March 2019
Intermediate to advanced
356 pages
10h 7m
English
Content preview from Mastering Ceph - Second Edition
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Multi-MDS
A new feature of CephFS is the support for multiple active MDSes. Previously, it was only recommended to have a single active MDS with one or more standby, which for smaller CephFS deployments was more than adequate. However, in larger deployments, a single MDS could possibly start to become a limitation, especially due to the single-threaded limitation of MDSes. It should be noted that multiple active MDSes are purely for increased performance and do not provide any failover or high availability themselves; therefore, sufficient standby MDSes should always be provisioned.
When multiple active MDSes are present, the CephFS filesystem is split across each MDS so that the metadata requests are hopefully not all being handled by a ...
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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.