Logging in Ceph
Configure logging in Ceph.
Where does my instance run?
Several way to know where your instances run.
Cleanup keystone tokens
Every once in a while you really want to cleanup the token table of the Keystone database. A couple of weeks ago while backuping my cloud controller I noticed that the backup of the Keystone database was longer than the other databases. After that, I checked the size of the dump (compressed) 60MB. Hummm but there is almost nothing in the Keystone database: users, tenants… wait.. could it be TOKENS?!
Ceph: manage storage zones with CRUSH
This article introduces a simple use case for storage providers. For some reasons some customers would like to pay more for a fast storage solution and other would prefer to pay less for a reasonnable storage solution.
Ceph and MDS
I’ve been often asked a couple of time, why CephFS is not ready? Does this statment is still true?
Tip: lock an instance against admin permissions
Couple of days ago I was looking for a way to lock an instance but something more powerful than a simple lock via the nova API.
Tip: Add a specific keypair to a flavor
Folsom brought a lot of new features, however while playing with nova-manage, I came across a new option, option that I found very useful and that I’m about to share with you.
Optimized your SSD
I would like to share with you readers some of the optimizations I made on the SSDs storing my Ceph Journals. This article has been placed into the ceph categorie, but it’s more general best practices SSDs.
Ceph: inject configuration without restart
Usually, you don’t always want to restart your daemon everytime you change your configuration. Fortunatly, Ceph supports parameter injection!
Ceph: placement groups
Quick overview about placement groups within Ceph.