The importancy of upgrading and updating Ceph consistently
During our Ceph consultancy projects, we often get questions about Ceph versions. A question we get a lot is about what Ceph version should be used, do I use the latest or an earlier version? Another question is about running different Ceph versions on one cluster, is this a bad thing? I thought it might […]
Ceph RBD latency with QD=1 bs=4k
You might be asking yourself, why talk about QD=1 bs=4k? Well, from the experience of Wido den Hollander, our colleague at 42on, a single thread IO latency is very important for many applications. What we see with benchmarks is that people focus on high amounts of bandwidth and large amounts of IOps. They simply go […]