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Add zdb -r <dataset> <object-id | file> <output>

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While you can use zdb -R poolname vdev:offset:[<lsize>/]<psize>[:flags] 
to extract individual DVAs from a vdev, it would be handy for be able 
copy an entire file out of the pool.

Given a file or object number, add support to copy the contents to a 
file. Useful for debugging and recovery.

Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Closes #11027
This commit is contained in:
Allan Jude
2021-01-28 00:36:01 -05:00
committed by GitHub
parent b2c5904a78
commit 393e69241e
7 changed files with 240 additions and 15 deletions
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tests/runfiles/common.run
+1 -1
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@@ -119,7 +119,7 @@ tests = ['zdb_002_pos', 'zdb_003_pos', 'zdb_004_pos', 'zdb_005_pos',
'zdb_006_pos', 'zdb_args_neg', 'zdb_args_pos',
'zdb_block_size_histogram', 'zdb_checksum', 'zdb_decompress',
'zdb_display_block', 'zdb_object_range_neg', 'zdb_object_range_pos',
'zdb_objset_id', 'zdb_decompress_zstd']
'zdb_objset_id', 'zdb_decompress_zstd', 'zdb_recover', 'zdb_recover_2']
pre =
post =
tags = ['functional', 'cli_root', 'zdb']