September 2013
Intermediate to advanced
864 pages
28h 43m
English
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Datacenter Activation Coordination
Some DAGs are deployed across data centers in multiple sites. These environments create a specific problem when catastrophic hardware failures occur that knock out a complete data center. Normally, when multiple servers in a DAG are affected, the DAG remains online if quorum can be maintained or stays offline until the majority of the servers are restored to good health and come online again to establish quorum. At this point, Active Manager attempts to restart DAG operations and activate databases to recover from the failure.
Things are a little more complex when a DAG stretches across multiple data centers, especially if the network connections between the two data centers are lost. As the DAG members gradually ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.