Scott's Weblog The weblog of an IT pro specializing in virtualization, networking, open source, and cloud computing

Calculating VMware HA Failover Capacity

Most readers probably know that VMware High Availability (or VMware HA) is the feature of VMware Infrastructure 3 that allows for virtual machines (VMs) to be rebooted on another available host in the event of an unexpected host failure. In these types of scenarios, a physical host goes down unexpectedly, typically due to hardware failure, and with it go a bunch of VMs. With VMware HA, these downed VMs will reboot on a different physical server in the HA cluster, thus minimizing downtime.

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CentOS 5 Active Directory Integration Problem

Since I had CentOS 5 up and running on ESX Server in the test lab, I decided to try to validate my latest Linux-AD integration instructions on this installation. Unfortunately, the instructions do not seem to work well at all with CentOS 5; here are some of the errors that I ran into:

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Oddity with Windows NFS Server

I was reconfiguring NFS on the Windows Server 2003 R2-based file server providing both CIFS and NFS storage to the lab at the office when I ran into a strange issue.

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Some Notes on Solaris-AD Integration

This afternoon, I walked back through my own instructions for integrating Solaris 10 and Active Directory, and I found that the process wasn’t as smooth as perhaps I’d believed it to be. As a result of walking back through the process again myself, I’ve collected some notes. At some point in the near future, these notes will be integrated into a new version of the Solaris-AD integration instructions.

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Is Apple Doing Enough for Mac Security?

Apparently, a bug similar to one fixed by Apple in March 2006 has appeared in Leopard. More information is available from the heise Security and Dark Reading web sites.

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A Good Look at ESX Server I/O

This article showed up in my RSS feeds; it’s a fairly in-depth look at the ESX Server I/O stack, written by Nick Triantos. Nick is with Network Appliance; I believe in their Global Services division. I’ve bookmarked it for a more comprehensive review later, when I can really dedicate myself to the information he’s sharing here.

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Happy Thanksgiving!

For those of you that celebrate the Thanksgiving holiday, I hope that your holiday is a pleasant one. I hope that you take the time to reflect upon all the blessings that God has poured out upon you, and to be thankful for everything good in your life. I know that I am. God bless you, and happy Thanksgiving!

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Quicksilver SSH Plugin

If you’ve been reading my blog for any reasonable length of time, you already know that I value the Mac OS X-only utility Quicksilver. It took me some time to get accustomed to it, but I quickly found it indispensable. Since that time, I’ve been staying alert for new plugins that will help make my life easier.

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Customizing the Sysprep.inf Created by VirtualCenter

The support that VMware VirtualCenter provides for using Sysprep to clone Windows virtual machines (VMs) is a key part of VMware’s quick provisioning functionality. While VirtualCenter provides a means for creating unattended answer files (via Customization Specifications), it does not provide a way to allow users to customize the Sysprep.inf that is generated by VirtualCenter. Of course, that is not to say that such customization isn’t possible, just that there isn’t a pretty graphical interface provided for it. Fortunately, the process for customizing the Sysprep.inf isn’t too terribly difficult.

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VMware Referral Program

Some of you may have noticed the new “I Recommend VMware Workstation” and “I Recommend VMware Fusion” icons at the bottom of the sidebar on the right. I hadn’t written specifically about these, but thought it might be a good idea to mention them. This is part of a new referral program that VMware is testing. If you are at all interested in using either of these programs and haven’t already purchased them, please consider using the links from this site. Thanks!

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