March 2019
Intermediate to advanced
356 pages
10h 7m
English
Content preview from Mastering Ceph - Second Edition
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Slow OSDs
Sometimes an OSD may start performing very poorly for no apparent reason. If there is nothing obvious being revealed by your monitoring tools, consult ceph.log and the Ceph health detail output. You can also run Ceph osd perf, which will list all the commit and apply latencies of all your OSDs and may also help you identify a problematic OSD. If there is a common pattern of OSDs referenced in the slow requests, there is a good chance that the mentioned OSD is the cause of the problems. It is probably worth restarting the OSD in case that resolves the issue; if the OSD is still problematic, it would be advisable to mark it out and then replace the OSD.
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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.
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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.