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Date:      Tue, 17 Oct 2023 23:33:27 +0100
From:      void <void@f-m.fm>
To:        freebsd-fs@freebsd.org
Subject:   performance impact of various compression schemes on a zvol
Message-ID:  <ZS8Lt5wGKc6vIRrf@int21h>

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What's the perfomance penalty on zvols of compression?
The impact on the host?

I've searched and cannot find figures. I'm not looking for exact numbers,
more rather would zstd-9 or zstd-6 be better, more suited to zvol 
(compression and speed) than lz4, possibly because it's more recent? 
Or would no compression at all be 'best'?

In the example, cpu is E5-2690, ram is 512GB, disks are ssd
(these register as nda0 and nda1, as a zpool striped config)
The zvols are bhyve instances. The host is recent -current.
TIA for any tips. 
-- 



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