DRBD is an acronym for Distributed Replicated Block Device. It is a Linux kernel module, that, working together with some scripts, offer a distributed storage system, frequently used on high availability clusters. DRBD works as a kind of network RAID.
This means DRBD can give high availability to MySQL users. Through configuring DRBD to be used on your system, you can have synchronous replication between two different servers, giving a MySQL database a failover server to redirect to instantaneously, should the main server running MySQL fail.
For those interested in more detail on how to combine DRBD and MySQL, let me mention that Kristian KÃƒÂ¶hntopp of MySQL has written a great blog article on "Quick tour of DRBD".
I was impressed when listening to DRBD's main author DI Philipp Reisner describing the technical workings and business opportunities of DRBD. In many respects, he reminds me of our very own Monty years ago.
I also learnt plenty of things from Florian Haas, Senior Software Engineer with Linbit. Among other things, he taught me that r is a vowel (in many of Austria's neighbouring countries), meaning that you can pronounce DRBD without spelling out the letters. Sounds like "Good day!" in Slovenian.
On a more serious note, I think the prospects for DRBD look fascinating. Or in other words, remembering my recent insight on vowels: DRBD rcks!