This PowerCLI oneliner will give you quick insight in the capacity of your VMware clusters by showing the oversubscription on CPU’s. The CPU Oversubscription is the ratio between the number of virtual CPU’s (vCpu) allocated to all vm’s in the cluster to the number of physical processor cores of the hosts in the cluster. If […]
Are you still performing old-school in-guest VM backups with a backup agent? Not ready to buy a backup product that does complete VM backups through the vStorage APIs? Then you will need to rebuild all your VM’s with the original configuration before you can start restoring your data. As always: PowerCLI to the rescue! This […]
VMware has announced the next generation of vSphere yesterday. Besides lots of new features, vSphere 5 also comes with a new licensing structure. For every licensed physical CPU, you get a certain amount of vRAM, which you will be able to allocate to virtual machine. Only the running VM’s will count towards your license limit. […]
Using Memory Limits in vmware vSphere can cause severe performance issues. The guest operating system assumes it can use all of the allocated memory, but vSphere will make sure the vm cannot use more than the memory limit. It does this by inflating a memory balloon using the balloon driver included with the vmware tools. […]
Configuring a syslog folder is convenient for troubleshooting ESXi. But it’s a pain you-know-where to configure manually across all your ESXi servers. Luckily, PowerCLI can help out. This script creates a folder on the local datastore and configures ESXi to write the syslog in that folder. Enjoy! Hugo
I used to have all my common functions stored as separate scripts in a single folder. I’d load these through a few lines of code in my profile, looping through the script files and dot-sourcing them. Powershell v2.0 has a new feature called Modules. So how do you convert a bunch of scripts (containing functions) […]
