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zdb: add extra -T flag to show histograms of BRT refcounts

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Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16692
(cherry picked from commit 673efbbf5d)
This commit is contained in:
Rob Norris
2024-11-02 03:08:33 +11:00
committed by Tony Hutter
parent f237b8e2a4
commit d83cd5307d
2 changed files with 27 additions and 6 deletions
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man/man8/zdb.8
+3 -1
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@@ -14,7 +14,7 @@
.\" Copyright (c) 2017 Lawrence Livermore National Security, LLC.
.\" Copyright (c) 2017 Intel Corporation.
.\"
.Dd November 18, 2023
.Dd October 27, 2024
.Dt ZDB 8
.Os
.
@@ -409,6 +409,8 @@ blocks cloned, the space saving as a result of cloning, and the saving ratio.
.It Fl TT
Display the per-vdev BRT statistics, including total references.
.It Fl TTT
Display histograms of per-vdev BRT refcounts.
.It Fl TTTT
Dump the contents of the block reference tables.
.It Fl u , -uberblock
Display the current uberblock.