March 2019
Intermediate to advanced
356 pages
10h 7m
English
Content preview from Mastering Ceph - Second Edition
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Split brain
The first issue that needs to be dealt with in clustering is the scenario where nodes of the cluster become disconnected and unaware of each other's status. This condition is known as split brain. In a two-node cluster, each node has no way of knowing whether the reason that it has lost communication with the other node is because the other node has gone offline or because there is some form of networking interruption. In the latter case, making the incorrect assumption and starting resources on both nodes would lead to data corruption. The way to work around split brain is to make sure a cluster always has an odd number of nodes; that way, at least two nodes should always be able to form quorum and agree that the third node is ...
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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.