dataguard之物理standby 日誌切換

物理standby 日常管理

對於最大效能模式（max performance）下，primary、standby庫的啟動順序無先後

1：dataguard啟動順序：先standby，後primary
2：dataguard關閉順序：先primary，後 standby


在standby庫上將例項啟動到mount狀態

[oracle@rac2 admin]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Mar 10 17:09:27 2014

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup nomount;
ORACLE instance started.

Total System Global Area  218103808 bytes
Fixed Size            1218604 bytes
Variable Size           71305172 bytes
Database Buffers      142606336 bytes
Redo Buffers            2973696 bytes
SQL>
SQL> alter database mount standby database;

Database altered.

SQL> alter database recover managed standby database disconnect from session;//啟動redo apply

Database altered.


啟動standby庫的監聽

SQL> !lsnrctl start

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 10-MAR-2014 17:12:55

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting /home/oracle/10.2.0/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /home/oracle/10.2.0/network/admin/listener.ora
Log messages written to /home/oracle/10.2.0/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac2)(PORT=1521)))

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                10-MAR-2014 17:12:56
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /home/oracle/10.2.0/network/admin/listener.ora
Listener Log File         /home/oracle/10.2.0/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac2)(PORT=1521)))
The listener supports no services
The command completed successfully

SQL>
SQL> select open_mode from v$database;

OPEN_MODE
--------------------
READ WRITE

SQL>


在primary庫上啟動例項

[oracle@rac1 admin]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Mar 10 17:15:18 2014

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup;
ORACLE instance started.

Total System Global Area  218103808 bytes
Fixed Size            1218604 bytes
Variable Size           75499476 bytes
Database Buffers      138412032 bytes
Redo Buffers            2973696 bytes
Database mounted.
Database opened.
SQL>

SQL> select open_mode from v$database;

OPEN_MODE
--------------------
MOUNTED


在primary 庫上啟動監聽

[oracle@rac1 admin]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 10-MAR-2014 17:14:58

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting /home/oracle/10.2.0/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /home/oracle/10.2.0/network/admin/listener.ora
Log messages written to /home/oracle/10.2.0/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1521)))

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                10-MAR-2014 17:14:58
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /home/oracle/10.2.0/network/admin/listener.ora
Listener Log File         /home/oracle/10.2.0/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1521)))
The listener supports no services
The command completed successfully



驗證primary庫上的歸檔日誌是否正常傳輸到standby庫

在primary庫上執行

oracle@rac1 archivelog]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Mar 10 17:25:55 2014

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
     2 05-MAR-14    05-MAR-14
     2 05-MAR-14    05-MAR-14
     3 05-MAR-14    05-MAR-14
     3 05-MAR-14    05-MAR-14
     4 05-MAR-14    05-MAR-14
     4 05-MAR-14    05-MAR-14
     5 05-MAR-14    06-MAR-14
     5 05-MAR-14    06-MAR-14
     6 06-MAR-14    06-MAR-14
     6 06-MAR-14    06-MAR-14
     7 06-MAR-14    06-MAR-14

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
     7 06-MAR-14    06-MAR-14
     8 06-MAR-14    06-MAR-14
     8 06-MAR-14    06-MAR-14
     9 06-MAR-14    06-MAR-14
     9 06-MAR-14    06-MAR-14
    10 06-MAR-14    06-MAR-14
    10 06-MAR-14    06-MAR-14
    11 06-MAR-14    06-MAR-14
    11 06-MAR-14    06-MAR-14
    12 06-MAR-14    06-MAR-14
    12 06-MAR-14    06-MAR-14

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
    13 06-MAR-14    06-MAR-14
    13 06-MAR-14    06-MAR-14
    14 06-MAR-14    06-MAR-14
    14 06-MAR-14    06-MAR-14
    15 06-MAR-14    06-MAR-14
    15 06-MAR-14    06-MAR-14
    16 06-MAR-14    06-MAR-14
    16 06-MAR-14    06-MAR-14
    17 06-MAR-14    06-MAR-14
    17 06-MAR-14    06-MAR-14
    18 06-MAR-14    06-MAR-14

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
    18 06-MAR-14    06-MAR-14
    19 06-MAR-14    06-MAR-14
    19 06-MAR-14    06-MAR-14
    20 06-MAR-14    06-MAR-14
    20 06-MAR-14    06-MAR-14
    21 06-MAR-14    10-MAR-14
    21 06-MAR-14    10-MAR-14
    22 10-MAR-14    10-MAR-14
    22 10-MAR-14    10-MAR-14
    23 10-MAR-14    10-MAR-14
    23 10-MAR-14    10-MAR-14

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
    24 10-MAR-14    10-MAR-14
    24 10-MAR-14    10-MAR-14
    25 10-MAR-14    10-MAR-14
    25 10-MAR-14    10-MAR-14

48 rows selected.

SQL>

然後在primary庫上切換日誌

SQL> alter system switch logfile;

System altered.

SQL> /

System altered.

SQL>



在standby庫上執行如下


SQL>  SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
     2 05-MAR-14    05-MAR-14
     3 05-MAR-14    05-MAR-14
     4 05-MAR-14    05-MAR-14
     5 05-MAR-14    06-MAR-14
     6 06-MAR-14    06-MAR-14
     7 06-MAR-14    06-MAR-14
     8 06-MAR-14    06-MAR-14
     9 06-MAR-14    06-MAR-14
    10 06-MAR-14    06-MAR-14
    11 06-MAR-14    06-MAR-14
    12 06-MAR-14    06-MAR-14

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
    13 06-MAR-14    06-MAR-14
    14 06-MAR-14    06-MAR-14
    15 06-MAR-14    06-MAR-14
    16 06-MAR-14    06-MAR-14
    17 06-MAR-14    06-MAR-14
    18 06-MAR-14    06-MAR-14
    19 06-MAR-14    06-MAR-14
    20 06-MAR-14    06-MAR-14
    21 06-MAR-14    10-MAR-14
    22 10-MAR-14    10-MAR-14
    23 10-MAR-14    10-MAR-14

 SEQUENCE# FIRST_TIME    NEXT_TIME
---------- ------------ ------------
    24 10-MAR-14    10-MAR-14
    25 10-MAR-14    10-MAR-14
    26 10-MAR-14    10-MAR-14
    27 10-MAR-14    10-MAR-14
    28 10-MAR-14    10-MAR-14

27 rows selected.

可以看到primary庫上切換新的三組日誌已經傳到standby庫上了
[oracle@rac2 archivelog]$ ls -l
total 924
-rw-r-----  1 oracle dba 918528 Mar 10 17:32 log1_26_841430327.arc
-rw-r-----  1 oracle dba   1024 Mar 10 17:32 log1_27_841430327.arc
-rw-r-----  1 oracle dba  14848 Mar 10 17:32 log1_28_841430327.arc
[oracle@rac2 archivelog]$ pwd
/home/oracle/archivelog
[oracle@rac2 archivelog]$

如果碰到歸檔日誌無法傳輸到standby庫的情況，首先檢查alert.log

然後在 standby庫上先取消 redo apply，然後重新啟動redo apply

SQL>  alter database recover managed standby database cancel;

Database altered.

SQL>  alter database recover managed standby database disconnect from session;

Database altered.

SQL> select max(sequence#) from v$archived_log;

MAX(SEQUENCE#)
--------------
        29