When you manage a large cluster, you do not always know where your OSD are located.
Sometimes you have issues with PG such as unclean or with OSDs such as slow requests.
While looking at your ceph health detail you only see where the PGs are acting or on which OSD you have slow requests.
Given that you might have tons of OSDs located on a lot of node, it is not straightforward to find and restart them.
Infernalis has just been released a couple of weeks ago and I have to admit that I am really impressed of the work that has been done. So I am going to present you 5 really handy things that came out with this new release.
Date: 29/10/2015 Video: Download the slides here.
Today I gave a presentation (in french) at the OpenStack Meetup 17 in Paris, France. Slides are in english so you can have a look. :)
I have been waiting for this feature for more than a year and it is almost there! This likely brings us one step toward diskless compute nodes. This “under the hood” article will explain the mechanisms in place to perform fast and efficient Nova instance snapshots directly in Ceph.
Configure a Nova hypervisor with more than one backend to store the instance’s root ephemeral disks.
Quick tip to release the memory that tcmalloc has allocated but which is not being used by the Ceph daemon itself.
This article simply relays some recent discovery made around Ceph performance. The finding behind this story is one of the biggest improvement in Ceph performance that has been seen in years. So I will just highlight and summarize the study in case you do not want to read it entirely.
With this article, I would like to take the opportunity to thank you all for voting for our presentation. It is always with a great pleasure that we will give you the last updates of Ceph developments happening in OpenStack.
Ceph talks coverage at the next OpenStack summit:
Quick and simple test to validate if the RBD cache is enabled on your client.