Logical standby in noarchive mode

Question

Hello,
does anybody know if it is possible to run a logical standby (10gR2) in noarchivelog mode?
For my understanding it should be possible, why not... But I can't find a piece of documentation which prove this.
Thanks in advance,
Boris...

Answer 1

I also was curious if setting up a Logical Standby in noarchivelog mode was possible. It looks like it is...
We use this simply as a reporting copy of our data. Our analysts do not change any of this data. They just need it to be fairly current (~3 days). At this point, there isn't any need to generate archivelogs so we want to disable the feature to minimize our maintenance and our storage requirements.
STANDBY DB:
SQL> select log_mode, open_mode from v$database;
LOG_MODE     OPEN_MODE
ARCHIVELOG   READ WRITE
SQL> ALTER DATABASE STOP LOGICAL STANDBY APPLY;
Database altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Database mounted.
SQL>  alter database noarchivelog;
Database altered.
SQL> alter database open;
Database altered.
SQL> ALTER DATABASE START LOGICAL STANDBY APPLY IMMEDIATE;
Database altered.Then I created an object on the production server:
SQL> create table testuser.noarchivelog_testing as select * from dba_objects;
Table created.
SQL> alter system switch logfile;
System altered.
Mon Jun 22 11:13:26 2009
Beginning log switch checkpoint up to RBA [0xe6.2.10], SCN: 1031235046
Mon Jun 22 11:13:26 2009Now I see it on the standby:
Mon Jun 22 11:13:43 2009
RFS LogMiner: RFS id [25920] assigned as thread [1] PING handler
RFS[1]: Archived Log: '/oracle/LH1/oraarch/LH1arch_1_229_680639127.arc'
Mon Jun 22 11:13:46 2009
RFS LogMiner: Registered logfile [/oracle/LH1/oraarch/LH1arch_1_229_680639127.arc] to LogMiner session id [1]
Mon Jun 22 11:13:48 2009
LOGSTDBY status: ORA-16204: DDL successfully applied
Mon Jun 22 11:13:51 2009
LOGMINER: End mining logfile: /oracle/LH1/oraarch/LH1arch_1_229_680639127.arc
SQL> select count(*) from testuser.noarchivelog_testing;
  COUNT(*)
     24444