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Andriy Gapon f4902c2a07 9691 fat zap should prefetch when iterating

illumos/illumos-gate@52abb70e07
52abb70e07

https://www.illumos.org/issues/9691
  When iterating over a ZAP object, we're almost always certain to
  iterate over the entire object. If there are multiple leaf blocks, we
  can realize a performance win by issuing reads for all the leaf blocks
  in parallel when the iteration begins.
  For example, if we have 10,000 snapshots, "zfs destroy -nv
  pool/fs@1%9999" can take 30 minutes when the cache is cold. This
  change provides a >3x performance improvement, by issuing the reads
  for all ~64 blocks of each ZAP object in parallel.

Author: Matthew Ahrens <mahrens@delphix.com>

2019-10-16 07:02:02 +00:00

cmd

9485 Optimize possible split block search space

2019-10-16 06:40:47 +00:00

common

8423 8199 7432 Implement large_dnode pool feature

2019-08-12 12:05:40 +00:00

head

5066 remove support for non-ANSI compilation

2014-08-20 06:29:42 +00:00

lib

9559 zfs diff handles files on delete queue in fromsnap poorly