RE: ZFS snapshots

You would still be recommended to run
ALTER TABLESPACE (DATABASE in 10g) BEGIN BACKUP .. before you take the Snapshot
and
ALTER TABLESPACE (DATABASE) END BACKUP followed by ALTER SYSTEM ARCHIVE LOG CURRENT after the Snapshot.

Hemant

At 10:58 PM Tuesday, Donahue, Adam wrote:
>Well, a ZFS snapshot is atomic - meaning, it's not like copying a
>datafile in that it doesn't read things block-by-block, meaning the
>file can change underneath you while you copy it. Instead, because
>of the way ZFS works, it merely marks an existing "uberblock" to be
>preserved, which is a single, atomic state of the filesystem as of a
>given time.
>
>I admit it's not clean - even if it works. But I'm curious if I'm
>missing something that would make it not work at all in some cases.
>
>Adam

Hemant K Chitale
http://web.singnet.com.sg/~hkchital

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