As many of you know months ago I moved from VMware Professional Services to the VMware Cloud Practice. A major part of our work revolves around VMware vCloud Director(vCD) so you can imagine that I am glad it has finally been released. This lifts the NDA and as such you can expect a whole bunch of articles in the near [...]
As some of you might now I am not only doing a session at VMworld 2010 but I am also a Lab Captain. We have been working really hard over the last couple of months to get the labs up and running for you guys. Over the last three days it has been chaos here at VMworld. Setting up, testing [...]
Over the last couple of months Frank Denneman and I have been working really hard on a secret project. Although we have spoken about it a couple of times on twitter the topic was never revealed. Months ago I was thinking about what a good topic would be for my next book. As I already wrote a lot of articles [...]
Just noticed a couple of new advanced settings in the vCenter Performance Best Practices whitepaper. das.perHostConcurrentFailoversLimit When multiple VMs are restarted on one host, up to 32 VMs will be powered on concurrently by default. This is to avoid resource contention on the host. This limit can be changed through the HA advanced option: das.perHostConcurrentFailoversLimit. Setting a larger value will [...]
I was reading an excellent article on NetApp metroclusters and vm-host affinity rules Larry Touchette the other day. That article is based on the tech report TR-3788 which covers the full solution but did not include the 4.1 enhancements. The main focus of the article is on VM-Host Affinity Rules. Great stuff and it will “ensure” you will keep your IO [...]
Recently I had a discussion around Layer 2 adjacency for the vMotion(vmkernel interface) network. With that meaning that all vMotion interfaces, aka vmkernel interfaces, are required to be on the same subnet as otherwise vMotion would not function correctly. Now I remember when this used to be part of the VMware documentation but that requirement is nowhere to be found [...]
I was just browsing the vsinodes/procnodes. I noticed the following: Free memory state thresholds { soft:64 pct hard:32 pct low:16 pct } As explained in Frank’s excellent article on memory reservations, ESX/ESXi uses memory states to determine what type of memory reclamation technique to use. Techniques that can be used are TPS, ballooning and swapping. Of course you will always [...]
