and for failover if the primary database (primary replica) fails for any reason. In Figure 43.1, you can see a SQL Server AlwaysOn availability group being used for HA and even for distributing the read-only workload off of the primary SQL Server instance to the secondary replica. You can have up to four secondary replicas in an
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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.