Hyper-V Server First Impressions

by Aaron 06/11/09

Like most other IT professionals I have jumped on the virtualization bandwagon.  I started using VMware server about three years ago, and I continue to use it to a great extent to virtualize both Linux and Windows guests.  I’ve been very happy with the performance and ease of use.  Version 2 of the product does have some management interface issues, but overall support is good and things work as they should.

I’ve been planning on replacing five physical servers with two and wanted a more robust solution than host based virtualization offers. I don’t want to pay for the more advanced VMware product (I think they are calling it VSphere now?, used to be ESX Server).  Since my task is pretty minor in the realm of server consolidations I figured the two free products ESXi or Hyper-V Server would be the  best fit.

So much has been written about the benefits of virtualization, but to me the benefits of virtualizing servers are:

  • Simple disaster recovery
  • Improved failover and clustering options
  • Hardware independence
  • Server consolidation

Since I knew I wanted a bare metal solution I needed a newer hardware to support it.  Originally I was looking at Dell’s new line of Xeon 5500 series servers (T610).  But I was looking at a minimum of $5k for a decent system with enough storage for my needs.  I ended up spending about $2,300 on a SuperMicro system (5036-T) that supported the new Xeon 5500 series and included a 4 bay drive cage.  I configured the server with:

  • Xeon E5520 2.26 GHZ quad core chip
  • HighPoint 4320 RAID card
  • 12 GB RAM
  • four 320 GB WD RE3 hard drives.

Originally plan was to use ESXi, but it did not support the HighPoint RAID controller (I eventually was able to get drivers from HighPoint, though I never did test them).  After hitting that hurdle with ESXi I took a stab at Hyper-V Server.

Installation of Hyper-V server was very simple, downloaded the iso, burned to DVD and popped it into the new server.  The setup routine is the same familar windows setup that’s been around since windows 2000 (though it has been updated).  I was able to installed the HighPoint RAID driver without a hitch from CD.  I’m so glad windows added CD support for loading drivers in Windows setup, so we don’t have to create a floppy anymore.  I partitioned my 1TB of RAID5 storage with 2 partitions an 80GB for the Hypervisor and the remainder for the virtual machines.

When Hyper-V Server finally booted up I logged in and was presented with two command windows.  One a standard command prompt and the other a command screen with thirteen different options (see screen shot).

Capture

Notice there are no options here to manage guests.  For that you need the Hyper-V Manager.  This tool is available for free from Microsoft for Windows Vista and Windows 7.  Getting this tool to work on the other hand requires a bunch of manual configuration on both the server and the client you wish to manage the server from.  The best resource on figuring this out is a blog post from Hyper-V program manager here: Hyper-V Remote Mgmt

Capture2

What I learned is that the free Hyper-V Server is just like Windows Server 2008, but with only the Hyper-V and Server Core roles enable.  It appears that Microsoft intended for the Hyper-V to be managed from the host OS which is not an option with Server Core.  I was never able to get remote mgmt to work correctly w/o disabling the firewall on the server even after following all the instruction and documentation that I could find.  The documentation for Hyper-V Server is very lacking when compared to VMware’s products (hence the reason for this post). 

I was eventually able to get Hyper-V Manager to work successfully after considerable trial and error (disabling the firewall helped).  Hyper-V Manager is very similar to VMware server 1 interface.  Your first step is to setup your Virtual networks.  Since one of my guests was a 2003 server I had to first set it up with a legacy network adapter and install SP2 before I was able to install the Hyper-V integration components.  I also installed CentOS 5.2 successfully using the images provided by Jules.FM.  Jules has compiled in the integration components into CentOS allowing use of the synthetic network driver.  This worked wonderfully, great instructions provided by Jules.

So once I was up and running with my two virtual machines I notices some remote desktop and SSH were both laggy.  Also I noticed that if I pinged from with the guest OS I was getting very odd results, very erratic ping results (though no dropped packets), slow response times.  When pinging to the guest OS the results were as expected.  I tried the following without any results:

  • disabled TCP, UDP offloading in registry on Hyper-V Server (host) using registry
  • disabled TCP, UDP offloading in registry on guest using registry
  • disabled jumbo frames
  • updated network driver on host

What fixed the problem was going into the server bios and disabling the following:

  • Intel I/OAT
  • Intel VT-d

Once these were disabled networking in the guest OS’s started functioning as expected.  Overall I’m very pleased with the server setup and performance.  I’m glad I went with this system it’s really a better fit than what Dell or HP had to offer for a this small consolidation project.  My only complaint is that Microsoft does not provide a guide, or instructions for this version of their product.  I guess you get what you pay for…  Hence the need for additional community documentation.

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Review: Vista SP1 beta

by Aaron 10/20/07

I stumbled upon the fact the Vista SP1 beta was recently released and also the fact that there is a hack available the will allow the general public to install this beta.  I just wanted to pass my experience along because I found that the SP1 beta cleared up a couple of annoying issues that have really been bugging me since I started using vista 3 months ago.

My computer is a Dell Lattitue D630 with 2GB RAM, Nvidia grapics, 7200 RPM hard drive and core 2 duo 2.2ghz processor runnning Vista premium 32 bit.  With this configuration I thought I should have a pretty fast laptop, but my experience was slow boot/resume times and overall lagginess.  Below are a list of issues that have been noticably improved after installing SP1:

  1. Resume from sleep is much faster now it take less then 10 seconds to resume from sleep.  Previously this could take up to 2 minutes.
  2. More responsive UI, have not noticed any lagginess, I think this was related to some networking fixes in the service pack.
  3. Visual Studio 2005 runs better.  I have had nothing but problems with Visual Studio, some days it would work OK and other days it would be super slow to do code complete or syntax highlighting.  I think this may have been related to the networking fixes as well.

All in all I have not had any issues with the SP only improvements.  I'll be sure to update this post if I run into any SP related issues.

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Review: ScrewTurn Wiki

by Aaron 08/02/07

Background

About 2 months ago I was looking for a wiki platform for my day job (www.voler.com).  I was looking for an ASP.net based WIKI, but was open to other platforms...  Luckily I ran across ScrewTurn and was super impressed.  It seems to be a very well organized project utilizing the latest ASP.net platform features, plus it was very easy to get setup and customize.

Originally I wasn't sure what we would use a WIKI for, but I knew I needed some sort of intranet/document repository for the various departments at Voler.  It turns out the ScrewTurn is perfect as an Intranet platform.

Below are the top things that I like about ScrewTurn:

  • No DB required, it stores all articles (and previous version) as text files
  • Extensible modular platform, making it easy for others to build onto it
  • Support for single signon using Active Directory (someone is developing an extension for this)
  • Simple easy to understand framework (this means it's easy to customize)

go to http://www.screwturn.eu/Wiki.ashx  for more info.

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