OpenStack Glance: disable cache management while using Ceph RBD
The OpenStack documentation often recommends to enable the Glance cache while using the default store file, with the Ceph RBD backend things are slightly different.
Read more →OpenStack Glance: allow user to create public images
Since Juno, it is not possible anymore for an user to create public images nor make one of his images/snapshots public. Even though this new Glance policy is a good initiative, let’s see how we …
Read more →Ceph: monitor store taking up a lot of space
During some strange circonstances, the levelDB monitor store can start taking up a substancial amount of space. Let quickly see how we can workaround that.
Read more →Interested in Ceph? Join us at the OpenStack summit in Paris!
The next OpenStack summit is just around the corner and as usual Josh Durgin and I will lead the Ceph and OpenStack design session. This session is scheduled for November 3 from 11:40 to 13:10, find …
Read more →See you at the CephDay London 2!
This second edition of the CephDay London looks really promising. You should definitely look at the agenda! Talks go from OpenStack to deep performance studies and crossing CephFS news! Check this …
Read more →Ceph: how to test if your SSD is suitable as a journal device?
A simple benchmark job to determine if your SSD is suitable to act as a journal device for your OSDs.
Read more →Ceph and Enhanceio
Almost two years ago, I was writing the results of the experiments with Flashcache. Today this blog post is a featured post, this howto was written by Andrei Mikhailovsky. Thanks for his contribution …
Read more →CephDays Paris: Ceph in OpenStack and deploy Ceph!
My slides from the CephDays in Paris. Main topics were: Status of Ceph in OpenStack (Juno cycle) Deploy Ceph with Ansible Video: Slide:
Read more →Ceph: RBD import and export get parallelized in Giant
Features for the seventh Ceph release (Giant) have been frozen 3 weeks ago. Thus Giant is just around the corners and bugs are currently being fixed. This article is a quick preview on a new feature.
Read more →Analyse Ceph object directory mapping on disk
Useful to understand benchmark result and Ceph’s second write penalty (this phenomena is explained here in the section I.1).
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