Gabe asked the question on one of my recent posts if it made sense to enable Hot-Add by default and if there was an impact/overhead? Lets answer the impact/overhead portion first, yes there is an overhead. It is in the range of percents. You might ask yourself where this overhead is coming from and if that is vSphere overhead or… [...]
I am working on a “top secret” upcoming product (around Cloud of course) and because of that I am testing various things. I had never noticed this before but today I wanted to change the size of a disk within vCenter as part of the test procedure. For some weird reason this option was greyed out: I checked if there [...]
I had a discussion with someone around limiting a VM to a specific amount of Mhz’s after I found out that limits where set on most VMs. This environment was a “cloud” environment and the limit was set to create an extra level of fairness. My question of course was doesn’t this impact performance? The answer was simple: No as [...]
I receive a lot of hits on an old article regarding aligning your VMDKs. This article doesn’t actually explain why it is important but only how to do it. The how is not actually as important in my opinion. I do however want to take the opportunity to list some of the options you have today to align your VMs VMDKs. [...]
I just noticed that vSphere has been added to the Windows Server Virtualization Validation Program: source Products that have passed the SVVP requirements for Windows Server 2008 R2 are considered supported on Windows Server 2008, Windows 2000 Server SP4 and Windows Server 2003 SP2 and later Service Packs, both x86 32-bit, and x64 64-bit. Might come in handy when you [...]
One of my customers recently asked if it was possible to change the time-out for a power state change, at the same time this question was asked and answered on an internal mailing list. I thought it would be nice to document it. An example of a power state change task would be the shutdown that is initiated by SRM [...]
Yesterday I posted about the article on the hostd, vpxa and vpxd log file options. Today another KB article has been released to setup a rotation scheme for the VM’s log file: vmware.log. Might be worth checking it out and setting it up. You need to change the VM’s vmx file for this to work though. In short: logging = [...]
