"Dedup special class"?
On 6 July 2019 16:24:27 Richard Elling <[email protected]>
wrote:
On Jul 5, 2019, at 9:11 PM, Stilez <[email protected]> wrote:
I'm one of many end-users with highly dedupable pools held back by DDT and
spacemap RW inefficiencies. There's been discussion and presentations -
Matt Ahrens' talk at BSDCan 2016 ("Dedup doesn't have to suck") was
especially useful, and allocation classes from the ZoL/ZoF work will allow
metadata-specific offload to SSD. But briad discussion of this general area
is not on the roadmap atm, probably bc so much else is a priority and seems
nobody's stepped up.
In part because dedup will always be slower than non-dedup while the cost
of storage continues to plummet (flash SSDs down 40% in the past year and
there is currently an oversupply of NAND). A good starting point for
experiments is to use the dedup special class and report back to the
community how well it works for you.
-- richard
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