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Re: [Networker] Can scanner read Oracle data?
2011-09-04 16:52:59
On 2011-09-03 05:41, bingo wrote:
Hi George,
scanner has 2 capabilities:
- it can extract NW index (database) information and insert it into the
media and/or client file index respectively.
- it can recover files using the appropriate ASM (application specific
module)
However, uasm is the file backup/recovery ASM which is the wrong one for the
online backup of databases. So for recoveries/verifications etc. of a database
you must use the appropriate tool/module. Consequently you received the error.
Just think about NW itself. To backup and recover the media index, it uses a
specific 'module' which is nsrmmdbasm. There is still the nsrindexasm for the
client file index databases which have been created before NW 6.0 - just in
case such old stuff needs to be recovered.
If you really need to verify a backup, cloning is the best method - you verify
the backup and you create a duplicate for additional security. If you already
clone, you already have 2 valid instances of your backup data.
Thanks, Bingo! That's what I suspected, but wanted to corroborate. Your
technical explanation was very helpful. I appreciate your input.
One interesting thing that I noticed is that even though the index save
sets are listed in the media database with names like: index:client, as
opposed to /opt/nsr/index/client (which is where they actually live on
the server), uasm maintains the pathname when recovering them regardless
of whether I redirect the recovered pathname (uasm -m src=dst). So I end
up with a local 'opt/nsr/index/client' and not just client or
'dst/opt/nsr/index/client' if I redirect them. Maybe no surprise, but I
tested recovering an index (again, just for laughs), using scanner with
uasm, a while back, and I could have sworn that it did not recreate that
whole path and instead simply recovered the index as './client'. Hmm ...
Cheers.
George
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