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Persistent L2ARC

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This commit makes the L2ARC persistent across reboots. We implement
a light-weight persistent L2ARC metadata structure that allows L2ARC
contents to be recovered after a reboot. This significantly eases the
impact a reboot has on read performance on systems with large caches.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: George Wilson <gwilson@delphix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Saso Kiselkov <skiselkov@gmail.com>
Co-authored-by: Jorgen Lundman <lundman@lundman.net>
Co-authored-by: George Amanakis <gamanakis@gmail.com>
Ported-by: Yuxuan Shui <yshuiv7@gmail.com>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #925 
Closes #1823 
Closes #2672 
Closes #3744 
Closes #9582
This commit is contained in:
George Amanakis
2020-04-10 13:33:35 -04:00
committed by GitHub
parent 36a6e2335c
commit 77f6826b83
30 changed files with 3020 additions and 88 deletions
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tests/runfiles/linux.run
+6
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@@ -164,3 +164,9 @@ tags = ['functional', 'user_namespace']
tests = ['groupspace_001_pos', 'groupspace_002_pos', 'groupspace_003_pos',
'userquota_013_pos', 'userspace_003_pos']
tags = ['functional', 'userquota']
[tests/functional/persist_l2arc:Linux]
tests = ['persist_l2arc_001_pos', 'persist_l2arc_002_pos',
'persist_l2arc_003_neg', 'persist_l2arc_004_pos', 'persist_l2arc_005_pos',
'persist_l2arc_006_pos', 'persist_l2arc_007_pos', 'persist_l2arc_008_pos']
tags = ['functional', 'persist_l2arc']