RE: switch logfile vs. archive log current

At what point do you insert the sleep command and how many seconds do you specify?

Why exclude the last archive log?

Thanks,
Peter Schauss
Northrop Grumman Corporation

-----Original Message-----
From: Hemant K Chitale [mailto:hkchital_at_singnet.com.sg] Sent: Wednesday, March 19, 2003 11:49 AM To: Multiple recipients of list ORACLE-L Subject: Re: switch logfile vs. archive log current

A "switch logfile" isn't mandatory and an "archive log current" is highly recommended.
The "switch logfile" command would return immdiately and would not wait for the archiver to complete archiving the log. The "archive log current"
would return only after the archiver has completed it's job. You must backup the archivelogs from the first one generated after the first "alter tablespace begin backup" to the first one after the last "alter tablespace end backup". You are also backing up the controlfile which is also highly recommended.

I normally use a combination of multiple "switch logfile", "archive log" commands and
a Unix "sleep" command and then exclude the last archivelog from the backup just to be safe.
Hemant
At 06:14 AM 19-03-03 -0800, you wrote:
>In my hot backup script, should I be using "alter system archive log
>current;"
>instead of "alter system switch logfile;"?
>
>At present this is what I am doing:
>
>For each tablespace:
>
>sqlplus internal << EOF
>alter tablespace ERGO_USR begin backup;
>exit
>EOF
>#
>cp $DIR3/ERGO_USR.dbf $BACKUP_DIR$DIR3
>#
>sqlplus internal << EOF
>alter tablespace ERGO_USR end backup;
>alter system switch logfile;
>exit
>EOF
>
>For the last tablespace:
>
>sqlplus internal << EOF
>alter tablespace USERS begin backup;
>exit
>EOF
>#
>cp $DIR1/users01.dbf $BACKUP_DIR$DIR1
>#
>sqlplus internal << EOF
>alter tablespace USERS end backup;
>alter database backup controlfile to '$BACKUP_DIR$DIR1/control01.bak';
>alter system switch logfile;
>exit
>EOF
>#
>
>Thanks,
>Peter Schauss
>Northrop Grumman Corporation
>--
>Please see the official ORACLE-L FAQ: http://www.orafaq.net
>--
>Author: Schauss, Peter
> INET: pschauss_at_northropgrumman.com
>
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Hemant K Chitale
My personal web site is : http://hkchital.tripod.com

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Hemant K Chitale
  INET: hkchital_at_singnet.com.sg

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