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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iostat
iostat can be used to get a running overview of the performance and latency of all the disks running in your OSD nodes. Run iostat with the following command:
iostat -d 1 -x
You will get a display similar to this, which will refresh once a second:
As a rule of thumb, if a large number of your disks are showing a high % util over a period of time, it is likely that your disks are being saturated. It may also be worth looking at the r_await time to see if read requests are taking longer than what should be expected for the type of disk in your OSD nodes. As mentioned earlier, if you find that high disk utilization is the cause of slow ...
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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.