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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: sandeen@sandeen.net, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Subject: [PATCH 2/8] man: document the xfs_db btheight command
Date: Thu, 23 Jan 2020 16:16:44 -0800	[thread overview]
Message-ID: <157982500443.2765410.17401149852075835578.stgit@magnolia> (raw)
In-Reply-To: <157982499185.2765410.18206322669640988643.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Document the btheight command in xfs_db.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 man/man8/xfs_db.8 |   39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)


diff --git a/man/man8/xfs_db.8 b/man/man8/xfs_db.8
index a1ee3514..53e34983 100644
--- a/man/man8/xfs_db.8
+++ b/man/man8/xfs_db.8
@@ -346,6 +346,45 @@ If the cursor points at an inode, dump the extended attribute block mapping btre
 Dump all keys and pointers in intermediate btree nodes, and all records in leaf btree nodes.
 .RE
 .TP
+.BI "btheight [\-b " blksz "] [\-n " recs "] [\-w " max "|\-w " min "] btree types..."
+For a given number of btree records and a btree type, report the number of
+records and blocks for each level of the btree, and the total number of blocks.
+The btree type must be given after the options.
+
+A raw btree geometry can be provided in the format
+"record_bytes:key_bytes:ptr_bytes:header_type", where header_type is one of
+"short", "long", "shortcrc", or "longcrc".
+
+The supported btree types are:
+.IR bnobt ,
+.IR cntbt ,
+.IR inobt ,
+.IR finobt ,
+.IR bmapbt ,
+.IR refcountbt ,
+and
+.IR rmapbt .
+
+Options are as follows:
+.RS 1.0i
+.TP 0.4i
+.B \-b
+is used to override the btree block size.
+The default is the filesystem block size.
+.TP
+.B \-n
+is used to specify the number of records to store.
+This argument is required.
+.TP
+.B \-w max
+shows only the best case scenario, which is when the btree blocks are
+maximally loaded.
+.TP
+.B \-w min
+shows only the worst case scenario, which is when the btree blocks are
+half full.
+.RE
+.TP
 .B check
 See the
 .B blockget


  parent reply	other threads:[~2020-01-24  0:16 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-24  0:16 [PATCH 0/8] xfsprogs: random fixes Darrick J. Wong
2020-01-24  0:16 ` [PATCH 1/8] man: list xfs_io lsattr inode flag letters Darrick J. Wong
2020-01-25 23:16   ` Christoph Hellwig
2020-01-24  0:16 ` Darrick J. Wong [this message]
2020-01-25 23:16   ` [PATCH 2/8] man: document the xfs_db btheight command Christoph Hellwig
2020-01-24  0:16 ` [PATCH 3/8] man: reformat xfs_quota commands in the manpage for testing Darrick J. Wong
2020-01-25 23:16   ` Christoph Hellwig
2020-01-24  0:16 ` [PATCH 4/8] man: document some missing xfs_db commands Darrick J. Wong
2020-01-25 23:16   ` Christoph Hellwig
2020-01-24  0:17 ` [PATCH 5/8] xfs_db: dump per-AG reservations Darrick J. Wong
2020-01-25 23:17   ` Christoph Hellwig
2020-01-24  0:17 ` [PATCH 6/8] xfs_io: fix copy_file_range length argument overflow Darrick J. Wong
2020-01-25 23:18   ` Christoph Hellwig
2020-01-24  0:17 ` [PATCH 7/8] xfs_io: fix pwrite/pread length truncation on 32-bit systems Darrick J. Wong
2020-01-25 23:18   ` Christoph Hellwig
2020-01-24  0:17 ` [PATCH 8/8] xfs_repair: fix totally broken unit conversion in directory invalidation Darrick J. Wong
2020-01-25 23:19   ` Christoph Hellwig
2020-01-26 22:11     ` Darrick J. Wong
2020-01-30 18:35       ` Eric Sandeen
2020-01-28 15:56 ` [PATCH 9/8] xfs_io: fix integer over/underflow handling in timespec_from_string Darrick J. Wong
2020-01-30 18:18   ` Christoph Hellwig
2020-01-30 18:13 ` [PATCH 10/8] libxfs: remove duplicate attr function declarations Darrick J. Wong
2020-01-30 18:17   ` Christoph Hellwig
2020-01-30 18:28   ` Eric Sandeen
2020-01-30 18:40     ` Darrick J. Wong
2020-01-30 18:48       ` Eric Sandeen
2020-01-30 18:15 ` [PATCH 11/8] xfs_repair: don't corrupt a attr fork da3 node when clearing forw/back Darrick J. Wong
2020-01-30 18:22   ` Christoph Hellwig
2020-01-30 18:31     ` Darrick J. Wong
2020-01-30 18:46   ` [PATCH v2 " Darrick J. Wong
2020-01-31  6:03     ` Christoph Hellwig
2020-02-04 23:14       ` Darrick J. Wong
2020-02-05  6:07         ` Christoph Hellwig

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