SUSE pulls the plug on SES. What are your options now?

A few months back the news came that SUSE stops supporting its Ceph-based SUSE Enterprise Storage (SES) product to their customers. And, with one eye on Rancher, will promote Longhorn instead. As we support mostly very avid Ceph storage teams we dove into the options you have if you are now a SUSE Enterprise Storage […]

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 […]

Comparing two Ceph CRUSH maps

Sometimes you want to test if changes you are about to make to a CRUSH map will cause data to move or not. In this case I wanted to change a rule in CRUSH where it would use device classes, but I didn’t want any of the ~1PB of data in that cluster to move. […]