vmware tools not installed

Is there any risk with vmware tools not being installed on a virtual machine? Can anyone give a low tech management freindly summary of the risks you incur by not installing vmware tools on virtual machines?
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pma111Asked:
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pma111Author Commented:
And also, we have a production network and a HA DR network, I noticed the virtual machines in the DR vcenter/cluster were much worse for not having vmware tools installed, than in the production clusters (just a couple), and I wondered why that may be?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It does not interact with the Host correctly, and it's recommended by VMware it's installed, Mouse and Graphics will work better if installed.

Your administrator has not installed VMware Tools!

See my EE Articles

HOW TO: Install VMware Tools for Windows on a VMware Windows virtual machine on a VMware vSphere Hypervisor 5.1 (ESXi 5.1) Host Server

HOW TO: Tutorial Video - Install VMware Tools for Linux on a VMware Linux virtual machine
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pma111Author Commented:
"It does not interact with the Host correctly"

But its not really much of a risk? Can you provide some worst case scenarios on lack of vmware tools on a machine to help gauge if theres any real risk? Whats the worst that could happen?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Performance, the lack of the host to claim back memory from the VM - Risk.

It should be installed!

Not Installed - Sloppy/Lazy VMware Administration!
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rindiCommented:
It's not a question of risk or no risk, but rather just about things not working as they should, or not working at all.
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pma111Author Commented:
Performance, the lack of the host to claim back memory from the VM - Risk.
Can you elaborate slightly Rindi to a non tech non vmware admin.
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pma111Author Commented:
And also, we have a production network and a HA DR network, I noticed the virtual machines in the DR vcenter/cluster were much worse for not having vmware tools installed, than in the production clusters (just a couple), and I wondered why that may be? Any theories? Is there less need for the DR cluster of machines to have vmware tools installed? If so, why?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
There is technology built into VMware Tools which allows the Host Server to claim unused memory back from the Guest VM, by inflating the "balloon driver".

No VMware Tools, no communication between host and VM.

VMware Tools should be installed on ALL VMware Virtual Tools.

The VMware Tools service could be stopped, or not installed, maybe some GuestOS do not support VMware Tools.
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pma111Author Commented:
Ok thanks, any theory on the lack of vmware tools for guests on the DR hosts? Is there any less of a need to have vmware tools on DR network than a production network?>
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, you have a bunch of lazy VMware Administrators, that have

1. not installed VMware Tools
2. VMware Tools service is not started
3. VMware Tools does not support the OS installed.

VMware Tools should be *INSTALLED* on all VMs if supported!
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rindiCommented:
It's like when you install Windows to a new PC and forget to install the drivers for that PC. Many things won't be available or won't work properly, like the video resolution will be low, the network may not work, you might not have sound etc. VMware tools installs the drivers needed for the virtual hardware, among some additional features, like desktop integration, folder sharing etc.
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