January 2019
Intermediate to advanced
606 pages
15h 1m
English
book
Ceph: Designing and Implementing Scalable Storage Systems
by Michael Hackett, Vikhyat Umrao, Karan Singh, Nick Fisk
Content preview from Ceph: Designing and Implementing Scalable Storage Systems
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Tiering with erasure-coded pools
At the current time, Ceph doesn't support overwrite operations on erasure-coded pools and so cannot be directly used for storing RBD images. However, by the use of tiering, an erasure-coded pool can be used as the base pool and a 3x replica pool used as the top level. This allows the hot active dataset which will comprise of frequently accessed data, to sit in the top tier and any infrequently accessed cold data to reside in the base erasure-coded tier.
Care should be taken with this approach; although in theory, it sounds like a brilliant idea, it shouldn't be forgotten that in this configuration proxy writes are not supported to the base erasure-coded pool. All write operations to the base tier, therefore, ...
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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.