Physical standby, logical standby which one shud i prefer?

Hi ,
how to decide which standby to create that is whether Physical or Logical.
I want to create it for database failover. so which one i shoul prefer?
pls give ur suggestions.
Thanks,
Kuamr.
Message was edited by:
user548258

Physical standby is the easiest to setup and administer and supports all datatypes. You can use it for reporting (if it's rarely req'd), except for you would have to cancel the recovery, open the db is a read-only mode, and then put it back in the recovery mode.
Logical standby is a pain, but you can run reports at anytime without canceling recovery. logical does not support certain datatypes, like IOT's, BLOBs, etc.

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Hi,
I am working on Oracle 10.2.0.3 on Solaris SPARC 64-bit.
I have a Dataguard configuration with a single Physical standby database that uses real time application. We had a major application upgrade yesterday and before the start of upgrade, we cancelled the media recovery and disabled the log_archive_dest_n so that it doesn't ship the archive logs to standby site. We left the dataguard configuration in this mode incase of a rollback.
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Thanks for the reply.
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Edited by: user11971589 on Nov 18, 2010 2:55 PM

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STATUS PID SEQUENCE#
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RFS[3]: Archived Log: '/u02/archive/1_88819_665420030.dbf'
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Waiting for MRP0 pid 29710 to terminate
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Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_29710.trc:
ORA-16037: user requested cancel of managed recovery operation
Sun Apr 18 18:56:51 2010
MRP0: Background Media Recovery process shutdown (rmdp3)
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alter database recover managed standby database disconnect
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ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
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Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
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Clearing online redo logfile 1 /u03/redologs/rmdp3/redo01.log
Clearing online log 1 of thread 1 sequence number 88818
Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-19527: physical standby redo log must be renamed
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
Clearing online redo logfile 1 complete
Media Recovery Waiting for thread 1 sequence 88576
Fetching gap sequence in thread 1, gap sequence 88576-88675
FAL[client]: Error fetching gap sequence, no FAL server specified
Sun Apr 18 18:57:25 2010
Completed: alter database recover managed standby database disconnect
from session
Sun Apr 18 18:57:54 2010
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 88576-88675
DBID 440735188 branch 665420030
FAL[client]: All defined FAL servers have been attempted.
Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization
parameter is defined to a value that is sufficiently large
enough to maintain adequate log switch information to resolve
archivelog gaps.
Edited by: user11982297 on Apr 18, 2010 10:58 AM

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Hi friends,
I configured a physical standby database for my primary database. I am able to switchover successfully to physical standby database. So the roles are now changed. Primary is physucal standby, and physical standby is primary.
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Iam sorry for the delay.... here's the alert log
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Physical standby, logical standby which one shud i prefer?

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