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Full Discussion: Getting data from ZFS.
Homework and Emergencies Emergency UNIX and Linux Support Getting data from ZFS. Post 302656711 by Skrynesaver on Friday 15th of June 2012 09:38:23 AM
Old 06-15-2012
Getting data from ZFS.
Hi all,

A customer has a very active ZFS partitionon their production system, I need to get a copy of the data under one directory at a specific point in time.

Is it possible to do this with the ZFS snapshot/clone tools, (and what commands should be used to capture the info I require for export from their platform)?

The following is my understanding of what I should do, corrections and clarifications are very welcome.
Code:
zfs snapshot $DEVICE@now
cd $MOUNT_POINT
cd .zfs
tar -cvf $HOME/data.tar path/to/directory/of/interest
zfs destroy $DEVICE@now

How wrong am I, do I need to clone the filesystem to access data, if so how...
 

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LEARN ABOUT CENTOS

grub2-fstest

GRUB-FSTEST(3)						     Library Functions Manual						    GRUB-FSTEST(3)

NAME

       grub-fstest -- Debug tool for GRUB's filesystem driver.

SYNOPSIS

       grub-fstest [-c | --diskcount=NUM] [-C | --crypto]
		    [-d | --debug=STRING] [-K | --zfs-key=FILE|prompt]
		    [-n | --length=NUM] [-r | --root=DEVICE_NAME]
		    [-s | --skip=NUM] [-u | --uncompress] [-v | --verbose]
		    IMAGE_PATH <blocklist FILE | cat FILE |
		    cmp FILE LOCAL | cp FILE LOCAL | crc FILE |
		    hex FILE | ls PATH | xnu_uuid DEVICE>

DESCRIPTION

       grub-fstest is a tool for testing GRUB's filesystem drivers.  You should not normally need to run this program.

OPTIONS

       --diskcount=NUM
	      Specify the number of input files.

       --crypto
	      Mount cryptographic devices.

       --debug=STRING
	      Set debug environment variable.

       --zfs-key=FILE|prompt
	      Load ZFS cryptographic key.

       --length=NUM
	      Handle NUM bytes in output file.

       --root=DEVICE_NAME
	      Set root device.

       --skip=NUM
	      Skip NUM bytes from output file.

       --uncompress
	      Uncompress data.

       --verbose
	      Print verbose messages.

COMMANDS

       blocklist FILE
	      Display block list of FILE.

       cat FILE
	      Display FILE on standard output.

       cmp FILE LOCAL
	      Compare FILE with local file LOCAL.

       cp FILE LOCAL
	      Copy FILE to local file LOCAL.

       crc FILE
	      Display the CRC-32 checksum of FILE.

       hex FILE
	      Display contents of FILE in hexidecimal.

       ls PATH
	      List files at PATH.

       xnu_uuid DEVICE
	      Display the XNU UUID of DEVICE.

SEE ALSO

       info grub

								  Wed Feb 26 2014						    GRUB-FSTEST(3)
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