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Ned Bass a3403164d7 zdb: add support for object ranges for zdb -d 
Allow a range of object identifiers to dump with -d. This may
be useful when dumping a large dataset and you want to break
it up into multiple phases, or to resume where a previous scan
left off. Object type selection flags are supported to reduce
the performance overhead of verbosely dumping unwanted objects,
and to reduce the amount of post-processing work needed to
filter out unwanted objects from zdb output.

This change extends existing syntax in a backward-compatible
way. That is, the base case of a range is to specify a single
object identifier to dump. Ranges and object identifiers can
be intermixed as command line parameters.

Usage synopsis:

    Object ranges take the form <start>:<end>[:<flags>]
        start    Starting object number
        end      Ending object number, or -1 for no upper bound
        flags    Optional flags to select object types:
         A    All objects (this is the default)
         d    ZFS directories
         f    ZFS files
         m    SPA space maps
         z    ZAPs
         -    Negate effect of next flag

Examples:

 # Dump all file objects
 zdb -dd tank/fish 0👎f

 # Dump all file and directory objects
 zdb -dd tank/fish 0👎fd

 # Dump all types except file and directory objects
 zdb -dd tank/fish 0👎A-f-d

 # Dump object IDs in a specific range
 zdb -dd tank/fish 1000:2000

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Reviewed-by: Paul Zuchowski <pzuchowski@datto.com>
Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes #9832
2020-01-24 11:00:46 -08:00
.github Improve Pull Request guidelines 2019-12-30 09:24:41 -08:00
cmd zdb: add support for object ranges for zdb -d 2020-01-24 11:00:46 -08:00
config Unify target_cpu handling 2020-01-17 12:40:09 -08:00
contrib zfs-load-key.sh: ${ZFS} is not the zfs binary 2019-12-29 11:25:00 -08:00
etc Order zfs-import-*.service after multipathd 2020-01-22 12:45:25 -08:00
include Add AltiVec RAID-Z 2020-01-23 11:01:24 -08:00
lib Add AltiVec RAID-Z 2020-01-23 11:01:24 -08:00
man zdb: add support for object ranges for zdb -d 2020-01-24 11:00:46 -08:00
module dsl_bookmark_create_check: fix NULL pointer deref if dbca_errors == NULL 2020-01-23 21:13:42 -08:00
rpm Change http://zfsonlinux.org links to https://zfsonlinux.org 2020-01-13 16:43:59 -08:00
scripts scripts/zfs-test.sh: example for -t 2020-01-23 21:11:05 -08:00
tests zdb: add support for object ranges for zdb -d 2020-01-24 11:00:46 -08:00
udev Create symbolic links in /dev/disk/by-vdev for nvme disk devices 2019-12-17 17:50:20 -08:00
.gitignore Adapt gitignore for modules 2019-12-02 13:23:47 -08:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
.travis.yml Add .travis.yml 2017-11-13 09:18:18 -08:00
AUTHORS Update build system and packaging 2018-05-29 16:00:33 -07:00
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -07:00
configure.ac Tests for btree implementation used by range trees 2019-12-19 11:53:54 -08:00
copy-builtin Change http://zfsonlinux.org links to https://zfsonlinux.org 2020-01-13 16:43:59 -08:00
COPYRIGHT OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
META Update maximum kernel version to 5.4 2019-12-23 14:24:36 -08:00
NEWS Add NEWS file 2018-09-18 12:03:47 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Change http://zfsonlinux.org links to https://zfsonlinux.org 2020-01-13 16:43:59 -08:00
TEST Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.md

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ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

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Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

Release

ZFS on Linux is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported kernel versions.