stream系列 -- 基于表级复制

-- 开启归档

SQL> archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            /u01/app/archlog

Oldest online log sequence     452

Next log sequence to archive   454

Current log sequence           454

--配置数据库相关参数

SQL> show parameter global_names

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

global_names                         boolean     FALSE

SQL> alter system set global_names=TRUE scope=both;

System altered.

--建议的最低值为4,定义传播进程数,11GR2默认为1000

SQL> show parameter job_queue_process;    

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

job_queue_processes                  integer     1000

--定义数据库的db_link连接数,保持默认值4

SQL> show parameter open_links

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

open_links                           integer     4

open_links_per_instance              integer     4

SQL>

SQL> show parameter statistics_level

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

statistics_level                     string      TYPICAL

SQL> show parameter aq

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

aq_tm_processes                      integer     0

SQL> alter system set aq_tm_processes=1 scope=both;

System altered.

QL> alter system set streams_pool_size=256M scope=spfile；

System altered.

SQL> alter system set "_job_queue_interval"=1 scope=spfile;

System altered.

上面参数修改完成后重启数据库生效

3，配置流复制用户

--创建表空间

SQL>  create tablespace streams_tbs datafile '/u01/datafile/streams_tbs.dbf' size 100m autoextend on next 1m maxsize unlimited;

Tablespace created.

-创建用户

SQL> create user stradmin identified by stradmin default tablespace streams_tbs ;

User created.

--赋予权限

SQL> grant dba to stradmin;

Grant succeeded.

begin

dbms_streams_auth.grant_admin_privilege(

grantee => 'stradmin',

grant_privileges => true);

end;

配置监听

--source db 配置

targetdb =

 (DESCRIPTION =

   (ADDRESS_LIST =

     (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.3.74)(PORT = 1521))

   )

   (CONNECT_DATA =

     (SERVICE_NAME = PREMIUMIT)

   )

 )

-- target db 配置

sourcedb =

 (DESCRIPTION =

   (ADDRESS_LIST =

     (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.3.73)(PORT = 1521))

   )

   (CONNECT_DATA =

     (SERVICE_NAME = PREMIUMIT)

   )

 )

--创建db link

-- source db

SQL> conn stradmin/stradmin

Connected.

SQL> create database link strm_link connect to stradmin identified by stradmin using 'targetdb';

Database link created.

SQL> select sysdate from dual@strm_link;

SYSDATE

---------

30-NOV-13

--创建测试用户（source 和target 同时创建）

SQL> create user test1 identified by test1;

User created.

SQL> grant connect,resource to test1;

Grant succeeded.

SQL> conn test1/test1

Connected.

SQL> create table test1 as select rownum id from dual;

Table created.

-- 创建source queue

BEGIN

DBMS_STREAMS_ADM.SET_UP_QUEUE(

queue_table => 'SOURCE_QUEUE_TABLE',

queue_name  => 'SOURCE_QUEUE',

queue_user  => 'stradmin');          

END;

/

-- 在目标端创建接收队列

BEGIN

DBMS_STREAMS_ADM.SET_UP_QUEUE(

queue_table => 'TARGET_QUEUE_TABLE',

queue_name  => 'TARGET_QUEUE',

queue_user  => 'stradmin');

END;

/

-- 创建source db 创建 capture进程

BEGIN

DBMS_STREAMS_ADM.ADD_TABLE_RULES(

table_name     => 'test1.test1',

streams_type      => 'capture',

streams_name     => 'capture_stream',

queue_name       => 'stradmin.SOURCE_QUEUE',

include_dml       => true,

include_ddl        => true,

source_database => 'PREMIUMI',

include_tagged_lcr => false,

inclusion_rule     => true);

end;

/

--查看状态

SQL> col CAPTURE_NAME for a15;

SQL> col  QUEUE_NAME for a15;

SQL> select CAPTURE_NAME,QUEUE_NAME,START_SCN,STATUS,CAPTURE_TYPE from dba_capture;

CAPTURE_NAME    QUEUE_NAME       START_SCN STATUS   CAPTURE_TY

--------------- --------------- ---------- -------- ----------

CAPTURE_STREAM  SOURCE_QUEUE       4467438 DISABLED LOCAL

SQL>

-- 创建传播进程

BEGIN

DBMS_STREAMS_ADM.ADD_TABLE_PROPAGATION_RULES(

table_name                => 'test1.test1',

streams_name               => 'source_to_target',

source_queue_name          => 'stradmin.SOURCE_QUEUE',

destination_queue_name    => 'stradmin.TARGET_QUEUE@strm_link',

include_dml               => true,

include_ddl               => true,

source_database           => 'PREMIUMI',

inclusion_rule            => true,

queue_to_queue            => true);

END;

/

SQL> select PROPAGATION_NAME,SOURCE_QUEUE_NAME,DESTINATION_QUEUE_NAME,DESTINATION_DBLINK,STATUS from dba_propagation;

PROPAGATION_NAM SOURCE_QUEUE_NA DESTINATION_QUE DESTINATION_DBL STATUS

--------------- --------------- --------------- --------------- --------

SOURCE_TO_TARGE SOURCE_QUEUE    TARGET_QUEUE    STRM_LINK       ENABLED

T

-- TARGET DB 创建apply进程

BEGIN

DBMS_STREAMS_ADM.ADD_TABLE_RULES(

table_name      => 'test1.test1',

streams_type    => 'apply',

streams_name    => 'target_apply_stream',

queue_name      => 'stradmin.TARGET_QUEUE',

include_dml     => true,

include_ddl     => true,

include_tagged_lcr => false,

source_database => 'PREMIUMI',

inclusion_rule => true);

END;

/

-- 查看apply进程状态

SQL> select apply_name,queue_name,status from dba_apply;

APPLY_NAME                     QUEUE_NAME                     STATUS

------------------------------ ------------------------------ --------

TARGET_APPLY_STREAM            TARGET_QUEUE                   DISABLED

-- 通过设置scn进行实例化

source db scn

SQL> select DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER() from dual;

DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER()

-----------------------------------------

                                 4469126

-- target db 执行过程

BEGIN

DBMS_APPLY_ADM.SET_TABLE_INSTANTIATION_SCN(

SOURCE_OBJECT_NAME => 'test1.test1',

source_database_name => 'PREMIUMI',

instantiation_scn => 4469126);

END;

/

-- 启动apply进程

BEGIN

DBMS_APPLY_ADM.START_APPLY(

apply_name => 'target_apply_stream');

END;

/

SQL> select apply_name,queue_name,status from dba_apply;

APPLY_NAME                     QUEUE_NAME                     STATUS

------------------------------ ------------------------------ --------

TARGET_APPLY_STREAM            TARGET_QUEUE                   ENABLED

-- 启动capture进程

BEGIN

DBMS_CAPTURE_ADM.START_CAPTURE(

capture_name => 'capture_stream');

END;

/

SQL> select capture_name,status,CAPTURED_SCN,APPLIED_SCN from dba_capture;

CAPTURE_NAME    STATUS   CAPTURED_SCN APPLIED_SCN

--------------- -------- ------------ -----------

CAPTURE_STREAM  ENABLED       4467438     4467438

-- 验证

--source db

SQL> select * from test1;

       ID

----------

        1

SQL> insert into test1 values (2);

-- tartget db

SQL> select * from test1;

       ID

----------

        1

SQL> /

       ID

----------

        1

SQL> /

       ID

----------

        1

SQL> /

       ID

----------

        1

SQL> /

       ID

----------

        1

        2

可以看出有一定的延迟

--ddl 同步

source db

SQL>  alter table test1 add name varchar2(10);

Table altered.

SQL> create table test2 (id int);

Table created.

target db

SQL>  desc test1;

Name                                      Null?    Type

----------------------------------------- -------- ----------------------------

ID                                                 NUMBER

NAME                                               VARCHAR2(10)

SQL> desc test2;

ERROR:

ORA-04043: object test2 does not exist