Shulou(Shulou.com)06/01 Report--

Environmental simulation:

Main library:

SQL > select DATABASE_ROLE,open_mode from vested database share database-PRIMARY READ WRITE

Prepare the library:

SQL > select DATABASE_ROLE,open_mode from vested database share database-PHYSICAL STANDBY READ ONLY WITH APPLY

two。 The main database interrupts the log transmission, the standby database stops the log application, and then the main database updates the data.

SQL > ALTER SYSTEM SET log_archive_dest_state_2='reset' SCOPE=BOTH;System altered.

As you can see in the alert log, the log is no longer transferred to the slave database:

ALTER SYSTEM SET log_archive_dest_state_2='reset' SCOPE=BOTH Wed Oct 21 10:41:05 2015Thread 1 advanced to log sequence 355 (LGWR switch) Current log# 1 seq# 355 mem# 0: + DATA/phub/onlinelog/group_1.262.890480943 Current log# 1 seq# 355 mem# 1: + DATA/phub/onlinelog/group_1.263.890480945Wed Oct 21 10:41:05 2015Archived Log entry 707 added for thread 1 sequence 354 ID 0x1fffdaed dest 1:Thread 1 cannot allocate new log Sequence 356Checkpoint not complete Current log# 1 seq# 355 mem# 0: + DATA/phub/onlinelog/group_1.262.890480943 Current log# 1 seq# 355 mem# 1: + DATA/phub/onlinelog/group_1.263.890480945Thread 1 advanced to log sequence 356 (LGWR switch) Current log# 2 seq# 356 mem# 0: + DATA/phub/onlinelog/group_2.264.890480945 Current log# 2 seq# 356 mem# 1: + DATA/phub/onlinelog/group_2.265.890480945Wed Oct 21 10:41:06 2015Archived Log Entry 708 added for thread 1 sequence 355 ID 0x1fffdaed dest 1:

Prepare the database to stop log application:

SQL > ALTER DATABASE recover managed standby DATABASE cancel;Database altered.SQL > select open_mode from vested database ONLY open model read ONLY

Test data:

Main library

SQL > conn scott/scott;Connected.SQL > select count (*) from test; COUNT (*)-87065

Prepare the library:

SQL > select count (*) from test

COUNT (*)

-

87065

The main library updates the test table data:

SQL > delete from test where rownum update test set owner='SCOTT' where object_id insert into test select * from test;86066 rows created.SQL > commit;Commit complete.SQL > alter system switch logfile;System altered.SQL > / System altered.SQL > / System altered.

Delete the latest archive log:

ASMCMD [+ data/PHUB/ARCHIVELOG/2015_10_21] > rm-rf thread_1_seq_359.544.893674539ASMCMD [+ data/PHUB/ARCHIVELOG/2015_10_21] > rm-rf thread_1_seq_358.543.893674457ASMCMD [+ data/PHUB/ARCHIVELOG/2015_10_21] > rm-rf thread_1_seq_357.542.893674453ASMCMD [+ data/PHUB/ARCHIVELOG/2015_10_21] >

Enable the main library log transfer:

SQL > ALTER system SET log_archive_dest_state_2 = 'enable'

System altered.

Enable standby log application:

SQL > conn / as sysdbaConnected.SQL > ALTER DATABASE recover managed standby DATABASE disconnect FROM SESSION;Database altered.

View the slave alert log:

[oracle@dg trace] $tail-f alert_MECBS.log

Serial Media Recovery started

Managed Standby Recovery not using Real Time Apply

Waiting for all non-current ORLs to be archived...

All non-current ORLs have been archived.

Completed: ALTER DATABASE recover managed standby DATABASE disconnect FROM SESSION

Media Recovery Log + DATA/mecbs/archivelog/2015_10_21/thread_1_seq_354.606.893674715

Media Recovery Log + DATA/mecbs/archivelog/2015_10_21/thread_1_seq_355.607.893674715

Media Recovery Log + DATA/mecbs/archivelog/2015_10_21/thread_1_seq_356.605.893674715

Media Recovery Waiting for thread 1 sequence 357

Fetching gap sequence in thread 1, gap sequence 357-359

Wed Oct 21 11:01:34 2015

FAL [client]: Failed to request gap sequence

GAP-thread 1 sequence 357-359

DBID 536511065 branch 890484819

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's sufficiently large

Enough to maintain adequate log switch information to resolve

Archivelog gaps.

Solution:

Query the main database scn:

SQL > SELECT SEQUENCE#,FIRST_CHANGE#,NEXT_CHANGE# FROM v$archived_log WHERE SEQUENCE# > 356 ORDER BY 1; SEQUENCE# FIRST_CHANGE# NEXT_CHANGE#- 357 5501419 5501424 358 5501424 5501430 359 5501430 5501524 36055015245501782360 55015245501782

2) perform rman incremental backup according to scn

RMAN > backup device type disk incremental from scn 5501419 database format'/ home/oracle/data_%U.bak' Starting backup at 21-OCT-15using target database control file instead of recovery catalogallocated channel: ORA_DISK_1channel ORA_DISK_1: SID=400 device type=DISKallocated channel: ORA_DISK_2channel ORA_DISK_2: SID=613 device type=DISKchannel ORA_DISK_1: starting full datafile backup setchannel ORA_DISK_1: specifying datafile (s) in backup setinput datafile file number=00006 name=+DATA/phub/datafile/llc01.dbfinput datafile file number=00003 name=+DATA/phub/datafile/undotbs1.260.891340857input datafile file number=00004 name=+DATA/phub/datafile/users.269.891340843channel ORA_DISK_1: starting Piece 1 at 21-OCT-15channel ORA_DISK_2: starting full datafile backup setchannel ORA_DISK_2: specifying datafile (s) in backup setinput datafile file number=00002 name=+DATA/phub/datafile/sysaux.272.891340857input datafile file number=00007 name=+DATA/phub/datafile/idx01.dbfinput datafile file number=00001 name=+DATA/phub/datafile/system.271.891340857input datafile file number=00005 name=+DATA/phub/datafile/example.287.891340843channel ORA_DISK_2: starting piece 1 at 21-OCT-15channel ORA_DISK_1: finished piece 1 at 21-OCT-15piece handle=/home / oracle/data_5lqk8pt4_1_1.bak tag=TAG20151021T111028 comment=NONEchannel ORA_DISK_1: backup set complete Elapsed time: 00:01:06channel ORA_DISK_1: starting full datafile backup setchannel ORA_DISK_1: specifying datafile (s) in backup setchannel ORA_DISK_2: finished piece 1 at 21-OCT-15piece handle=/home/oracle/data_5mqk8pt4_1_1.bak tag=TAG20151021T111028 comment=NONEchannel ORA_DISK_2: backup set complete Elapsed time: 00:01:05including current control file in backup setchannel ORA_DISK_1: starting piece 1 at 21-OCT-15channel ORA_DISK_1: finished piece 1 at 21-OCT-15piece handle=/home/oracle/data_5nqk8pv6_1_1.bak tag=TAG20151021T111028 comment=NONEchannel ORA_DISK_1: backup set complete, elapsed time: 00:00:01Finished backup at 21-OCT-15

Upload backup files to the standby database:

[oracle@cwogg ~] $scp data_5* 172.16.30.228:/home/oracle/oracle@172.16.30.228's password: data_5lqk8pt4_1_1.bak 100% 1248KB 1.2MB/s 00:00 data_5mqk8pt4_1_1.bak 100% 7128KB 7.0MB/s 00:00 data_5nqk8pv6_1_1.bak 100% 10MB 10.2MB/s 00:00

Perform recover on the repository:

SQL > ALTER DATABASE recover managed standby DATABASE cancel;Database altered

[oracle@dg ~] $rman target /

Recovery Manager: Release 11.2.0.4.0-Production on Wed Oct 21 11:19:03 2015

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

Connected to target database: PHUB (DBID=536511065)

RMAN > catalog start with'/ home/oracle/backup/'

Using target database control file instead of recovery catalog

Searching for all files that match the pattern / home/oracle/backup/

List of Files Unknown to the Database

= =

File Name: / home/oracle/backup/data_5lqk8pt4_1_1.bak

File Name: / home/oracle/backup/data_5mqk8pt4_1_1.bak

File Name: / home/oracle/backup/data_5nqk8pv6_1_1.bak

Do you really want to catalog the above files (enter YES or NO)? Yes

Cataloging files...

Cataloging done

List of Cataloged Files

=

File Name: / home/oracle/backup/data_5lqk8pt4_1_1.bak

File Name: / home/oracle/backup/data_5mqk8pt4_1_1.bak

File Name: / home/oracle/backup/data_5nqk8pv6_1_1.bak

Restore the standby library:

[oracle@dg ~] $sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Oct 21 11:22:44 2015

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0-64bit Production

With the Partitioning, Automatic Storage Management, OLAP, Data Mining

And Real Application Testing options

SQL > shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL > startup mount

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size 2257840 bytes

Variable Size 541068368 bytes

Database Buffers 289406976 bytes

Redo Buffers 2371584 bytes

Database mounted.

SQL > exit

Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0-64bit Production

With the Partitioning, Automatic Storage Management, OLAP, Data Mining

And Real Application Testing options

[oracle@dg ~] $rman target /

Recovery Manager: Release 11.2.0.4.0-Production on Wed Oct 21 11:23:39 2015

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

Connected to target database: PHUB (DBID=536511065, not open)

RMAN > recover database noredo

Starting recover at 21-OCT-15

Using target database control file instead of recovery catalog

Allocated channel: ORA_DISK_1

Channel ORA_DISK_1: SID=36 device type=DISK

Allocated channel: ORA_DISK_2

Channel ORA_DISK_2: SID=37 device type=DISK

Channel ORA_DISK_1: starting incremental datafile backup set restore

Channel ORA_DISK_1: specifying datafile (s) to restore from backup set

Destination for restore of datafile 00001: + DATA/mecbs/datafile/system.259.891103927

Destination for restore of datafile 00002: + DATA/mecbs/datafile/sysaux.260.891104071

Destination for restore of datafile 00005: + DATA/mecbs/datafile/example.261.891104187

Destination for restore of datafile 00007: + DATA/mecbs/datafile/idx.410.891688925

Channel ORA_DISK_1: reading from backup piece / home/oracle/backup/data_5mqk8pt4_1_1.bak

Channel ORA_DISK_2: starting incremental datafile backup set restore

Channel ORA_DISK_2: specifying datafile (s) to restore from backup set

Destination for restore of datafile 00003: + DATA/mecbs/datafile/undotbs1.262.891104243

Destination for restore of datafile 00004: + DATA/mecbs/datafile/users.263.891104267

Destination for restore of datafile 00006: + DATA/mecbs/datafile/llc.258.891103925

Channel ORA_DISK_2: reading from backup piece / home/oracle/backup/data_5lqk8pt4_1_1.bak

Channel ORA_DISK_1: piece handle=/home/oracle/backup/data_5mqk8pt4_1_1.bak tag=TAG20151021T111028

Channel ORA_DISK_1: restored backup piece 1

Channel ORA_DISK_1: restore complete, elapsed time: 00:00:03

Channel ORA_DISK_2: piece handle=/home/oracle/backup/data_5lqk8pt4_1_1.bak tag=TAG20151021T111028

Channel ORA_DISK_2: restored backup piece 1

Channel ORA_DISK_2: restore complete, elapsed time: 00:00:03

Finished recover at 21-OCT-15

View the slave alert log:

Wed Oct 21 11:23:45 2015

Incremental restore complete of datafile 3 + DATA/mecbs/datafile/undotbs1.262.891104243

Checkpoint is 5502788

Last deallocation scn is 1354205

Wed Oct 21 11:23:45 2015

Incremental restore complete of datafile 5 + DATA/mecbs/datafile/example.261.891104187

Checkpoint is 5502790

Last deallocation scn is 1114995

Incremental restore complete of datafile 4 + DATA/mecbs/datafile/users.263.891104267

Checkpoint is 5502788

Last deallocation scn is 3

Incremental restore complete of datafile 1 + DATA/mecbs/datafile/system.259.891103927

Checkpoint is 5502790

Last deallocation scn is 1095967

Incremental restore complete of datafile 6 + DATA/mecbs/datafile/llc.258.891103925

Checkpoint is 5502788

Last deallocation scn is 1099825

Incremental restore complete of datafile 7 + DATA/mecbs/datafile/idx.410.891688925

Checkpoint is 5502790

Incremental restore complete of datafile 2 + DATA/mecbs/datafile/sysaux.260.891104071

Checkpoint is 5502790

Last deallocation scn is 994406

Open the log application:

SQL > ALTER DATABASE recover managed standby DATABASE disconnect FROM SESSION

Database altered.

Master database switch log:

SQL > ALTER system switch logfile;System altered.SQL > / System altered.SQL > SELECT MAX (al.SEQUENCE#) "Last Seq Recieved", MAX (lh.SEQUENCE#) "Last Seq Applied" FROM v$archived_log al, v$log_history lh; Last Seq Recieved Last Seq Applied--363 363

Prepare the library:

SQL > SELECT MAX (al.SEQUENCE#) "Last Seq Recieved", MAX (lh.SEQUENCE#) "Last Seq Applied" FROM v$archived_log al, v$log_history lh

Last Seq Recieved Last Seq Applied

--

363 356

At this point, the slave database still displays gap:

Completed: ALTER DATABASE recover managed standby DATABASE disconnect FROM SESSIONMedia Recovery Waiting for thread 1 sequence 357Fetching gap sequence in thread 1 Gap sequence 357-359Wed Oct 21 11:27:29 2015RFS [1]: Selected log 4 for thread 1 sequence 363dbid 536511065 branch 890484819Wed Oct 21 11:27:29 2015Archived Log entry 333 added for thread 1 sequence 362ID 0x1fffdaed dest 1:Wed Oct 21 11:27:49 2015RFS [1]: Selected log 5 for thread 1 sequence 364dbid 536511065 branch 890484819Wed Oct 21 11:27:49 2015Archived Log entry 334 added for thread 1 sequence 363ID 0x1fffdaed dest 1:Wed Oct 21 11:27:52 2015FAL [client]: Failed to request gap sequence GAP-thread 1 Sequence 357-359 DBID 536511065 branch 890484819FAL [client]: All defined FAL servers have been attempted.---Check that the CONTROL_FILE_RECORD_KEEP_TIME initializationparameter is defined to a value that's sufficiently largeenough to maintain adequate log switch information to resolvearchivelog gaps.-

Stop preparing the database log application and restart it

Both sides of the data and synchronized:

SQL > archive log list

Database log mode Archive Mode

Automatic archival Enabled

Archive destination + DATA

Oldest online log sequence 365

Next log sequence to archive 0

Current log sequence 367

SQL > archive log list

Database log mode Archive Mode

Automatic archival Enabled

Archive destination + DATA

Oldest online log sequence 365

Next log sequence to archive 367

Current log sequence 367

However, the slave alertlog still reported an error: the three archive files could not be found:

FAL [client]: Failed to request gap sequence

GAP-thread 1 sequence 357-359

DBID 536511065 branch 890484819

FAL [client]: All defined FAL servers have been attempted.

Rebuild the control file of the repository:

SQL > ALTER DATABASE CREATE standby controlfile AS'/ tmp/standby.ctl'; Database altered. [oracle@cwogg tmp] $scp standby.ctl 172.16.30.228:/home/oracle/oracle@172.16.30.228's password: standby.ctl 100% 10MB 10.1MB/s 00:00

[oracle@dg ~] $sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Oct 21 11:40:43 2015

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to an idle instance.

SQL > startup nomount

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size 2257840 bytes

Variable Size 541068368 bytes

Database Buffers 289406976 bytes

Redo Buffers 2371584 bytes

RMAN > restore controlfile from'/ home/oracle/standby.ctl'

Starting restore at 21-OCT-15

Using target database control file instead of recovery catalog

Allocated channel: ORA_DISK_1

Channel ORA_DISK_1: SID=24 device type=DISK

Channel ORA_DISK_1: copied control file copy

Output file name=+DATA/mecbs/controlfile/control01.ctl

Output file name=+DATA/mecbs/controlfile/control02.ctl

Finished restore at 21-OCT-15

RMAN > startup mount

Database is already started

Database mounted

Released channel: ORA_DISK_1

To be continued

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.