Torrey McMahon <tmcmah...@yahoo.com> wrote:
> On 1/30/2011 5:26 PM, Joerg Schilling wrote:
> > Richard Elling<richard.ell...@gmail.com> wrote:
> >
> >> ufsdump is the problem, not ufsrestore. If you ufsdump an active
> >> file system, there is no guarantee you can ufsrestore it. The only way
> >> to guarantee this is to keep the file system quiesced during the entire
> >> ufsdump. Needless to say, this renders ufsdump useless for backup
> >> when the file system also needs to accommodate writes.
> > This is why there is a ufs snapshot utility.
>
> You'll have the same problem. fssnap_ufs(1M) write locks the file system
> when you run the lock command. See the notes section of the man page.
>
> http://download.oracle.com/docs/cd/E19253-01/816-5166/6mbb1kq1p/index.html#Notes
The time the write lock is active is from a few seconds to a few minutes.
If you like do backup the system root filesystem, you may need to stop
logging/auditing for that time or split the mirror.
Once the snapshot is established, you may take as much time as your storage for
the snapshot will last.
Jörg
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