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Ned Bass
a3403164d7
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:-1:f
# Dump all file and directory objects
zdb -dd tank/fish 0:-1:fd
# Dump all types except file and directory objects
zdb -dd tank/fish 0:-1: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
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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Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.
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We have a separate document with contribution guidelines.
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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
METAfile contains the officially recognized supported kernel versions.