mnh wrote:
Darren J Moffat wrote:
mnh wrote:
Hi,
I was wondering if there is any way to read a ZFS snapshot using
system/zfs lib (ie refer to it as a block device).
I dug through the libzfs source but could not find anything that
could enable me to 'read' the contents of a
snapshot/filesystem.
Why ? What problem are you trying to solve ?
We are trying to implement a third-party Backup/Restore System for zfs
(including bare metal recovery). Essentially requires
the snapshot to be read and stored in a proprietary format.
Is there a reason why you can't just walk through the snapshot using
POSIX APIs ? The snapshot is mounted in
<rootofdataset>/.zfs/snapshot/<nameofsnapshot>
Or maybe zfs send/recv is what you need.
Given that you can't read the filesystem as a block device in the
first place why would it make sense to do so for a snapshot of
filesystem ?
I know it doesn't make much sense, I was just hoping that zfs's
snapshots could be used by a different product/vendor.
Sure they can but I'm not sure you are approaching the problem from a
view that ZFS can give you on the data.
It might help if you described how this backup software works for other
filesystems, eg UFS.
--
Darren J Moffat
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