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physical standby in Max. Protection mode

physical standby in Max. Protection mode

2005-06-06       - By Paul Baumgartel

I have just set up (10g) physical standby in Maximum Protection mode,
with real-time apply of redo from primary.  Everything appears to be
working, but I've noticed a couple of things that I wasn't expecting:

1.  In the online log directories of the standby (where the standby
redo logs live), there are additional online log files.  The redo logs
on the primary are Oracle-managed.  These new logfiles on the standby
have OMF-type names.  They are not the same as those on the primary.=20
The alert log on the standby contains a number of entries such as
this:

Clearing online redo logfile 2 E:\ORADATA\STGSBY\ONLINELOG\O1_MF_2_13PNMM3F=
_.LOG
Clearing online log 2 of thread 1 sequence number 375
Mon Jun 06 11:07:19 2005
Errors in file e:\oracle\admin\stgsby\bdump\stgsby_mrp0_1052.trc:
ORA-00313 (See ORA-00313.ora-code.com): open failed for members of log group 2 of thread 1
ORA-00312 (See ORA-00312.ora-code.com): online log 2 thread 1:
'F:\ORADATA\STGSBY\ONLINELOG\O1_MF_2_13PNMO5V_.LOG'
ORA-27041 (See ORA-27041.ora-code.com): unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
ORA-00312 (See ORA-00312.ora-code.com): online log 2 thread 1:
'E:\ORADATA\STGSBY\ONLINELOG\O1_MF_2_13PNMM3F_.LOG'
ORA-27041 (See ORA-27041.ora-code.com): unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.

There are also messages such as
Deleted Oracle managed file E:\ORADATA\STGSBY\ONLINELOG\O1_MF_3_13PNN2N0_.L=
OG
Deleted Oracle managed file F:\ORADATA\STGSBY\ONLINELOG\O1_MF_3_13PNN4RW_.L=
OG
Created Oracle managed file E:\ORADATA\STGSBY\ONLINELOG\O1_MF_3_1B8SOJVC_.L=
OG
Created Oracle managed file F:\ORADATA\STGSBY\ONLINELOG\O1_MF_3_1B8SOOY8_.L=
OG


What's going on here?

2.  Various trace files on the standby contain entries regarding the
standby redo logs:

Mon Jun 06 14:39:56 2005
Errors in file e:\oracle\admin\stgsby\bdump\stgsby_arc1_820.trc:
ORA-00322 (See ORA-00322.ora-code.com): log 5 of thread 1 is not current copy
ORA-00312 (See ORA-00312.ora-code.com): online log 5 thread 1: 'F:\ORADATA\STGSBY\ONLINELOG\LOG02.RDO'


Despite all of this, the logs are being received, archived, and
applied.  Any insights from those who have BT, DT appreciated!

--=20
Paul Baumgartel
paul.baumgartel@(protected)
--
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