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ZFS snapshots

From: Donahue, Adam <>
Date: Tue, 12 Dec 2006 09:18:08 -0500
Message-ID: <>


Sanity check question for those familiar with ZFS.

Is there any reason, assuming all datafiles were on a single ZFS filesystem (which is the level of consistent snapshot granularity), that something like the following wouldn't work to copy a database (and refresh on a regular basis) -

	zfs snapshot data_at_n
	zfs snapshot log_at_n
	zfs send -i data_at_n-1 data_at_tag | rsh target zfs receive data
	zfs send -i log_at_n-1 data_at_tag | rsh target zfs receive log
	zfs clone data_at_n data-qa
	zfs clone log_at_n log-qa 

Given the granularity of writes to the redo logs, I'm trying to think of how corruption might be introduced here, if it could. From what I see above, though, it would be more-or-less like a straight-forward database crash - which would on the target side would be recovered automatically during instance startup.


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Received on Tue Dec 12 2006 - 08:18:08 CST

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