October 2017
Intermediate to advanced
340 pages
9h 46m
English
Content preview from Learning Ceph - Second Edition
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PG states
We can divide PG states into three categories: Critical, Warning, and Info. PG states in the Critical category indicate severe damage to the cluster and immediate action should be taken to resolve their issues. For example, if we are running out of space on an OSD, we will see the backfill-toofull state being applied. If a PG has lost all OSDs assigned to hold its replicas, then it will be marked as inactive and the client I/O grinds to a halt. PGs in the Warning category indicate that something is wrong with the cluster that needs to be fixed, but there most likely is not major impact to client I/O that would lead to its complete stoppage. PGs in the Info category do not indicate an issue with the cluster, but rather convey routine ...
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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.