March 2019
Intermediate to advanced
356 pages
10h 7m
English
Content preview from Mastering Ceph - Second Edition
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Queue depth
Since kernel 4.0, the RBD driver uses blk-mq, which is designed to offer higher performance than the older queuing system. By default, the maximum outstanding requests possible with RBD when using blk-mq are 128. For most use cases, this is more than enough; however, if your workload needs to utilize the full power of a large Ceph cluster, you may find that only having 128 outstanding requests is not enough. There is an option that can be specified when mapping the RBD to increase this value, which can be set next.
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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.