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Creating a Management Routing Instance (VRF) on Juniper QFX5100

Creating a Management Routing Instance (VRF) on Juniper QFX5100 1414 1001 Wido den Hollander

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…

Setting noout flag per Ceph OSD

Setting noout flag per Ceph OSD 1630 1001 Wido den Hollander

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…

Comparing two Ceph CRUSH maps

Comparing two Ceph CRUSH maps 1500 1000 Wido den Hollander

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…

HAProxy in front of Ceph Manager dashboard

HAProxy in front of Ceph Manager dashboard 1500 1000 Wido den Hollander

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…

About RBD, Rados Block Device 2560 1437 Michiel Manten

About RBD, Rados Block Device

For anybody enjoying Latin pop in the 2000’s, RBD was a popular Mexican pop band from Mexico City labelled by…

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Managing containerized Ceph clusters with cephadm 1313 600 Michiel Manten

Managing containerized Ceph clusters with cephadm

Cephadm is a great new feature of Ceph v15.2.0 (Octopus). By using cephadm, users have more freedom and flexibility to…

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A huge thanks to Sage Weil 1740 1160 Michiel Manten

A huge thanks to Sage Weil

Ceph was developed by Sage Weil in 2003 as a part of his PhD project. It was open sourced in 2006 to serve…

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The importancy of upgrading and updating Ceph consistently 2070 1380 Michiel Manten

The importancy of upgrading and updating Ceph consistently

During our Ceph consultancy projects we often get questions about Ceph versions. A question we get a lot is about…

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Best practices for cephadm and expanding your Ceph infrastructure 1771 1180 Michiel Manten

Best practices for cephadm and expanding your Ceph infrastructure

If you want to expand your Ceph cluster by adding a new one, it is good to know what the…

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What about our Ceph Fundamentals training? 1740 1160 Michiel Manten

What about our Ceph Fundamentals training?

Currently we are planning a new Ceph Fundamentals training course for November or December. Because of this we thought it…

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Improving some aspects on your Ceph cluster 1740 1160 Michiel Manten

Improving some aspects on your Ceph cluster

As performance optimization research might cost too much time and effort, here are some steps you might first want to…

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How we use Ceph-Collect to work with you 1302 927 Michiel Manten

How we use Ceph-Collect to work with you

When we work on Ceph storage infrastructures, we always ask to run a diagnostic tool first. For running these diagnostics,…

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