May 2018
Intermediate to advanced
256 pages
7h 6m
English
Content preview from OpenStack for Architects - Second Edition
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Ephemeral storage
Ephemeral storage is the storage that is consumed when a Glance image is copied locally to a compute node to instantiate a virtual instance. Glance images are typically sparse and tend to be less than 1 gigabyte in size. When instantiated, images provide the root disk for an instance's operating system. These are also sparsely provisioned, but typically grow up to 10, 20, or 40 gigabytes in size. In traditional OpenStack deployments, ephemeral storage is provided by the compute node's internal disks, and when a compute node fails or an instance is terminated, the storage is lost or reclaimed. These days, many organizations will choose to place ephemeral storage on shared storage.
There are two main reasons to use shared ...
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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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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.