February 2018
Intermediate to advanced
300 pages
6h 17m
English
Content preview from Extending OpenStack
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Stacking or spreading
Although Nova exposes several filters for better computing workload distribution and management, you may encounter a problem where you are not able to spawn more instances even though Horizon is showing free resources. By default, instances will be spread across the selected compute nodes one by one. This ensures that the compute workload is fairly distributed across all hosts. Eventually, the behavior of the scheduler as to how to dispatch the instances across compute nodes can be tricky in this case. By default, filters provide a finely selected list of hosts. Requesting different instances with different flavors would create a sort of concurrency, and even prevent them from creating additional instances with larger ...
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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.
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.