Host SSD cache - how much required

recently installed ESXi (free) to use domestic test/study. ESXi starts on the USB.

I have 2 SSD for storage, a 1 to for VMS and a 64 GB for the cache host.

How does the host cache requires? I ask because I would like to use a part of the disk cache host to a dir on it to store ISOs of the OS I want to install on the 1 TB drive and test.

ESXi host does not host any-cache. The power of virtual machines. How many? Depends on how much you commit too host-RAM. If you do not commit too much RAM, you need not the host cache. And if you book all the vRAM to virtual machines, you do not have same virtual machine swap file (with vRAM booking 100% it will not be created).

In the worst case (when commit you too much RAM, no work of sharing/compression/balooning and all virtual machines all use the vRAM you assigned to them) you may need to host-cache of size SSD:

'summary_of_vRAM_assigned_to_all_VMs' - 'host_RAM_available_for_VMs '.

But if your host-cache SSD is smaller, it will be used anyway. And when it is full, 'normal' permutation will be used (with VM paging files).

Tags: VMware

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