Juju is Ubuntu’s supported and preferred means of deployment automation for an OpenStack cloud. While in Juju, a deployment unit (a Juju charm) generally expects to fully own the filesystem it is being deployed on, Juju allows you to co-deploy charms on the same physical machines, by way of …

In case you need a quick overview of how many radosgw objects live in your Ceph cluster, here‘s how you do that in one (slightly involved) line of Python.

We’ve noticed that there are a few common misconceptions around radosgw performance, and we’re hoping that this post can clear up some of those.

radosgw is of course Ceph’s RESTful object gateway. That means that you can use any client that speaks the Amazon S3 or OpenStack …

This is a rather nasty bug in Ceph OSD, affecting 0.67 “Dumpling” and earlier releases. It is fixed in versions later than 0.70, and a simple workaround is available, but when it hits, this issue can be pretty painful.

Please read this post to the end. This is …

As Ceph author Sage Weil points out frequently, distributed storage solutions for all their goodness have a “dirty little secret”: No matter just how redundant and reliable they are by design, a bug in the storage software itself can be a real issue.

And occasionally, the bug doesn’t have …