Date: Mon, 30 Nov 2020 16:00:21 +1100 From: Pascal Guitierrez <pascal.guitierrez@gmail.com> To: freebsd-fs@freebsd.org Subject: Special allocation classes sizing Message-ID: <CAHEFGYbABG0L3q4J2SfjNVcbqjwBEG2N4N%2BJ26Dkt_SyJH6icQ@mail.gmail.com>
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Hi there, We are looking at migrating a rather large existing pool of around 400TB onto a new pool, taking advantage of the special allocation classes in 12.2-RELEASE (just using the default special, not dedup or small_blocks). I am about to procure the hardware needed, however I=E2=80=99m not sure how= big to make the special storage layer. Is there a rough estimate calculation or perhaps I can run zdb on the existing pool to get an estimate? Thanks for your time
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