Alter database switch logfile

Question

Hi friends,
Oracle DB 9i
I am making a standby database backup (hi-brid), and keep updating every hour on top of the hour sked it with the archive logs generated.
I am just confused a little. If I have 3 logfiles, and if I command "alter database switch log files", does the 3 logfiles
be converted to the backup archive logs ? or only one of them only, and I have to issue the command 3x so that I will be able to get all the latest transaction inside the 3 redo logfiles to be applied at the standby server.
Thanks a lot,
Ms Inday

Answer 1

crystal wrote:
oh i see :D , so at any time there is one and only one redo log group that has data? all the other 2 are empty?not empty, but already archived. When an online redo log fills, there is an automatic switch to the next group. As soon as the switch is complete, the archiver will start archiving the group that was just filled. Archiving does not wait until all redo groups are filled.
=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2010.12.17 14:54:47 =~=~=~=~=~=~=~=~=~=~=~=
login as: oracle
oracle@vmlnx01's password:
Last login: Fri Dec 17 14:49:39 2010 from 192.168.160.1
[oracle@vmlnx01 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Fri Dec 17 14:55:08 2010
Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select group#, archived, status from v$log order by 1;
alter system switch logfile;
    GROUP# ARC STATUS
1 YES INACTIVE
2 YES INACTIVE
3 NO  CURRENT
SQL>
System altered.
SQL> select group#, archived, status from v$log order by 1;
alter system switch logfile;
    GROUP# ARC STATUS
1 NO  CURRENT
2 YES INACTIVE
3 YES ACTIVE
SQL>
System altered.
SQL> select group#, archived, status from v$log order by 1;
alter system switch logfile;
    GROUP# ARC STATUS
1 YES ACTIVE
2 NO  CURRENT
3 YES ACTIVE
SQL>
System altered.
SQL> select group#, archived, status from v$log order by 1;
alter system switch logfile;
    GROUP# ARC STATUS
1 YES INACTIVE
2 YES INACTIVE
3 NO  CURRENT
SQL>
System altered.
SQL> select group#, archived, status from v$log order by 1;
alter system switch logfile;
    GROUP# ARC STATUS
1 NO  CURRENT
2 YES INACTIVE
3 YES ACTIVE
SQL>
System altered.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@vmlnx01 ~]$ exit
logout