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Every once in a while a customer will ask me what to do with these messages: health: HEALTH_WARN1 large omap objects First lets see what this means: Ceph services are…
For a Ceph cluster I have two Juniper QFX5100 switches running as a Virtual Chassis. This Virtual Chassis is currently only performing L2 forwarding, but I want to move this…
Prior to Ceph Luminous you could only set the noout flag cluster-wide which means that none of your OSDs will be marked as out. On large(r) cluster this isn’t always…
Sometimes you want to test if changes you are about to make to a CRUSH map will cause data to move or not. In this case I wanted to change…
The Ceph Mgr dashboard plugin allows for an easy dashboard which can show you how your Ceph cluster is performing. In certain situations you can’t contact the Mgr daemons directly…
For anybody enjoying Latin pop in the 2000’s, RBD was a popular Mexican pop band from Mexico City labelled by…
read moreCephadm is a great new feature of Ceph v15.2.0 (Octopus). By using cephadm, users have more freedom and flexibility to…
read moreCeph was developed by Sage Weil in 2003 as a part of his PhD project. It was open sourced in 2006 to serve…
read moreDuring our Ceph consultancy projects we often get questions about Ceph versions. A question we get a lot is about…
read moreIf you want to expand your Ceph cluster by adding a new one, it is good to know what the…
read moreCurrently we are planning a new Ceph Fundamentals training course for November or December. Because of this we thought it…
read moreAs performance optimization research might cost too much time and effort, here are some steps you might first want to…
read moreFile storage is a data storage format in which data is stored and managed as files within folders. Why would…
read moreWhen we work on Ceph storage infrastructures, we always ask to run a diagnostic tool first. For running these diagnostics,…
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