I love blogging because of the discussions you some times get into. One of the bloggers I highly respect and closely follow is EMC’s vSpecialist Scott Drummonds (former VMware Performance Guru). Scott posted a question on his blog about what the size of a cluster should be. Scott discussed this with Dave Korsunksy and Dan Anderson, both VMware employee, and [...]

It is one of those days again… It is time to blog about something different than VMware, virtualization, cloud or storage… Music. Over the last couple of months there are a couple of songs which I just can’t stop listening to. The first song is Parade Of the Dead by the almighty Black Label Society. I realize that many of [...]

I was just cleaning up our Cloud Lab and noticed HA wasn’t enabled. I enabled it and immediately it threw the following error at me: Error Message: Configuration Issues – HA agent on esx4.mgm.local in cluster ams-hadrs-01 in Lab2 has an error : Error while running health check script. When experiencing HA configuration issues there are a couple of steps [...]

At VMworld I met up with the guys presenting the Storage I/O Control session, Irfan Ahmad and Chethan Kumar. As many of you hopefully know Irfan has always been active in the social media space (virtualscoop.org). Chethan however is “new” and just started his own blog. Chethan is a Senior Member of the Performance Engineering team  At VMware. He focuses [...]

It seems that a lot of vendors are starting to update their firmware to enable virtualized workloads from the vStorage APIs for Array Integration, also known as VAAI. Not only the vendors are starting to show interest, also the bloggers are picking up on it. Hence the reason I wanted to reiterate some of the excellent details out there and [...]

I was reading some threads on the VMTN forum and noticed a question on an advanced HA setting called “das.slotMemInMB”. The setting is briefly mentioned in my deep-dive, but after re-reading the section I think I could have been more clear in describing what is does, how it works and when to use it. Of course anything that goes for [...]

As most of you know mini-VMworld, euuuh I mean the Dutch VMUG, is coming up pretty soon. I will be actively part of two sessions, one will be together with Willem van Engeland and we will be talking about vCloud Director. The other one is a Question and Answer session on VMware HA and VMware DRS together with Frank Denneman. [...]