Not sure why hardly anyone picked up on this cool youtube movie about Storage IO Control(SIOC), but I figured it was worth posting. SIOC is probably one of the coolest version coming to a vSphere version in the near future. Scott Drummonds wrote a cool article about it which shows the strength of SIOC when it comes to fairness. One [...]
Got asked the following question today and thought it was valuable for everyone to know the answer to this: How is a host selected for VM placement when HA restarts VMs from a failed host? It’s actually a really simple mechanism. HA keeps track of the unreserved capacity of each host of the cluster. When a fail-over needs to occur the hosts [...]
By now the whole world has probably read that vSphere 4 Update 2 has been released. (release notes vCenter, release notes ESX, release notes ESXi ) Some of you might have even started slowly upgrading their test systems. (Like I am doing at the moment…) I will not copy the full release notes but I do want to point out a [...]
On twitter @heiner_hardt asked for help with a performance related issue he was experiencing. As I am starting to appreciate esxtop more every single day and I really start to appreciate solving performance problems I decided to dive in to it. After the initial couple of questions Heiner posted a screenshot: Heiner highlighted (red outline) a couple of metrics which [...]
One of my colleagues today asked me if it was possible to use VLAN ID 4095 for the “management” network of ESXi. This VLAN ID is however reserved for a very specific purpose. This particular VLAN ID is only to be used for “Virtual Guest Tagging” (VGT). It basically means that the VLAN ID is stripped off at the Guest [...]
Yesterday we had an internal discussion about the support of PVSCSI in combination with a 64bit OS. VMware’s documentation currently states the following: Paravirtual SCSI adapters are supported on the following guest operating systems: Windows Server 2008 Windows Server 2003 Red Hat Enterprise Linux (RHEL) 5 source As we normally spell out every single detail this KB article is kind [...]
Two of my colleagues just launched a new website. It is probably one of the few vCenter Orchestrator Blogs out there and definitely worth following. Christophe & I (Burke) have launched a new website at http://www.vcoteam.info that we hope to use to help educate and encourage the adoption of Orchestrator for VMware automation tasks. One of the first articles explains [...]
