Являюсь автором книги "Администрирование VMware v Sphere". Позиция автора может не совпадать с позицией работодателя.
3) VUM есть такая кнопка - VMware Tools upgrade settings.
VMware Tools also improve the virtual machine’s storage I/O, graphics performance, and allows the virtual machine to synchronize its clock with that of the host.
Virtual machine performance is boosted with VMware Tools by enabling the use of paravirtualized devices such as the VMXNET3 network and paravirtualized SCSI devices.
If you just had a single virtual machine, you would think that answer is perfect and would work every time.
Most of the time, it works fine however, it’s not always that easy.
For those who don’t know, VMware Tools are a suite of utilities that enhance the performance of a virtual machine’s guest operating system and improve management of the virtual machine.
I must admit that it’s a really smart way to surpress the automatic reboot. The “tools” itself is a service that can easily be restarted but that’s clearly not something you would do with a device driver.
In some cases you might not know how to install the tools (perhaps you have a Linux VM and are more familiar with Windows) or perhaps you have a virtual appliance and you don’t have access to install the tools.
As with many scenarios, updating the VMware tools on a single VM might be simple but in the real world, most companies have hundreds or even thousands of virtual machines – making the solution not as simple. Although the guest operating system can run without them, many VMware features are not available until you install VMware Tools.
Memory ballooning is a technique by which a v Sphere host, when it’s running low on physical RAM, can reclaim RAM from guest virtual machines that may not be using the full complement of RAM currently assigned.
Transparent page sharing is a method that allows virtual machines to share memory pages through what is essentially a memory deduplication process.