Oracle 12c Physical Standby Database Creation using Rman  

 

Prerequisites for standby built for primary side.

  • Ø  Configure network files for both side (Primary,standby).
  • Ø  Parameter change in primary side.
  • Ø  Copy the Password file from primary side to standby side.
  • Ø  Create  Pfile on Standby Database.
  • Ø  Using  Rman create standby database using Active duplication.
  • Ø  Enable MRP process.
  • Ø  Post checks.
Details Primary Side  Standby Side
Server Name Primary Standby
DB Name Warangal Mumbai
IP Adresses 192.168.182.128 192.168.182.129

 Prerequisites for standby built for primary side.

  • Change Archive Log

SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Current log sequence 4

SQL> shut immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 2835349504 bytes

Database Buffers        2097152000 bytes

Redo Buffers                 13848576 bytes

Database mounted.

Database opened.

SQL> alter database archivelog;
Database altered.

SQL> alter database open;
Database altered

SQL> archive log list

Database log mode            Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

  • Enable force logging.

SQL> select force_logging from v$database;

FORCE_LOGGING

—————————————

NO

SQL> alter database force logging;

Database altered.

SQL> select force_logging from v$database;

FORCE_LOGGING

—————————————

YES

  • Adding  Standby Redolog Files

SQL> select member from v$logfile;—-add standby redolog files

MEMBER

——————————————————————————–

/u01/app/oracle/oradata/warangal/redo03.log

/u01/app/oracle/oradata/warangal/redo02.log

/u01/app/oracle/oradata/warangal/redo01.log

alter database add standby logfile group 4 ‘/u01/app/oracle/oradata/warangal/redo4.log’  size 50m;

alter database add standby logfile group 5 ‘/u01/app/oracle/oradata/warangal/redo5.log’  size 50m;

alter database add standby logfile group 6 ‘/u01/app/oracle/oradata/warangal/redo6.log’  size 50m;

alter database add standby logfile group 7 ‘/u01/app/oracle/oradata/warangal/redo7.log’ size 50m;

select * from v$standby_log;

SQL> select member from v$logfile;

MEMBER

——————————————————————————–

/u01/app/oracle/oradata/warangal/redo03.log

/u01/app/oracle/oradata/warangal/redo02.log

/u01/app/oracle/oradata/warangal/redo01.log

/u01/app/oracle/oradata/warangal/redo4.log

/u01/app/oracle/oradata/warangal/redo5.log

/u01/app/oracle/oradata/warangal/redo6.log

/u01/app/oracle/oradata/warangal/redo7.log

Configure network files for both side (Primary,standby).

  • Listener entry in Primary and Standby

[oracle@ranesh admin]$ cat listener.ora

# listener.ora Network Configuration File: /u01/app/oracle/product/12.1.0/dbhome_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = TCP)(HOST = ranesh.doyensys.com)(PORT = 1521))

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

    )

  )

SID_LIST_LISTENER =

    (SID_DESC =

    (GLOBAL_DBNAME = warangal)

    (ORACLE_HOME = /u01/app/oracle/product/12.1.0/dbhome_1)

    (SID_NAME = warangal)

)

(SID_DESC=

(GLOBAL_DBNAME = mumbai)

(ORACLE_HOME = /u01/app/oracle/product/12.1.0/dbhome_2)

(SID_NAME = mumbai)

)

)

ADR_BASE_LISTENER=/u01/app/oracle

  • Tnsname Entry in Primary and Standby

[oracle@ranesh admin]$ cat tnsnames.ora

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/12.1.0/dbhome_1/network/admin/tnsnames.ora

warangal =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = ranesh.doyensys.com)(PORT = 1521))

    (CONNECT_DATA=

     (SERVER=DEDICATED)

      (SERVICE_NAME = warangal)

    )

  )

mumbai =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = ranesh2.doyensys.com)(PORT = 1521))

    (CONNECT_DATA=

     (SERVER=DEDICATED)

      (SERVICE_NAME = mumbai)

    )

  )

  • Testing at both Primary and Standby.

[oracle@ranesh dbs]$ tnsping warangal

TNS Ping Utility for Linux: Version 12.1.0.2.0 – Production on 22-JAN-2020 23:40:35

Copyright (c) 1997, 2014, Oracle.  All rights reserved.

Used parameter files:

/u01/app/oracle/product/12.1.0/dbhome_1/network/admin/sqlnet.ora

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ranesh.doyensys.com)(PORT = 1521)) (CONNECT_DATA= (SERVER=DEDICATED) (SERVICE_NAME = warangal)))

OK (10 msec)

[oracle@ranesh dbs]$ tnsping mumbai

TNS Ping Utility for Linux: Version 12.1.0.2.0 – Production on 22-JAN-2020 23:40:45

Copyright (c) 1997, 2014, Oracle.  All rights reserved.

Used parameter files:

/u01/app/oracle/product/12.1.0/dbhome_1/network/admin/sqlnet.ora

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ranesh2.doyensys.com)(PORT = 1521)) (CONNECT_DATA= (SERVER=DEDICATED) (SERVICE_NAME = mumbai)))

OK (0 msec)

Changing Parameters at Primary Side

ALTER SYSTEM SET db_unique_name=’warangal’ SCOPE=SPFILE;

ALTER SYSTEM SET log_archive_config=’dg_config=(warangal,mumbai)’ SCOPE=SPFILE;

ALTER SYSTEM SET log_archive_dest_1=’location=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=warangal’ SCOPE=SPFILE;

ALTER SYSTEM SET log_archive_dest_2=’service=mumbai async valid_for=(online_logfiles,primary_role) db_unique_name=mumbai’ SCOPE=SPFILE;

ALTER SYSTEM SET fal_server=’mumbai’ SCOPE=SPFILE;

ALTER SYSTEM SET fal_client=’warangal’ SCOPE=SPFILE;

ALTER SYSTEM SET standby_file_management=’AUTO’ SCOPE=SPFILE;

ALTER SYSTEM SET db_file_name_convert=’/u01/app/oracle/oradata/warangal’,’/u01/app/oracle/oradata/mumbai’ SCOPE=SPFILE;

Output.

*.db_name=’warangal’

*.db_unique_name=’warangal’

*.fal_client=’warangal’

*.fal_server=’mumbai’

*.log_archive_config=’dg_config=(warangal,mumbai)’

*.log_archive_dest_1=’location=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=warangal’

*.log_archive_dest_2=’service=mumbai async valid_for=(online_logfiles,primary_role) db_unique_name=mumbai’

*.standby_file_management=’AUTO’

*.db_file_name_convert=’/u01/app/oracle/oradata/warangal’,’/u01/app/oracle/oradata/mumbai’

*.db_recovery_file_dest=’/u01/app/oracle/fast_recovery_area’

*.db_recovery_file_dest_size=4560m

Ø Copying Password file from Primary database to Standby

[oracle@ranesh dbs]$ scp orapwwarangal  oracle@192.168.182.129:/u01/app/oracle/product/12.1.0/dbhome_2/dbs

At standby we need to change the password file name

[oracle@ranesh2 dbs]$ ls

hc_hyd21.dat   hc_TEST.dat      init.ora          orapwmumbai  pfile.ora         spfileTEST.ora

 Create pfile in standby and start it in nomount.

[oracle@ranesh2 dbs]$ mkdir initwarangal

[oracle@ranesh2 dbs]$ cat initwarangal.ora

DB_NAME=Warangal

  • Create directory Structure in Standby database

[oracle@ranesh2 dbs]$ cd /u01/app/oracle/admin/

[oracle@ranesh2 warangal]$  mkdir adump pfile dpdump

[oracle@ranesh2 warangal]$ ls

adump  dpdump  pfile  xdb_wallet

[oracle@ranesh2 mumbai]$ pwd

/u01/app/oracle/oradata/mumbai

[oracle@ranesh2 mumbai]$ mkdir -p /u01/app/oracle/oradata/mumbai/onlinelog

[oracle@ranesh2 mumbai]$ mkdir -p /u01/app/oracle/oradata/mumbai/datafile

  • start the standby database using pfile

[oracle@ranesh2 mumbai]$ export ORACLE_SID=Mumbai——-Standby

[oracle@ranesh2 mumbai]$ echo $ORACLE_SID

Mumbai

[oracle@ranesh2 dbs]$ sqlplus / as sysdba

SQL> startup pfile=’initwarangal.ora’ nomount

ORACLE instance started.

Total System Global Area 2835349504 bytes

Database Buffers        2097152000 bytes

Redo Buffers                 13848576 bytes

[oracle@ranesh2 dbs]$ export ORACLE_SID=Warangal———-Primary

[oracle@ranesh2 dbs]$ echo $ORACLE_SID

warangal

[oracle@ranesh2 dbs]$ mkdir /u01/app/oracle/fast_recovery_dest

 Using Rman create standby database using Active duplication.

[oracle@ranesh2 dbs]$ rman target sys/oracle@warangal

Recovery Manager: Release 12.1.0.2.0 – Production on Wed Jan 22 12:11:22 2020

Copyright (c) 1982, 2014, Oracle and/or its affiliates.  All rights reserved.

connected to target database: WARANGAL (DBID=4024448274)

RMAN> connect auxiliary sys/oracle@mumbai

connected to auxiliary database: WARANGAL (not mounted)

RMAN> run

{

allocate channel p1 type disk;

allocate channel p2 type disk;

allocate channel p3 type disk;

allocate channel p4 type disk;

allocate auxiliary channel s1 type disk;

duplicate target database for standby from active database

spfile

parameter_value_convert ‘warangal’,’mumbai’

set db_name=’warangal’

set db_unique_name=’mumbai’

set db_file_name_convert=’/u01/app/oracle/oradata/warangal’,’/u01/app/oracle/oradata/mumbai’

set log_file_name_convert=’/u01/app/oracle/oradata/warangal’,’/u01/app/oracle/oradata/mumbai’

set control_files=’/u01/app/oracle/oradata/mumbai/standby1.ctl’

set log_archive_max_processes=’5′

set fal_client=’mumbai’

set fal_server=’warangal’

set DIAGNOSTIC_DEST=’/u01/app/oracle’

set standby_file_management=’AUTO’

set log_archive_config=’dg_config=(warangal,mumbai)’

set compatible=’12.1.0.2.0′

set sga_target=’1500m’

nofilenamecheck;

}

OUTPUT

using target database control file instead of recovery catalog

allocated channel: p1

channel p1: SID=46 device type=DISK

allocated channel: p2

channel p2: SID=58 device type=DISK

allocated channel: p3

channel p3: SID=45 device type=DISK

allocated channel: p4

channel p4: SID=54 device type=DISK

allocated channel: s1

channel s1: SID=22 device type=DISK

Starting Duplicate Db at 22-JAN-20

contents of Memory Script:

{

   backup as copy reuse

   targetfile  ‘/u01/app/oracle/product/12.1.0/dbhome_1/dbs/orapwwarangal’ auxiliary format

 ‘/u01/app/oracle/product/12.1.0/dbhome_2/dbs/orapwmumbai’   targetfile

 ‘/u01/app/oracle/product/12.1.0/dbhome_1/dbs/spfilewarangal.ora’ auxiliary format

 ‘/u01/app/oracle/product/12.1.0/dbhome_2/dbs/spfilemumbai.ora’   ;

   sql clone “alter system set spfile= ”/u01/app/oracle/product/12.1.0/dbhome_2/dbs/spfilemumbai.ora””;

}

executing Memory Script

Starting backup at 22-JAN-20

Finished backup at 22-JAN-20

sql statement: alter system set spfile= ”/u01/app/oracle/product/12.1.0/dbhome_2/dbs/spfilemumbai.ora”

contents of Memory Script:

{

   sql clone “alter system set  audit_file_dest =

 ”/u01/app/oracle/admin/mumbai/adump” comment=

 ”” scope=spfile”;

   sql clone “alter system set  dispatchers =

 ”(PROTOCOL=TCP) (SERVICE=mumbaiXDB)” comment=

 ”” scope=spfile”;

   sql clone “alter system set  log_archive_dest_1 =

 ”location=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=mumbai” comment=

 ”” scope=spfile”;

   sql clone “alter system set  db_name =

 ”warangal” comment=

 ”” scope=spfile”;

   sql clone “alter system set  db_unique_name =

 ”mumbai” comment=

 ”” scope=spfile”;

   sql clone “alter system set  db_file_name_convert =

 ”/u01/app/oracle/oradata/warangal”, ”/u01/app/oracle/oradata/mumbai” comment=

 ”” scope=spfile”;

   sql clone “alter system set  log_file_name_convert =

 ”/u01/app/oracle/oradata/warangal”, ”/u01/app/oracle/oradata/mumbai” comment=

 ”” scope=spfile”;

   sql clone “alter system set  control_files =

 ”/u01/app/oracle/oradata/mumbai/standby1.ctl” comment=

 ”” scope=spfile”;

   sql clone “alter system set  log_archive_max_processes =

 5 comment=

 ”” scope=spfile”;

   sql clone “alter system set  fal_client =

 ”mumbai” comment=

 ”” scope=spfile”;

   sql clone “alter system set  fal_server =

 ”warangal” comment=

 ”” scope=spfile”;

   sql clone “alter system set  DIAGNOSTIC_DEST =

 ”/u01/app/oracle” comment=

 ”” scope=spfile”;

   sql clone “alter system set  standby_file_management =

 ”AUTO” comment=

 ”” scope=spfile”;

   sql clone “alter system set  log_archive_config =

 ”dg_config=(warangal,mumbai)” comment=

 ”” scope=spfile”;

   sql clone “alter system set  compatible =

 ”12.1.0.2.0” comment=

 ”” scope=spfile”;

   sql clone “alter system set  sga_target =

 1500m comment=

 ”” scope=spfile”;

   shutdown clone immediate;

   startup clone nomount;

}

executing Memory Script

sql statement: alter system set  audit_file_dest =  ”/u01/app/oracle/admin/mumbai/adump” comment= ”” scope=spfile

sql statement: alter system set  dispatchers =  ”(PROTOCOL=TCP) (SERVICE=mumbaiXDB)” comment= ”” scope=spfile

sql statement: alter system set  log_archive_dest_1 =  ”location=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=mumbai” comment= ”” scope=spfile

sql statement: alter system set  db_name =  ”warangal” comment= ”” scope=spfile

sql statement: alter system set  db_unique_name =  ”mumbai” comment= ”” scope=spfile

sql statement: alter system set  db_file_name_convert =  ”/u01/app/oracle/oradata/warangal”, ”/u01/app/oracle/oradata/mumbai” comment= ”” scope=spfile

sql statement: alter system set  log_file_name_convert =  ”/u01/app/oracle/oradata/warangal”, ”/u01/app/oracle/oradata/mumbai” comment= ”” scope=spfile

sql statement: alter system set  control_files =  ”/u01/app/oracle/oradata/mumbai/standby1.ctl” comment= ”” scope=spfile

sql statement: alter system set  log_archive_max_processes =  5 comment= ”” scope=spfile

sql statement: alter system set  fal_client =  ”mumbai” comment= ”” scope=spfile

sql statement: alter system set  fal_server =  ”warangal” comment= ”” scope=spfile

sql statement: alter system set  DIAGNOSTIC_DEST =  ”/u01/app/oracle” comment= ”” scope=spfile

sql statement: alter system set  standby_file_management =  ”AUTO” comment= ”” scope=spfile

sql statement: alter system set  log_archive_config =  ”dg_config=(warangal,mumbai)” comment= ”” scope=spfile

sql statement: alter system set  compatible =  ”12.1.0.2.0” comment= ”” scope=spfile

sql statement: alter system set  sga_target =  1500m comment= ”” scope=spfile

Oracle instance shut down

connected to auxiliary database (not started)

Oracle instance started

Total System Global Area    1577058304 bytes

Fixed Size                     2924832 bytes

Variable Size                503320288 bytes

Database Buffers            1056964608 bytes

Redo Buffers                  13848576 bytes

allocated channel: s1

channel s1: SID=22 device type=DISK

contents of Memory Script:

{

   backup as copy current controlfile for standby auxiliary format  ‘/u01/app/oracle/oradata/mumbai/standby1.ctl’;

}

executing Memory Script

Starting backup at 22-JAN-20

channel p1: starting datafile copy

copying standby control file

output file name=/u01/app/oracle/product/12.1.0/dbhome_1/dbs/snapcf_warangal.f tag=TAG20200123T002240

channel p1: datafile copy complete, elapsed time: 00:00:03

Finished backup at 22-JAN-20

contents of Memory Script:

{

   sql clone ‘alter database mount standby database’;

}

executing Memory Script

sql statement: alter database mount standby database

contents of Memory Script:

{

   set newname for tempfile  1 to

 “/u01/app/oracle/oradata/mumbai/temp01.dbf”;

   switch clone tempfile all;

   set newname for datafile  1 to

 “/u01/app/oracle/oradata/mumbai/system01.dbf”;

   set newname for datafile  2 to

 “/u01/app/oracle/oradata/ramya.dbf”;

   set newname for datafile  3 to

 “/u01/app/oracle/oradata/mumbai/sysaux01.dbf”;

   set newname for datafile  4 to

 “/u01/app/oracle/oradata/mumbai/undotbs01.dbf”;

   set newname for datafile  5 to

 “/u01/app/oracle/oradata/ranesh.dbf”;

   set newname for datafile  6 to

 “/u01/app/oracle/oradata/mumbai/users01.dbf”;

   backup as copy reuse

   datafile  1 auxiliary format

 “/u01/app/oracle/oradata/mumbai/system01.dbf”   datafile

 2 auxiliary format

 “/u01/app/oracle/oradata/ramya.dbf”   datafile

 3 auxiliary format

 “/u01/app/oracle/oradata/mumbai/sysaux01.dbf”   datafile

 4 auxiliary format

 “/u01/app/oracle/oradata/mumbai/undotbs01.dbf”   datafile

 5 auxiliary format

 “/u01/app/oracle/oradata/ranesh.dbf”   datafile

 6 auxiliary format

 “/u01/app/oracle/oradata/mumbai/users01.dbf”   ;

   sql ‘alter system archive log current’;

}

executing Memory Script

executing command: SET NEWNAME

renamed tempfile 1 to /u01/app/oracle/oradata/mumbai/temp01.dbf in control file

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting backup at 22-JAN-20

channel p1: starting datafile copy

input datafile file number=00001 name=/u01/app/oracle/oradata/warangal/system01.dbf

channel p2: starting datafile copy

input datafile file number=00003 name=/u01/app/oracle/oradata/warangal/sysaux01.dbf

channel p3: starting datafile copy

input datafile file number=00004 name=/u01/app/oracle/oradata/warangal/undotbs01.dbf

channel p4: starting datafile copy

input datafile file number=00005 name=/u01/app/oracle/oradata/ranesh.dbf

output file name=/u01/app/oracle/oradata/ranesh.dbf tag=TAG20200123T002251

channel p4: datafile copy complete, elapsed time: 00:00:08

channel p4: starting datafile copy

input datafile file number=00006 name=/u01/app/oracle/oradata/warangal/users01.dbf

output file name=/u01/app/oracle/oradata/mumbai/undotbs01.dbf tag=TAG20200123T002251

channel p3: datafile copy complete, elapsed time: 00:00:09

channel p3: starting datafile copy

input datafile file number=00002 name=/u01/app/oracle/oradata/ramya.dbf

output file name=/u01/app/oracle/oradata/ramya.dbf tag=TAG20200123T002251

channel p3: datafile copy complete, elapsed time: 00:00:03

output file name=/u01/app/oracle/oradata/mumbai/users01.dbf tag=TAG20200123T002251

channel p4: datafile copy complete, elapsed time: 00:00:04

output file name=/u01/app/oracle/oradata/mumbai/system01.dbf tag=TAG20200123T002251

channel p1: datafile copy complete, elapsed time: 00:02:34

output file name=/u01/app/oracle/oradata/mumbai/sysaux01.dbf tag=TAG20200123T002251

channel p2: datafile copy complete, elapsed time: 00:02:34

Finished backup at 22-JAN-20

sql statement: alter system archive log current

contents of Memory Script:

{

   switch clone datafile all;

}

executing Memory Script

datafile 1 switched to datafile copy

input datafile copy RECID=1 STAMP=1030364527 file name=/u01/app/oracle/oradata/mumbai/system01.dbf

datafile 2 switched to datafile copy

input datafile copy RECID=2 STAMP=1030364527 file name=/u01/app/oracle/oradata/ramya.dbf

datafile 3 switched to datafile copy

input datafile copy RECID=3 STAMP=1030364527 file name=/u01/app/oracle/oradata/mumbai/sysaux01.dbf

datafile 4 switched to datafile copy

input datafile copy RECID=4 STAMP=1030364527 file name=/u01/app/oracle/oradata/mumbai/undotbs01.dbf

datafile 5 switched to datafile copy

input datafile copy RECID=5 STAMP=1030364527 file name=/u01/app/oracle/oradata/ranesh.dbf

datafile 6 switched to datafile copy

input datafile copy RECID=6 STAMP=1030364527 file name=/u01/app/oracle/oradata/mumbai/users01.dbf

Finished Duplicate Db at 22-JAN-20

released channel: p1

released channel: p2

released channel: p3

released channel: p4

released channel: s1

[oracle@ranesh2 dbs]$ export ORACLE_SID=mumbai

[oracle@ranesh2 dbs]$ !sq

sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Wed Jan 22 12:23:42 2020

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 – 64bit Production

With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> alter database open;

Database altered.

SQL> alter database recover managed standby database using current logfile disconnect;

Database altered.

SQL> Alter database recover managed standby database cancel;

Database altered.

  • Primary Database

SQL> alter system set log_archive_dest_state_2=defer;

System altered.

SQL> alter system set log_archive_dest_state_2=enable;

System altered.

TO SEE IN STANDBY ARCHIVE LOG FILES APPLIED SUCCESSFUL OR NOT

SELECT ARCH.THREAD# “Thread”, ARCH.SEQUENCE# “Last Sequence Received”, APPL.SEQUENCE# “Last Sequence Applied”, (ARCH.SEQUENCE# – APPL.SEQUENCE#) “Difference”

FROM

(SELECT THREAD# ,SEQUENCE# FROM V$ARCHIVED_LOG WHERE (THREAD#,FIRST_TIME ) IN (SELECT THREAD#,MAX(FIRST_TIME) FROM V$ARCHIVED_LOG GROUP BY THREAD#)) ARCH,

(SELECT THREAD# ,SEQUENCE# FROM V$LOG_HISTORY WHERE (THREAD#,FIRST_TIME ) IN (SELECT THREAD#,MAX(FIRST_TIME) FROM V$LOG_HISTORY GROUP BY THREAD#)) APPL

WHERE

ARCH.THREAD# = APPL.THREAD#

ORDER BY 1;

o/p

    Thread Last Sequence Received Last Sequence Applied Difference

———- ———————- ——————— ———-

             1                            18                  18    0

             1                            18                  18    0

Standy  checking present scn

select thread#,sequence#,first_time,next_time,applied from v$archived_log where applied=’YES’;

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