Ceph: real men use the memstore backend
A simple in-memory backend that stores objects in RAM is available since version 0.76 and will land with Firefly. Quick look at this new feature.
See you at the Cephdays in Frankfurt
A quick post to tell everybody that I’ll be giving a presentation at the Ceph day in Frankfurt. Obviously, I’ll be representing the company I work for, eNovance. The event is next Thursday, February 27, 2014. I am going to talk about Ceph, performance and benchmarking. You can check the details and schedule of the event here. See you there!
Ceph IO patterns: the ugly
Ceph IO patterns analysis final part: The Ugly.
Ceph IO patterns: the bad
Ceph IO patterns analysis part 2: The Bad.
Ceph IO patterns: the good
Ceph IO patterns analysis part 1: The Good.
Ceph: snapshot a RBD instance with QEMU-UTILS
Quick tip to perform a full snapshot of an RBD image. (only MtG players can recognize this picture!)
Check if KVM has the support of Ceph
As you may know Ceph is not part of Debian Wheezy, thus QEMU-KVM was not compiled with the Ceph support (--enable-rbd with both librbd and librados).
This article is just a quick tip to detect if your QEMU-KVM has the support of Ceph.
Ceph: managing CRUSH with the CLI
Getting more familiar with the Ceph CLI with CRUSH.
Ceph admin API init script
Ceph admin API init script.
Real size of a Ceph RBD image
RBD images are thin-provisionned thus you don’t always know the real size of the image. Moreover, Ceph doesn’t provide any simple facility to check the real size of an image. This blog post took his inspiration from the Ceph mailing list.