Oracle 12C DataGuard部署以及维护

Oracle 12C DataGuard部署

• 一、环境部署
• 二、维护使用
  • 2.1 检查主备库的归档日志号
  • 2.2 检查备库的归档日志同步情况以及应用指标参数
  • 2.3 查看主备库的模式
  • 2.4 主备库归档日志维护
  • 2.5 备库磁盘空间不足处理
  • 2.6 重建备库
• 三、取消DataGuard环境
  • 3.1 Standby Database Alone
  • 3.2 主库脱离DataGuard

12c的Dataguard部署过程还是与11g类似，可以按照11g的部署方法进行部署。

一、环境部署

	Primary	Standby
DB Version	12.1.0.2	12.1.0.2
Hostname	primary	standby
HOST IP	172.16.4.51	172.16.4.52
DB_NAME	orcl	orcl
DB_UNIQUE_NAME	orcl	stdorcl
Instance_Name	orcl	stdorcl
DB Listener	1521	1521
DB Storage	FileSystem	FileSystem
DB files	/u01/app/oracle/oradata/orcl/	/u01/app/oracle/oradata/stdorcl/
LOG files	/u01/app/oracle/oradata/orcl/	/u01/app/oracle/oradata/stdorcl/
ORACLE_HOME	/u01/app/oracle/product/12.1.0/db_1/	/u01/app/oracle/product/12.1.0/db_1/
OS	CentOS 7.5	CentOS 7.5

1、hosts信息
主库以及备库：
172.16.4.51 primary
172.16.4.52 standby

2、在主库增加standby redologfile文件(如果redo log有N组，standby redo log则需要N+1组。)

主库查询确认组数

SQL> select group#,thread#,members,status from v$log;GROUP#    THREAD#    MEMBERS STATUS
---------- ---------- ---------- ----------------1          1          1 INACTIVE2          1          1 CURRENT3          2          1 INACTIVE4          2          1 CURRENT

增加standbylogfile：

alter database add standby logfile  group 5 '/u01/app/oracle/oradata/orcl/stdredo1.log' size 50m;
alter database add standby logfile  group 6 '/u01/app/oracle/oradata/orcl/stdredo2.log' size 50m;
alter database add standby logfile  group 7 '/u01/app/oracle/oradata/orcl/stdredo3.log' size 50m;
alter database add standby logfile  group 8 '/u01/app/oracle/oradata/orcl/stdredo4.log' size 50m;

3、在备库oracle用户创建归档目录，数据目录并设置权限
oracle用户

mkdir -p /u01/app/oracle/diag/orcl
mkdir -p /u01/app/oracle/oradata/stdorcl/
mkdir -p /u01/arch
mkdir -p /u01/rman
mkdir -p /u01/app/oracle/oradata/stdorcl/pdbseed/
mkdir -p /u01/app/oracle/oradata/stdorcl/pdb/

4、主库环境开启强制归档
ALTER DATABASE FORCE LOGGING;

5、在主库已开启归档模式下修改如下参数

alter system set LOG_ARCHIVE_CONFIG='DG_CONFIG=(orcl,stdorcl)' scope=both sid='*';
alter system set log_archive_dest_1='LOCATION=/u01/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=orcl' scope=spfile;
alter system set LOG_ARCHIVE_DEST_2='SERVICE=stdorcl LGWR ASYNC  VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=stdorcl' scope=both sid='*';
alter system set fal_client='orcl' scope=both sid='*';
alter system set FAL_SERVER='stdorcl' scope=both sid='*';
alter system set standby_file_management=AUTO scope=both sid='*';
alter system set DB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/stdorcl/','/u01/app/oracle/oradata/orcl/' scope=spfile sid='*';
alter system set LOG_FILE_NAME_CONVERT='/u01/app/oracle/oradata/stdorcl/','/u01/app/oracle/oradata/orcl/' scope=spfile sid='*';
alter system set log_archive_format='%t_%s_%r.arc' scope=spfile sid='*';
alter system set remote_login_passwordfile='EXCLUSIVE' scope=spfile;
alter system set PARALLEL_EXECUTION_MESSAGE_SIZE=8192 scope=spfile;

参数解析：

LOG_ARCHIVE_CONFIG：列出主备库上的DB_UNIQUE_NAME 参数。默认情况下，定义该参数能确保主备库数据库能够互相识别对方LOG_ARCHIVE_DEST_1：本地归档路径。Primary与Standby需要定义各自的归档路径LOG_ARCHIVE_DEST_2：设置redo log的传输方式(sync or async)以及传输目标(即standby apply node)，当前节点设置的均为另一端数据库的db_unique_name，并且其中的service的值需要与tnsnames.ora别名相同。FAL_CLIENT：（Fetch Archive Log）用来解决归档裂缝，定义的客户端（获取日志的客户端），参数取自Oracle Net Service NameFAL_SERVER：当主库转为备库的时候此参数会生效。通过网络向FAL_CLIENT发送缺失的日志，参数取自Oracle Net Service Name上述例子当rac转为备库时，会向std获取redo或者归档应用。STANDBY_FILE_MANAGEMENT：当主库转为备库的时候此参数会生效。用来控制是否自动将Primary数据库增加表空间或数据文件的改动，传播到物理Standby数据库。AUTO：如果该参数值设置为AUTO，则Primary数据库执行的表空间创建操作也会被传播到物理Standby数据库上执行。
MANUAL：如果设置为MANUAL或未设置任何值（默认值是MANUAL），需要手工复制新创建的数据文件到物理Standby服务器。DB_FILE_NAME_CONVERT：当主库转为备库的时候此参数会生效。主数据库和备用数据库的数据文件转换目录对映（如果两数据库的目录结构不一样），如果有多个对映，逐一指明对映关系。注意: primary上的该参数仅在主备switch over后生效,格式应保持一致LOG_FILE_NAME_CONVERT：当主库转为备库的时候此参数会生效。定义主备log文件的存放路径转换

6、编辑主库以及备库的tnsnames.ora文件

orcl =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = primary)(PORT = 1521))  (CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = orcl)))stdorcl =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = standby)(PORT = 1521))(CONNECT_DATA =(SERVER = DEDICATED)(SID = stdorcl)))

7、在主库上生成备库的参数文件

create pfile from spfile

8、将主库的参数文件，密码文件拷贝到备库
备库的密码文件需要改成备库对应的密码文件（orapwSTANDBY_uniquename)
mv orapworcl orapwstdorcl

9、在备库上更改参数文件

*.audit_trail='NONE'
*.compatible='12.1.0.2.0'
*.control_files='/u01/app/oracle/oradata/stdorcl/control01.ctl','/u01/app/oracle/oradata/stdorcl/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_name='orcl'
*.db_unique_name='stdorcl'
*.diagnostic_dest='/u01/app/oracle'
*.log_archive_format='%t_%s_%r.arc'
*.open_cursors=300
enable_pluggable_database = true
*.pga_aggregate_target=367001600
*.processes=1000
*.remote_login_passwordfile='exclusive'
*.sga_target=891289600
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(stdorcl,orcl)'
*.LOG_ARCHIVE_DEST_1='LOCATION=/u01/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=stdorcl'
*.LOG_ARCHIVE_DEST_2='SERVICE=orcl LGWR ASYNC  VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orcl'
*.log_archive_format='%t_%s_%r.arc'
*.FAL_SERVER='orcl'
*.fal_client='stdorcl'
*.DB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/orcl/','/u01/app/oracle/oradata/stdorcl/'
*.LOG_FILE_NAME_CONVERT='/u01/app/oracle/oradata/orcl/','/u01/app/oracle/oradata/stdorcl/'
*.standby_file_management=AUTO

10、在备库增加静态监听

SID_LIST_LISTENER =(SID_LIST =(SID_DESC =(ORACLE_HOME = /u01/app/oracle/product/12.1.0/db_1)(SID_NAME = stdorcl)))
注意启动备库的监听lsnrctl start

11、在备库使用修改的参数文件启动备库数据库

startup nomount;

12、主库进入rman模式

rman target sys/oracle@orcl auxiliary sys/oracle@stdorcl
执行duplicate
run{
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
allocate AUXILIARY channel c4 type disk;
allocate AUXILIARY channel c5 type disk;
allocate AUXILIARY channel c6 type disk;
DUPLICATE TARGET DATABASEFOR STANDBYFROM ACTIVE DATABASEDORECOVERNOFILENAMECHECK;
release channel c1;
release channel c2;
release channel c3;
release channel c4;
release channel c5;
release channel c6;
}

输出过程：

using target database control file instead of recovery catalogallocated channel: c1
channel c1: SID=53 device type=DISKallocated channel: c2
channel c2: SID=62 device type=DISKallocated channel: c3
channel c3: SID=55 device type=DISKallocated channel: c4
channel c4: SID=23 device type=DISKallocated channel: c5
channel c5: SID=24 device type=DISKallocated channel: c6
channel c6: SID=25 device type=DISKStarting Duplicate Db at 2018/11/24 06:41:11
current log archivedcontents of Memory Script:
{backup as copy reusetargetfile  '/u01/app/oracle/product/12.1.0/db_1/dbs/orapworcl' auxiliary format '/u01/app/oracle/product/12.1.0/db_1/dbs/orapwstdorcl'   ;
}
executing Memory ScriptStarting backup at 2018/11/24 06:41:11
Finished backup at 2018/11/24 06:41:12contents of Memory Script:
{restore clone from service  'orcl' standby controlfile;
}
executing Memory ScriptStarting restore at 2018/11/24 06:41:12channel c4: starting datafile backup set restore
channel c4: using network backup set from service orcl
channel c4: restoring control file
channel c4: restore complete, elapsed time: 00:00:01
output file name=/u01/app/oracle/oradata/stdorcl/control01.ctl
output file name=/u01/app/oracle/oradata/stdorcl/control02.ctl
Finished restore at 2018/11/24 06:41:13contents of Memory Script:
{sql clone 'alter database mount standby database';
}
executing Memory Scriptsql statement: alter database mount standby database
Using previous duplicated file /u01/app/oracle/oradata/stdorcl/system01.dbf for datafile 1 with checkpoint SCN of 1870657
Using previous duplicated file /u01/app/oracle/oradata/stdorcl/sysaux01.dbf for datafile 3 with checkpoint SCN of 1870658
Using previous duplicated file /u01/app/oracle/oradata/stdorcl/undotbs01.dbf for datafile 4 with checkpoint SCN of 1869963
Using previous duplicated file /u01/app/oracle/oradata/stdorcl/pdbseed/system01.dbf for datafile 5 with checkpoint SCN of 1822613
Using previous duplicated file /u01/app/oracle/oradata/stdorcl/users01.dbf for datafile 6 with checkpoint SCN of 1870760contents of Memory Script:
{set newname for tempfile  1 to "/u01/app/oracle/oradata/stdorcl/temp01.dbf";set newname for tempfile  2 to "/u01/app/oracle/oradata/stdorcl/pdbseed/pdbseed_temp012018-11-24_12-05-19-AM.dbf";set newname for tempfile  3 to "/u01/app/oracle/oradata/stdorcl/pdb/pdb_temp012018-11-24_12-15-56-AM.dbf";switch clone tempfile all;set newname for datafile  1 to "/u01/app/oracle/oradata/stdorcl/system01.dbf";set newname for datafile  3 to "/u01/app/oracle/oradata/stdorcl/sysaux01.dbf";set newname for datafile  4 to "/u01/app/oracle/oradata/stdorcl/undotbs01.dbf";set newname for datafile  5 to "/u01/app/oracle/oradata/stdorcl/pdbseed/system01.dbf";set newname for datafile  6 to "/u01/app/oracle/oradata/stdorcl/users01.dbf";set newname for datafile  7 to "/u01/app/oracle/oradata/stdorcl/pdbseed/sysaux01.dbf";set newname for datafile  8 to "/u01/app/oracle/oradata/stdorcl/pdb/system01.dbf";set newname for datafile  9 to "/u01/app/oracle/oradata/stdorcl/pdb/sysaux01.dbf";set newname for datafile  10 to "/u01/app/oracle/oradata/stdorcl/pdb/SAMPLE_SCHEMA_users01.dbf";set newname for datafile  11 to "/u01/app/oracle/oradata/stdorcl/pdb/example01.dbf";restorefrom service  'orcl'   clone datafile7, 8, 9, 10, 11   ;sql 'alter system archive log current';
}
executing Memory Scriptexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMErenamed tempfile 1 to /u01/app/oracle/oradata/stdorcl/temp01.dbf in control file
renamed tempfile 2 to /u01/app/oracle/oradata/stdorcl/pdbseed/pdbseed_temp012018-11-24_12-05-19-AM.dbf in control file
renamed tempfile 3 to /u01/app/oracle/oradata/stdorcl/pdb/pdb_temp012018-11-24_12-15-56-AM.dbf in control fileexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEexecuting command: SET NEWNAMEStarting restore at 2018/11/24 06:41:18channel c4: starting datafile backup set restore
channel c4: using network backup set from service orcl
channel c4: specifying datafile(s) to restore from backup set
channel c4: restoring datafile 00007 to /u01/app/oracle/oradata/stdorcl/pdbseed/sysaux01.dbf
channel c5: starting datafile backup set restore
channel c5: using network backup set from service orcl
channel c5: specifying datafile(s) to restore from backup set
channel c5: restoring datafile 00008 to /u01/app/oracle/oradata/stdorcl/pdb/system01.dbf
channel c6: starting datafile backup set restore
channel c6: using network backup set from service orcl
channel c6: specifying datafile(s) to restore from backup set
channel c6: restoring datafile 00009 to /u01/app/oracle/oradata/stdorcl/pdb/sysaux01.dbf
channel c5: restore complete, elapsed time: 00:00:38
channel c5: starting datafile backup set restore
channel c5: using network backup set from service orcl
channel c5: specifying datafile(s) to restore from backup set
channel c5: restoring datafile 00010 to /u01/app/oracle/oradata/stdorcl/pdb/SAMPLE_SCHEMA_users01.dbf
channel c4: restore complete, elapsed time: 00:00:54
channel c4: starting datafile backup set restore
channel c4: using network backup set from service orcl
channel c4: specifying datafile(s) to restore from backup set
channel c4: restoring datafile 00011 to /u01/app/oracle/oradata/stdorcl/pdb/example01.dbf
channel c5: restore complete, elapsed time: 00:00:16
channel c6: restore complete, elapsed time: 00:00:54
channel c4: restore complete, elapsed time: 00:00:35
Finished restore at 2018/11/24 06:42:48sql statement: alter system archive log current
current log archivedcontents of Memory Script:
{restore clone force from service  'orcl' archivelog from scn  1822613;catalog clone datafilecopy  "/u01/app/oracle/oradata/stdorcl/system01.dbf", "/u01/app/oracle/oradata/stdorcl/sysaux01.dbf", "/u01/app/oracle/oradata/stdorcl/undotbs01.dbf", "/u01/app/oracle/oradata/stdorcl/pdbseed/system01.dbf", "/u01/app/oracle/oradata/stdorcl/users01.dbf";switch clone datafile  1 to datafilecopy "/u01/app/oracle/oradata/stdorcl/system01.dbf";switch clone datafile  3 to datafilecopy "/u01/app/oracle/oradata/stdorcl/sysaux01.dbf";switch clone datafile  4 to datafilecopy "/u01/app/oracle/oradata/stdorcl/undotbs01.dbf";switch clone datafile  5 to datafilecopy "/u01/app/oracle/oradata/stdorcl/pdbseed/system01.dbf";switch clone datafile  6 to datafilecopy "/u01/app/oracle/oradata/stdorcl/users01.dbf";switch clone datafile all;
}
executing Memory ScriptStarting restore at 2018/11/24 06:42:51channel c4: starting archived log restore to default destination
channel c4: using network backup set from service orcl
channel c4: restoring archived log
archived log thread=1 sequence=20
channel c5: starting archived log restore to default destination
channel c5: using network backup set from service orcl
channel c5: restoring archived log
archived log thread=1 sequence=21
channel c6: starting archived log restore to default destination
channel c6: using network backup set from service orcl
channel c6: restoring archived log
archived log thread=1 sequence=22
channel c4: restore complete, elapsed time: 00:00:04
channel c4: starting archived log restore to default destination
channel c4: using network backup set from service orcl
channel c4: restoring archived log
archived log thread=1 sequence=23
channel c5: restore complete, elapsed time: 00:00:04
channel c5: starting archived log restore to default destination
channel c5: using network backup set from service orcl
channel c5: restoring archived log
archived log thread=1 sequence=24
channel c6: restore complete, elapsed time: 00:00:04
channel c6: starting archived log restore to default destination
channel c6: using network backup set from service orcl
channel c6: restoring archived log
archived log thread=1 sequence=25
channel c4: restore complete, elapsed time: 00:00:05
channel c4: starting archived log restore to default destination
channel c4: using network backup set from service orcl
channel c4: restoring archived log
archived log thread=1 sequence=26
channel c5: restore complete, elapsed time: 00:00:05
channel c5: starting archived log restore to default destination
channel c5: using network backup set from service orcl
channel c5: restoring archived log
archived log thread=1 sequence=27
channel c6: restore complete, elapsed time: 00:00:05
channel c6: starting archived log restore to default destination
channel c6: using network backup set from service orcl
channel c6: restoring archived log
archived log thread=1 sequence=28
channel c4: restore complete, elapsed time: 00:00:00
channel c4: starting archived log restore to default destination
channel c4: using network backup set from service orcl
channel c4: restoring archived log
archived log thread=1 sequence=29
channel c5: restore complete, elapsed time: 00:00:00
channel c5: starting archived log restore to default destination
channel c5: using network backup set from service orcl
channel c5: restoring archived log
archived log thread=1 sequence=30
channel c4: restore complete, elapsed time: 00:00:00
channel c4: starting archived log restore to default destination
channel c4: using network backup set from service orcl
channel c4: restoring archived log
archived log thread=1 sequence=31
channel c6: restore complete, elapsed time: 00:00:01
channel c5: restore complete, elapsed time: 00:00:01
channel c4: restore complete, elapsed time: 00:00:00
Finished restore at 2018/11/24 06:43:02cataloged datafile copy
datafile copy file name=/u01/app/oracle/oradata/stdorcl/system01.dbf RECID=7 STAMP=993019382
cataloged datafile copy
datafile copy file name=/u01/app/oracle/oradata/stdorcl/sysaux01.dbf RECID=8 STAMP=993019382
cataloged datafile copy
datafile copy file name=/u01/app/oracle/oradata/stdorcl/undotbs01.dbf RECID=9 STAMP=993019382
cataloged datafile copy
datafile copy file name=/u01/app/oracle/oradata/stdorcl/pdbseed/system01.dbf RECID=10 STAMP=993019382
cataloged datafile copy
datafile copy file name=/u01/app/oracle/oradata/stdorcl/users01.dbf RECID=11 STAMP=993019382datafile 1 switched to datafile copy
input datafile copy RECID=7 STAMP=993019382 file name=/u01/app/oracle/oradata/stdorcl/system01.dbfdatafile 3 switched to datafile copy
input datafile copy RECID=8 STAMP=993019382 file name=/u01/app/oracle/oradata/stdorcl/sysaux01.dbfdatafile 4 switched to datafile copy
input datafile copy RECID=9 STAMP=993019382 file name=/u01/app/oracle/oradata/stdorcl/undotbs01.dbfdatafile 5 switched to datafile copy
input datafile copy RECID=10 STAMP=993019382 file name=/u01/app/oracle/oradata/stdorcl/pdbseed/system01.dbfdatafile 6 switched to datafile copy
input datafile copy RECID=11 STAMP=993019382 file name=/u01/app/oracle/oradata/stdorcl/users01.dbfdatafile 7 switched to datafile copy
input datafile copy RECID=12 STAMP=993019383 file name=/u01/app/oracle/oradata/stdorcl/pdbseed/sysaux01.dbf
datafile 8 switched to datafile copy
input datafile copy RECID=13 STAMP=993019383 file name=/u01/app/oracle/oradata/stdorcl/pdb/system01.dbf
datafile 9 switched to datafile copy
input datafile copy RECID=14 STAMP=993019383 file name=/u01/app/oracle/oradata/stdorcl/pdb/sysaux01.dbf
datafile 10 switched to datafile copy
input datafile copy RECID=15 STAMP=993019383 file name=/u01/app/oracle/oradata/stdorcl/pdb/SAMPLE_SCHEMA_users01.dbf
datafile 11 switched to datafile copy
input datafile copy RECID=16 STAMP=993019383 file name=/u01/app/oracle/oradata/stdorcl/pdb/example01.dbfcontents of Memory Script:
{set until scn  1871591;recoverstandbyclone databasedelete archivelog;
}
executing Memory Scriptexecuting command: SET until clauseStarting recover at 2018/11/24 06:43:03starting media recoveryarchived log for thread 1 with sequence 25 is already on disk as file /u01/arch/1_25_992995473.arc
archived log for thread 1 with sequence 26 is already on disk as file /u01/arch/1_26_992995473.arc
archived log for thread 1 with sequence 27 is already on disk as file /u01/arch/1_27_992995473.arc
archived log for thread 1 with sequence 28 is already on disk as file /u01/arch/1_28_992995473.arc
archived log for thread 1 with sequence 29 is already on disk as file /u01/arch/1_29_992995473.arc
archived log for thread 1 with sequence 30 is already on disk as file /u01/arch/1_30_992995473.arc
archived log for thread 1 with sequence 31 is already on disk as file /u01/arch/1_31_992995473.arc
archived log file name=/u01/arch/1_25_992995473.arc thread=1 sequence=25
archived log file name=/u01/arch/1_26_992995473.arc thread=1 sequence=26
archived log file name=/u01/arch/1_27_992995473.arc thread=1 sequence=27
archived log file name=/u01/arch/1_28_992995473.arc thread=1 sequence=28
archived log file name=/u01/arch/1_29_992995473.arc thread=1 sequence=29
archived log file name=/u01/arch/1_30_992995473.arc thread=1 sequence=30
archived log file name=/u01/arch/1_31_992995473.arc thread=1 sequence=31
media recovery complete, elapsed time: 00:00:00
Finished recover at 2018/11/24 06:43:05
Finished Duplicate Db at 2018/11/24 06:43:09released channel: c1released channel: c2released channel: c3released channel: c4released channel: c5released channel: c6

13、在备库上创建spfile文件
create spfile from pfile;

然后重启备库
shudown startup

14、查询主库状态
在主节点执行

select SWITCHOVER_STATUS,DATABASE_ROLE,PROTECTION_MODE,OPEN_MODE FROM v$database;

默认应该为MAXIMIZE PERFORMANCE

15、备库开启实时应用模式

12c可以不用using current logfile字句，使用实时日志
SQL> alter database recover managed standby database disconnect;

SQL>alter database open;  (if not open)SQL> SELECT NAME,DATABASE_ROLE,PROTECTION_MODE,OPEN_MODE FROM V$DATABASE;NAME  DATABASE_ROLE        PROTECTION_MODE                    OPEN_MODE
----- -------------------- --------------------------
RAC   PHYSICAL STANDBY     MAXIMUM PERFORMANCE                READ ONLY WITH APPLY

16、主备库查询比对
在备库

SQL> select process,status from v$managed_standby;
PROCESS   STATUS
--------- ------------
ARCH      CLOSING
ARCH      CONNECTED
RFS       IDLE
RFS       IDLE
MRP0      APPLYING_LOG

在主节点多次切换日志文件，查询主备节点是否一致

alter system switch logfile;
SQL> select thread#,max(sequence#) from v$log_history group by thread#;

–以下为查询DataGuard状态

SQL> select thread#,sequence#,archived,applied from v$archived_log order by sequence# desc;

17、同步检查
在主库：

#su - oracle
$sqlplus / as sysdba
SQL>create table test as select * from dba_objects where rownum < 101;

在备库：

#su - oracle
$sqlplus / as sysdba
SQL>select count(*) from test;
count(*)
---------------
100
结果为100表示实时同步成功
在主库：
SQL> drop table test purge;

二、维护使用

2.1 检查主备库的归档日志号

在主库检查日志号：SQL> archive log list;
SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            +ARCH
Oldest online log sequence     159
Next log sequence to archive   160
Current log sequence           160

在备库检查日志号SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            /u01/arch_std
Oldest online log sequence     159
Next log sequence to archive   0
Current log sequence           160检查主库、备库当前的Current log sequence是否都是一样的

2.2 检查备库的归档日志同步情况以及应用指标参数

在备库执行：

查询日志应用情况
SQL> select thread#,sequence#,first_time,next_time,applied from v$archived_log where applied='YES';SQL> select thread#,sequence#,first_time,next_time,applied from v$archived_log where applied='NO';

SQL> SELECT  PROCESS, STATUS,THREAD#,SEQUENCE#,BLOCK#,BLOCKS, DELAY_MINS FROM V$MANAGED_STANDBY; PROCESS   STATUS          THREAD#  SEQUENCE#     BLOCK#     BLOCKS DELAY_MINS
--------- ------------ ---------- ---------- ---------- ---------- ----------
ARCH      CLOSING               1        168          1          1          0
ARCH      CLOSING               1        169          1         77          0
ARCH      CONNECTED             0          0          0          0          0
ARCH      CLOSING               2         96          1         31          0
RFS       IDLE                  0          0          0          0          0
RFS       IDLE                  0          0          0          0          0
RFS       IDLE                  0          0          0          0          0
RFS       IDLE                  2         97       4557          1          0
RFS       IDLE                  0          0          0          0          0
RFS       IDLE                  0          0          0          0          0
RFS       IDLE                  1        170       3917          1          0
MRP0      APPLYING_LOG          2         97       4555     102400          0

查询备库日志应用的速率

select * from V$RECOVERY_PROGRESS;

也可通过动态性能视图，如下查询
SQL> select message from V$DATAGUARD_STATUS order by TIMESTAMP;
该动态性能视图显示出在主库上产生了多少重做日志数据,但是还没有被备库所应用
MESSAGEARC0: Archival started
ARC1: Archival started
ARC2: Archival started
ARC1: Becoming the 'no FAL' ARCH
ARC2: Becoming the heartbeat ARCH
ARC2: Becoming the active heartbeat ARCH
ARC3: Archival started
RFS[1]: Assigned to RFS process 1723
RFS[2]: Assigned to RFS process 1725
RFS[3]: Assigned to RFS process 1720
ARC3: Beginning to archive thread 1 sequence 100 (943743-966774)
ARC3: Completed archiving thread 1 sequence 100 (0-0)
Primary database is in MAXIMUM PERFORMANCE mode
ARC0: Completed archiving thread 1 sequence 105 (0-0)
ARC0: Beginning to archive thread 1 sequence 105 (989272-989582)
RFS[5]: Assigned to RFS process 1742
RFS[4]: Assigned to RFS process 1740
Attempt to start background Managed Standby Recovery process
MRP0: Background Managed Standby Recovery process started
Managed Standby Recovery starting Real Time Apply
Media Recovery Waiting for thread 2 sequence 18  观察可以发现是在等待thread2的日志应用

备注：
1、检查主备库之间的日志同步情况，如是是YES表示同步成功的，如果是NO表示没同步同成的日志,根据主备库与具体时间来确定。
2、实时应用MRP通常是APPLYING_LOG，ADG下通常是WAIT_FOR_LOG

2.3 查看主备库的模式

查看主备库性能模式

主库
SQL> SELECT NAME,DATABASE_ROLE,PROTECTION_MODE,OPEN_MODE FROM V$DATABASE;
NAME      DATABASE_ROLE    PROTECTION_MODE      OPEN_MODE
--------- ---------------- -------------------- --------------------
ORCLDB    PRIMARY          MAXIMUM PERFORMANCE  READ WRITE
默认为最大性能模式

备库
SQL> SELECT NAME,DATABASE_ROLE,PROTECTION_MODE,OPEN_MODE FROM V$DATABASE;NAME      DATABASE_ROLE    PROTECTION_MODE      OPEN_MODE
--------- ---------------- -------------------- --------------------
ORCLDB    PHYSICAL STANDBY MAXIMUM PERFORMANCE  READ ONLY WITH APPLY
备库最大性能模式，已开启日志应用

检查应用模式(是否启用了实时应用)

查询v$archive_dest_status 视图，如果打开了实时应用，则recovery_mode为：MANAGED REAL TIME APPLY，例如：
备库：
SQL> select recovery_mode from v$archive_dest_status where DEST_NAME='LOG_ARCHIVE_DEST_1';RECOVERY_MODE-----------------------MANAGED REAL TIME APPLY
主库：SQL> select recovery_mode from v$archive_dest_status where DEST_NAME='LOG_ARCHIVE_DEST_2'; RECOVERY_MODE
-----------------------
MANAGED REAL TIME APPLY

2.4 主备库归档日志维护

可以使用rman脚本清除备库已经应用完的归档日志
clean_arch.sh

#!/bin/bashexport ORACLE_SID=orcl
export ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1
export ORACLE_BASE=/u01/app/oracle
time=`date +"20%y%m%d%H%M%S"`
logdir="/home/oracle/arch_clean_log"
find $logdir -type f -name "*.log" -mtime +7 -exec rm -rf {} \;
$ORACLE_HOME/bin/rman target /  log=$logdir/archClean_$time.log  <<EOF
run{
crosscheck archivelog all;
delete noprompt expired archivelog all;
DELETE noprompt ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-7';
}
exit
EOF

crontab
0 22 * * * /bin/bash /home/oracle/clean_arch.sh >/dev/null 2>&1

2.5 备库磁盘空间不足处理

当主库创建新的数据文件，然而备库没有空间时，应当先扩容备库磁盘，然后将备库的文件管理改成手动管理，使用命令在备库创建对应的数据文件。

1、在主库创建新的表空间test，并且增加数据文件7，8

SQL> select file#,name from v$datafile;FILE# NAME
---------- --------------------------------------------------1 +ORADATA/orcl/datafile/system.273.9712542832 +ORADATA/orcl/datafile/sysaux.272.9712543033 +ORADATA/orcl/datafile/undotbs1.271.9712543234 +ORADATA/orcl/datafile/undotbs2.269.9712543795 +ORADATA/orcl/datafile/users.268.9712543836 +ORADATA/orcl/datafile/admin.260.9829396997 +ORADATA/orcl/datafile/test.259.9830068238 +ORADATA/orcl/datafile/test.276.983007417

2、备库查询数据文件

SQL> select file#,name from v$datafile;FILE# NAME
---------- --------------------------------------------------1 /u01/app/oracle/oradata/orcl/datafile/system.273.9712542832 /u01/app/oracle/oradata/orcl/datafile/sysaux.272.9712543033 /u01/app/oracle/oradata/orcl/datafile/undotbs1.271.9712543234 /u01/app/oracle/oradata/orcl/datafile/undotbs2.269.9712543795 /u01/app/oracle/oradata/orcl/datafile/users.268.9712543836 /u01/app/oracle/oradata/orcl/datafile/admin.260.9829396997 /u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED000078 /u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00008可以看到备库的数据文件，并没有真正的创建，只是创建了临时文件。

3、等备库磁盘空间充足时（新挂1块盘），手动创建数据文件对应主库

--默认为自动管理，改为手动管理
SQL> alter system set standby_file_management='MANUAL';

--由于u01空间已不够，可将数据文件创建到u02
SQL> alter database create datafile '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00007' as '/u02/oradata/test_1.dbf';SQL> alter database create datafile '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00008' as '/u02/oradata/test_2.dbf';

4、将备库数据文件管理改回自动

SQL> alter system set standby_file_management='AUTO';

5、打开备库的日志应用
由于之前备库磁盘空间不足，无法创建新的数据文件，mrp进程会停止应用，现在需要手动启用

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

6、检查主备库新的表空间数据是否同步

备注：系统做同步时，会先建临时文件，名称如下：
/u01/app/oracle/product/11.2.0.4/dbhome_1/dbs/UNNAMED000XX
如果空间足够，就会成功同步，并将文件更名为正确的名称和路径。

2.6 重建备库

如果备库损坏，可以将其删除之后再次重建。
1、删除备库
此方法只删除备库的数据文件，日志文件，控制文件，临时文件。

SQL> shutdown immediate;
SQL> startup restrict mount; （只有sysdba用户可以连）
SQL> select name from v$database;NAME
---------
ORCLDBSQL> drop database;

2、重新用备库的pfile文件将备库启动到nomount

3、主库重新用rman duplicate创建备库

三、取消DataGuard环境

3.1 Standby Database Alone

如果主库已完全不能使用，可将备库脱离dataguard环境，成为独立数据库。
1、修改备库的pfile
去掉dg环境参数

LOG_ARCHIVE_CONFIG
DB_FILE_NAME_CONVERT
LOG_FILE_NAME_CONVERT
LOG_ARCHIVE_DEST_STATE_2
STANDBY_FILE_MANAGEMENT
FAL_SERVER
FAL_CLIENT

2、启动数据库脱离dg环境

SQL>  ALTER DATABASE ACTIVATE PHYSICAL STANDBY DATABASE;
SQL>  SHUTDOWN IMMEDIATE;
SQL>  STARTUP

3、查看数据库状态

SQL> select database_role,switchover_status,open_mode from v$database;DATABASE_ROLE    SWITCHOVER_STATUS    OPEN_MODE
---------------- -------------------- --------------------
PRIMARY          NOT ALLOWED          READ WRITE已脱离dg

4、测试备库读写

参考MOS ID 2074686.1

3.2 主库脱离DataGuard

当主库不需要与备库保持数据同步，可以将主库有关dg的初始化参数移除，使主库完全脱离DataGuard环境。
1、查询确认主库是否是最大性能模式
如果不是最大性能模式，需要使用命令修改

SQL> ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE;

2、移除(S)PFILE 参数文件dg参数

LOG_ARCHIVE_CONFIG
DB_FILE_NAME_CONVERT
LOG_FILE_NAME_CONVERT
LOG_ARCHIVE_DEST_n pointing to the Standby Database and valid for STANDBY_LOGFILES
LOG_ARCHIVE_DEST_STATE_n
DG_BROKER_START
DG_BROKER_CONFIG_FILE1
DG_BROKER_CONFIG_FILE2
STANDBY_ARCHIVE_DEST
STANDBY_FILE_MANAGEMENT
FAL_SERVER
FAL_CLIENT

3、删除主库所有的Standby Redolog Groups

SQL> SELECT GROUP# FROM V$STANDBY_LOG;
SQL> alter database drop standby logfile group 3;

4、删除 Data Guard Broker Configuration 配置文件

SQL> show parameter DG_BROKER_CONFIG;$ORACLE_HOME/dbs/dr1<ORACLE_SID>.dat and
$ORACLE_HOME/dbs/dr2<ORACLE_SID>.dat

参考MOS ID 733794.1

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