VMware Fault Tolerance

Incredible news from VMworld 2008 outlines a completely new way of building fault tolerant systems, using VMware virtual machines in such a way that you actually run two instances of the same server at the same time, the other instance is just not connected to the network.
Check out this great blog entry outlining the functionality (and some caveats). Seems like a treat if it Actually Works[tm], will need to check it out.

VisualVM

So Oracle (née BEA) JRockit has Mission Control, anyone with rapstar money to use has CA Wily Introscope and everyone else had Sun JConsole, which did not console (sorry) much the developer wanting to profile their application during runtime.

Therefore I was very happy to notice (belatedly) VisualVM tool from Sun, which will obviously replace the monitoring functionality of JConsole. Looks nice and is extendible, let’s see where they will go with it.