When DRBD 8.4.4 integrated TRIM/Discard support, a lot of things got much better… for example, 700MB/sec over a 1GBit/sec connection. Continue reading
In the “Root-on-DRBD” Tech-Guide we showed how to cleanly get DRBD below the Root filesystem, how to use it, and a few advantages and disadvantages. Now, if there’s a complete, live, backup of a machine available, a few more use-cases become available; here we want to discuss testing upgrades of production servers.
The threading model in DRBD Proxy 3.1 received a complete overhaul; below you can see the performance implications of these changes. Continue reading
For the people who don’t already have DRBD 8.4.3 deployed: here’s another good reason — Performance. Continue reading
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. Continue reading