RE: Hot Backup Issue

From: Ron Rogers <RROGERS_at_galottery.org>
Date: Tue, 02 Oct 2001 06:28:05 -0700
Message-ID: <F001.0039E905.20011002052027@fatcity.com>

Guy,
 Some reasons why NOT to put all tablespaces in the backup mode at once (step 1) is that the tranactions against the database could create a lot of redo and archive logs that could fill the space, tranaction time could be longer as it now reads the redo not the tables, Snapshot to old could occur, If there is a problem and the server restarts Oracle will not start tablespaces in the backup mode you have to manually issue the "tablespace normal" command.
 Doing each tablespace individually allow you more control over the process. Just a few thoughts.
ROR mª¿ªm

>>> guy.hammond_at_avt.co.uk 10/02/01 07:15AM >>>
Hello,

Slightly unrelated question... is it better to (in pseudo code) :

1)

for each tablespace loop

        put tablespace in backup mode
end loop

for each datafile in the database loop

        copy data file
end loop

for each tablespace loop

        put tablespace in normal mode
end loop

or 2)

for each tablespace loop

        put tablespace in backup mode
        for each datafile in this tablespace loop
                copy data file
        end loop
        put tablespace in normal mode

end loop

What I'm doing is (2), but I notice that Rajesh is doing (1). What are the pros and cons of each approach? (I'll probably use RMAN at some point, anyway :0) ).

Cheers,

g  

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Received on Tue Oct 02 2001 - 08:28:05 CDT