At a client site we came upon a problem with Windows 2003 VM’s. They would get low network performance when we moved them to a newly formed ESX cluster consisting of HP 460c G6 blades. In some cases logging on to the server with a remote session took about 20 minutes.

As I mentioned this only occurred when we moved a VM to the new cluster, but also VM’s that where newly installed would get the same problem when running on the new cluster. As we are using Altiris to install and configure new VM’s a colleague decided to install a new VM by going through the steps manually which normally would be done by Altiris and found out that after the activation of a security template the performance dropped significantly.

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It is becoming a sequel, the datacenter VMware has build for this weeks VMworld 2009 at the Moscone Center in San Francisco.

In addition to our two previous articles (art1, art2), today we found two very nice videos loaded with tons of techno porno!

The first video shows the VMware team building the complete datacenter on-site at the Moscone Center. During the video footage the awesome numbers representing this huge infrastructure run by.

In short? 28 racks containing 776 ESX servers which provide the infrastructure with 37TB of memory, 6.208 CPU cores and 348TB storage which uses 528KW electricity and is servicing 37.248 virtual machines. You will probably never find such an infrastructure anywhere in the world, at least I know I won’t.

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Selecting physical server hardware while rounding up the business case is always a fun exercise, what do you need and what is smart too choose?

A question you should definitely ask yourself is are we going to scale up or to scale out or do both? With scaling up you will put more CPU power, Memory and network bandwidth in your physical servers to accommodate more virtual servers on it. With scaling out you just put another physical server box into the datacenter racks with the same dimensions as the other physical servers.

The pros and cons for scaling out versus scaling up.

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VMGuy posted a very very useful item today… The HCL is searchable!!

No more downloading PDF’s before you give an advice, just search the up to date HCL

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At the same client site where we had the problems with VMware Update Manager and ESXi we are now struggling with HA. We can NOT get it to work and even WMware support can NOT get it to work either. We have been on the phone with VMware support for almost a week now and have tried various fixes but none of them work. We created a hosts-file to rule out DNS problems, we added advanced HA settings like ‘das.allowNetwork[n]‘ and ‘das.allowVmotionNetworks‘, we created new clusters, checked FT_HOST files and deleted all host from the cluster to build it again from scratch. All without positive results.

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