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How to handle large omap objects

How to handle large omap objects 1506 1001 Wout van Heeswijk

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…

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…

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