Server layout: rootfs on USB flash drive or NVMe?

[gpw928]

I said:

I believe that I did. I said "You might want to provision storage to a VM which is not ZFS on the server side". It's all about avoiding COW/COW. ZFS is COW. If your client is COW, then you may want UFS on the server side, and you may want a mirror for redundancy on the server. [You can still have ZFS, and all its advantages, on the client side.]

You said:

Yes, exactly! Note that the point of interest is OUTSIDE your quotation marks
And you had this silent assumption that I knew that COW/COW should be avoided, but I didn't.
Silent assumptions, unspoken agreements, whatever you call it: these beasts are one of the most nasty insidious pitfalls in human communication (and sadly in software development, too).

I had raised the issue of "avoiding COW/COW" in a an earlier post:

I would try place my important VMs on the SSDs. But beware, you don't want both the hypervisor and the VM client using copy-on-write file systems.

 

[atax1a]