Onbar physical followed by onbar logical...then...ontape ?
Posted in 2005
Topics: Backup & Restore
I have always been taught not to mix onbar and ontape, and have taken
that at face value
And not experimented.
Netbackup server failures has me pondering if it would be possible
To do a onbar -r -p, onbar -r -l n #, followed by ontape logical
recovery
(log tapes put on disk when backup server died).
I called support, and like me they had been trained not to mix, and had
not tried either.
Anyone tried it?
Thanks,
--
Sam
"The generation of random numbers us too important to be left to
chance."
Robert R. Coveyou
Oak Ridge National Laboratory
sending to informix-list
Gentsch, Sam wrote:
> I have always been taught not to mix onbar and ontape, and have taken
> that at face value
> And not experimented.
>
> Netbackup server failures has me pondering if it would be possible
> To do a onbar -r -p, onbar -r -l n #, followed by ontape logical
> recovery
> (log tapes put on disk when backup server died).
>
> I called support, and like me they had been trained not to mix, and had
> not tried either.
>
> Anyone tried it?
>
> Thanks,
>
>
>
> --
> Sam
> "The generation of random numbers us too important to be left to
> chance."
> Robert R. Coveyou
> Oak Ridge National Laboratory
> sending to informix-list
Well, the onbar -r -l -n will try and restore ... and then attempt to
bring the engine to quiescent; so following this with ontape -l will
"probably" not work.
However,
onbar -r -p
onbar -r -l -n "non-existent log number - or 'log number in future' or'duff object id in ixbar.<servernum> file'" MAY leave the engine in fast
recovery and then
ontape -l
might work :D
Obiouvsly, set up a test instance and check it out.
since you were taught not to mix onbar and ontape the, since you
archive using onbar you will have been backing up your logical logs
using onbar as well, I assume this is a purely hypothetical question