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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…

Migration options for SUSE Enterprise Storage (SES) users 1350 900 Michiel Manten

Migration options for SUSE Enterprise Storage (SES) users

A few weeks ago, I posted a blog about how SUSE pulled the plug on SUSE Enterprise Storage (SES). SES…

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SUSE pulls the plug on SES. What are your options now? 1349 901 Michiel Manten

SUSE pulls the plug on SES. What are your options now?

A few months back the news came that SUSE stops supporting its Ceph-based SUSE Enterprise Storage (SES) product to their…

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RBD latency with QD=1 bs=4k 1500 1000 Michiel Manten

RBD latency with QD=1 bs=4k

You might be asking yourself, why talk about QD=1 bs=4k? Well, from the experience of Wido den Hollander, our colleague…

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5 more ways to break your Ceph cluster 1650 1100 Michiel Manten

5 more ways to break your Ceph cluster

While we’ve been working with customers using Ceph in a variety of ways, we have encountered some several ways to…

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42on at Ceph month! 1650 1100 Michiel Manten

42on at Ceph month!

With June already here, it is time for the annual Ceph month. Previously held as a conference and called Cephalocon,…

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A brief history on Ceph 2560 1440 Michiel Manten

A brief history on Ceph

Ceph has emerged as the leading distributed storage platform. By using commodity hardware and software-defined controls, Ceph has proven its…

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Cephalocon 2021, Let’s talk Ceph! 1500 1000 Michiel Manten

Cephalocon 2021, Let’s talk Ceph!

At this moment we are busy with the organization of another Cephalocon. Cephalocon is an annual event organized by the…

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ZFS and Ceph, what a lovely couple they make! 1500 1000 Michiel Manten

ZFS and Ceph, what a lovely couple they make!

Stable, secure data storage is probably one of the most important things in today’s data driven world. With the ability…

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