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62e7d3c89e
This change adds a new `zpool prefetch -t ddt $pool` command which causes a pool's DDT to be loaded into the ARC. The primary goal is to remove the need to "warm" a pool's cache before deduplication stops slowing write performance. It may also provide a way to reload portions of a DDT if they have been flushed due to inactivity. Sponsored-by: iXsystems, Inc. Sponsored-by: Catalogics, Inc. Sponsored-by: Klara, Inc. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Allan Jude <allan@klarasystems.com> Signed-off-by: Will Andrews <will.andrews@klarasystems.com> Signed-off-by: Fred Weigel <fred.weigel@klarasystems.com> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Signed-off-by: Don Brady <don.brady@klarasystems.com> Co-authored-by: Will Andrews <will.andrews@klarasystems.com> Co-authored-by: Don Brady <don.brady@klarasystems.com> Closes #15890 |
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