April 2017
Intermediate to advanced
470 pages
11h 12m
English
Content preview from Mastering OpenStack - Second Edition
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Availability zones
The concept of Availability Zones (AZ) in Nova is to group together compute nodes based on fault domains: for example, all compute nodes hosted on a rack in the lab. All the nodes connect to the same Top-of-Rack (ToR) switch or are fed from the same Power Distribution Unit (PDU), and can form a fault domain as they depend on a single infrastructure resource. The idea of Availability Zones maps to the concept of hardware failure domains. Think of a situation when you lost network connectivity to a ToR switch or lost power to the rack of compute nodes due to the failure of a PDU.
With Availability Zones configured, the end users can still continue to launch instances just by choosing a different Availability Zone. One important ...
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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.
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