As an update to the earlier blog post, take a look below.
The threading model in DRBD Proxy 3.1 received a complete overhaul; below you can see the performance implications of these changes.
A question we see over and over again is Why is umount so slow? Why does it take so long? Part of the answer was already given in an earlier blog post; here’s some more explanation.
Recently we’ve upgraded one of our virtualization clusters (more RAM), and in the course of this did an upgrade of the virtualization hosts from Ubuntu Lucid to RHEL 6.3 — without any service interruption.
The Raspberry PI is a small ARM computer (hardware specifications in wiki, outline and FAQs). Of course, you can build a cluster with it!
Every now and then we get asked “why not simply use a mirrored SAN instead of DRBD”? This post shows some important differences.