For our own servers as well as the virtual servers of customers we have tested various settings in Proxmox and have come to the following results:
On our Proxmox server the combination of Write Back (Unsafe) and Discard is the best.
Since all our servers are equipped with a RAID controller, the “(Unsafe)” should not be too big a problem.
Here are the results of our speed tests (Windows VM):
All tests were run 2 times (1 test = cache empty; 2 tests = cache filled).
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