Sara Hartse 37f03da8ba Fast Clone Deletion ... Deleting a clone requires finding blocks are clone-only, not shared with the snapshot. This was done by traversing the entire block tree which results in a large performance penalty for sparsely written clones. This is new method keeps track of clone blocks when they are modified in a "Livelist" so that, when it’s time to delete, the clone-specific blocks are already at hand. We see performance improvements because now deletion work is proportional to the number of clone-modified blocks, not the size of the original dataset. Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com> Signed-off-by: Sara Hartse <sara.hartse@delphix.com> Closes #8416		2019-07-26 10:54:14 -07:00
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callbacks	ZTS: change $(cat) to $(<) for speedup	2018-10-31 12:00:06 -05:00
cmd	Add missing .gitignore from "Implement Redacted Send/Receive"	2019-06-23 11:51:29 -07:00
include	Fast Clone Deletion	2019-07-26 10:54:14 -07:00
tests	Fast Clone Deletion	2019-07-26 10:54:14 -07:00
Makefile.am	OpenZFS 7503 - zfs-test should tail ::zfs_dbgmsg on test failure	2017-04-12 13:36:48 -07:00