When we put a .NET application on Windows on Hyper-V (or a Java application on Linux on ESXi) we are actually virtualizing twice. Can we virtualize only once, by putting the CLR or the JVM directly on the VM Host? In this action of course we remove the operating system. Oracle is taking the lead in this area with JRockit VE JVM. There is no VMware support, the only hypervisor it supports is Xen, or more precisely Oracle VM. it only comes bundled only with an Application Server, namely Oracle WebLogic Suite Virtualization Option. The entire stack inside the virtual machine is in “User Mode” in other words the JVM and the drivers are all in the same memory address space and you don’t need to switch contexts into Kernel Mode in order to perform I/O or network access. Does VMware have a strategic initiative (or even a skunkworks) to engineer a similar bundle for its SpringSource runtimes? Or are they just concentrating on scaling out with as per the Google announcement?
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Quite a bit has gone on in our industry in the last year. While this is not intended to be a comprehensive review of all that has occurred, we hope that we have captured the important events that have shaped virtualization and cloud computing.
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The team at Sun continue to update VirtualBox – 3 releases in 1 month. Of these the 3.0.12 release (November 17) and the 3.1.2 release (December 17) were maintenance releases with bug-fixes, whereas the 3.1.0 release (November 30) was a fairly substantial release containing new features, including Live Migration.
Cloud Computing ...
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There are two very recent vendor initiatives that hearken back to the days of single vendor tightly integrated systems. The first is Oracle’s pending acquisition of Sun. The second example which has potentially far more impact upon VMware is the recently announced EMC/Cisco Vblocks.