Standby redo log does not exist...

Question

Hello,
Oracle 11.2.0.2, running on Solaris
This is kind of a continuation of a previous thread, but this is a different question:
I have a DG configuration, with the primary database having 2 redo logs per redo log group.
And, it has 2 redo logs for the standby redo log groups.
But I just found out something very strange:
For the standby redo log group, even though the database shows it has two redo log files per group, the second file does not actually exist on the file system.
And, I have no idea where it is, or why the database is not complaining about it.
See below:
SQL> select * from v$logfile;
         GROUP# STATUS    TYPE    MEMBER                                        IS_
             11           STANDBY /opt/oracle/oradata2/PROD/REDO01A_STDBY.log NO
             11           STANDBY /opt/oracle/oradata3/PROD/REDO01B_STDBY.log NO    <== does not exist on file system
             12           STANDBY /opt/oracle/oradata2/PROD/REDO02A_STDBY.log NO
             12           STANDBY /opt/oracle/oradata3/PROD/REDO02B_STDBY.log NO    <== does not exist on file system
             13           STANDBY /opt/oracle/oradata2/PROD/REDO03A_STDBY.log NO
             13           STANDBY /opt/oracle/oradata3/PROD/REDO03B_STDBY.log NO    <== does not exist on file system
             14           STANDBY /opt/oracle/oradata2/PROD/REDO04A_STDBY.log NO
             14           STANDBY /opt/oracle/oradata3/PROD/REDO04B_STDBY.log NO    <== does not exist on file system
             15           STANDBY /opt/oracle/oradata2/PROD/REDO05A_STDBY.log NO
             15           STANDBY /opt/oracle/oradata3/PROD/REDO05B_STDBY.log NO    <== does not exist on file system
              5           ONLINE  /opt/oracle/oradata1/PROD/REDO05A.log       NO
              5           ONLINE  /opt/oracle/oradata2/PROD/REDO05B.log       NO
              6           ONLINE  /opt/oracle/oradata1/PROD/REDO06A.log       NO
              6           ONLINE  /opt/oracle/oradata2/PROD/REDO06B.log       NO
              7           ONLINE  /opt/oracle/oradata1/PROD/REDO07A.log       NO
              7           ONLINE  /opt/oracle/oradata2/PROD/REDO07B.log       NO
              8           ONLINE  /opt/oracle/oradata1/PROD/REDO08A.log       NO
              8           ONLINE  /opt/oracle/oradata2/PROD/REDO08B.log       NO
18 rows selected.
Notice below that the "B" redo logs do not exist.
SQL> !ls -l /opt/oracle/oradata3/PROD/REDO01B_STDBY.log
/opt/oracle/oradata3/PROD/REDO01B_STDBY.log: No such file or directory
SQL> !ls -l /opt/oracle/oradata3/PROD/REDO02B_STDBY.log
/opt/oracle/oradata3/PROD/REDO02B_STDBY.log: No such file or directory
SQL> !ls -l /opt/oracle/oradata3/PROD/REDO03B_STDBY.log
/opt/oracle/oradata3/PROD/REDO03B_STDBY.log: No such file or directory
SQL> !ls -l /opt/oracle/oradata3/PROD/REDO04B_STDBY.log
/opt/oracle/oradata3/PROD/REDO04B_STDBY.log: No such file or directory
SQL> !ls -l /opt/oracle/oradata3/PROD/REDO05B_STDBY.log
/opt/oracle/oradata3/PROD/REDO05B_STDBY.log: No such file or directory
But here, you can see that the "A" redo logs actually do exist.
SQL> !ls -l /opt/oracle/oradata2/PROD/REDO01A_STDBY.log
-rw-r-----   1 oracle   dba      536871424 Jan  7  2011 /opt/oracle/oradata2/PROD/REDO01A_STDBY.log

Answer 1

Hello;
I'm able to recreate
SQL> select * from v$logfile;
    GROUP# STATUS  TYPE    MEMBER                                             IS_
         3         ONLINE  /u01/app/oracle/flash_recovery_area/RECOVER2/onlin YES
                           elog/o1_mf_3_8gtxxrl6_.log
         2         ONLINE  /u01/app/oracle/flash_recovery_area/RECOVER2/onlin YES
                           elog/o1_mf_2_8gtxxr4f_.log
         1         ONLINE  /u01/app/oracle/flash_recovery_area/RECOVER2/onlin YES
                           elog/o1_mf_1_8gtxxqng_.log
         4         STANDBY /u01/app/oracle/oradata/RECOVER2/redo04.log        NO
         5         STANDBY /u01/app/oracle/oradata/RECOVER2/redo05.log        NO
         6         STANDBY /u01/app/oracle/oradata/RECOVER2/redo06.log        NOAnd then
SQL> !ls -al /u01/app/oracle/oradata/RECOVER2/redo04.log
ls: /u01/app/oracle/oradata/RECOVER2/redo04.log: No such file or directoryChecking... *Not there, but Oracle ( 11.2.0.3 ) allows clean up without barking. Had only one member so I did GROUP drop.
SQL> ALTER DATABASE DROP LOGFILE GROUP 4;
Database altered.
SQL> select * from v$logfile;
    GROUP# STATUS  TYPE    MEMBER                                             IS_
         3         ONLINE  /u01/app/oracle/flash_recovery_area/RECOVER2/onlin YES
                           elog/o1_mf_3_8gtxxrl6_.log
         2         ONLINE  /u01/app/oracle/flash_recovery_area/RECOVER2/onlin YES
                           elog/o1_mf_2_8gtxxr4f_.log
         1         ONLINE  /u01/app/oracle/flash_recovery_area/RECOVER2/onlin YES
                           elog/o1_mf_1_8gtxxqng_.log
         5         STANDBY /u01/app/oracle/oradata/RECOVER2/redo05.log        NO
         6         STANDBY /u01/app/oracle/oradata/RECOVER2/redo06.log        NO
SQL> Best Regards
mseberg