Turning hyper-v on and off

I use hyper-v on my laptop. When I know I don’t need VMs for the day, I can squeeze a bit more performance out of the machine by turning hyper-v off with: bcdedit /set hypervisorlaunchtype off and a reboot. To turn it back on: bcdedit /set hypervisorlaunchtype on (or auto start) and reboot.


What is new in virtualization with Windows Server 2008 R2?

There are some quite interesting improvements in Windows Server 2008 R2 (what was wrong with W7 as a name?) that help us progress toward a dynamic infrastructure. Three of them are worthy of highlighting: live migration of virtual machines in hyper-v, cluster shared volumes and core parking. 1. Live Migration Live migration refers to the…


Upgrading from an evaluation version

I have received a few questions about upgrades from the evaluation version that you can download from microsoft.com/hpc to a full version. The good news is that the evaluation version is fully functional, so you won’t need a complete re-installation. The only thing you need to do is obtain a full licence key, then: -…


Proxies and Compute Nodes

You’ve prepared your templates, configured your network, your firewalls and everything you could think of, yet your automated provisioning takes forever and eventually fails… Well, check if you have a patching task in your node template. If you do, you’ll need a way to reach the Microsoft Update service and download any patches. You may…


Upgrading to HPC Server 2008 RC1

Well, there is no upgrade path, so the quickest way is to re-image. Download the RC build of the HPC software from connect.microsoft.com. If you have Infiniband cards, download the latest WinIB-ND drivers ( from http://www.mellanox.com.    1. Re-image the head node and install the latest HPC pack. 2. Unzip the WinIB package on the…


Stop Climate Change?! – Part 2

I have been investigating some more in the area of Green IT, S+S. Some ideas and a lot of questions have come to mind. Please read on and let me know if they make any sense. By the way, Part 1 is here 🙂 1. How do you understand the status quo? This may prove…


I’ll be there in 2 microseconds!

Fantastic news! Mellanox has released the beta 2 version of their WinIB 1.4 stack, which works with HPC Server 2008 beta 2 and has Network Direct providers for their latest ConnectX cards. The results announced at ISC 08 are outstanding: – 2 microseconds’ latency – 2 GB/s throughput Another outstanding result for HPC Server 2008…


Teched session on HPC in top 20!

Phil Pennington and I presented a session on cluster performance optimization at Teched 2008 in Orlando. It made it in the top 20 list by customer satisfaction!!! To all those who were there and voted for us: Thank you!!! To all those who were not there but would still like to know about it: leave…


How fast is this thing, really?!

Microsoft entered the HPC market a couple of years ago with a value proposition based on ease of integration, use and management. The comment we received most often sounded more or less like this: "This is all well and good, but how fast is this thing, really?". Well, here are a couple of impressive answers:…


A Hybrid OS Cluster Solution

Thomas Varlet, of Microsoft France, and Dr. Patrice Calegari, of BULL SAS, have written an excellent paper on how to build hybrid clusters, i.e. clusters where 2 or more operating systems can be run at the same time. It is recommended reading, in my opinion, for those of us who use both Linux and Windows…