October 2021
Intermediate to advanced
746 pages
44h 42m
English
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Chapter 7: Saving power in disks, flash memories, and servers
Abstract
Power consumption is a major problem for server and storage clouds. We start the discussion with disk spindown in notebooks to increase battery lifetimes. Server energy can be saved by lowering voltage and in the case of disks by lowering RPMs and spindown. Massive Arrays of Independent Disks - MAID paradigm spins down most disks, but leaves a few disk spinning for caching recently accessed data and for new updates. Hybrid disks with a flash memory or NonVolatile RAM - NVRAM cache to hold updates can be spundown to save energy, since flash memories with no mechanical parts consume less energy than disks. Power consumption can be reduced by temporal and spatial clustering of ...
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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.