Oracle Stream概述與配置
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<span style="background-color:inherit;line-height:1.5;">Oracle Stream概述與配置 </span>
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介紹一下Streams和goldengate的比較
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1.異構複製
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streams 僅支援oracle-oracle
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GG 支援不同平臺的複製
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2.capture方式
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streams 透過logmnr的方式抽取redo和archivelog中的資料,效率相比更低一些
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GG 透過GG獨有的方式抽取記憶體、redo、archivelog中資料,效率相比更高一些
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3.收集資料
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streams Oracle專有後臺程式
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GG 外部程式(extract/replicat)
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4.記憶體分配
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Streams SGA(stream pool)
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GG OS memory
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5.事務 – 資料收集階段(源資料庫)
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Streams 所有的事務(commit,uncommited)
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GG 提交的事務
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6.資料應用階段(目標資料庫)
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Sreams 過濾掉uncommited資料
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GG 收到的資料都是提交過的,直接應用。
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7.事務的順序
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Streams SCN的順序
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GG commit先後順序
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下面進行1個DEMO演示Stream配置部署:
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step1. 引數配置
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Source-Target:
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<span style="background-color:inherit;line-height:1.5;">archive log listalter system set aq_tm_processes=2 scope=both; alter system set streams_pool_size=200M scope=spfile; alter database add supplemental log data;alter system set "_job_queue_interval"=1 scope=spfile;startup force; </span>
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step2. 建立Streams管理使用者
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Source-Target:
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create tablespace tbs_stream datafile size 100M;create user strmadmin identified by strmadmin default tablespace tbs_stream;grant dba to strmadmin;
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step3. 建立業務使用者
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Source-Target:
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create tablespace tianbaobao datafile size 100M;create user tianbaobao identified by tianbaobao default tablespace tbs_stream;grant dba to tianbaobao;
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step4. 配置環境tnsnames.ora
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Source-Target:
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SOURCEDB = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = source.ht8888.ht3)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = sourcedb) ) )
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TARGETDB = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = target.ht8888.ht3)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = targetdb) ) )
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step5.建立DBlink(如果不配置雙向複製,無需配置目標到源的DBlink)
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create database link strm_link connect to strmadmin identified by strmadmin using 'targetdb';
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step6.建立Streams Queue
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Source-Target:
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sqlplus strmadmin/strmadmin@sourcedbbegin dbms_streams_adm.set_up_queue( queue_table => 'source_queue_table', queue_name => 'source_queue'); end; /
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sqlplus strmadmin/strmadmin@targetdbbegin dbms_streams_adm.set_up_queue( queue_table => 'target_queue_table', queue_name => 'target_queue'); end; /
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step7.源建立捕獲程式
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connect strmadmin/strmadmin@sourcedbbegin dbms_streams_adm.add_schema_rules(schema_name => 'tianbaobao', streams_type => 'capture', streams_name => 'capture_source', queue_name => 'strmadmin.source_queue', include_dml => true, include_ddl => true, inclusion_rule => true); end; /
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step8.源建立傳播程式
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connect strmadmin/strmadmin@sourcedbbegin dbms_streams_adm.add_schema_propagation_rules( schema_name => 'tianbaobao', streams_name => 'source_to_target', source_queue_name => 'strmadmin.source_queue', destination_queue_name => 'strmadmin.target_queue@strm_link', include_dml => true, include_ddl => true, source_database => 'sourcedb', inclusion_rule => true,queue_to_queue => true); end; /
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#修改propagation休眠時間為0,表示實時傳播LCR。
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connect strmadmin/strmadmin@sourcedbbegin dbms_aqadm.alter_propagation_schedule( queue_name => 'source_queue', destination => 'strm_link', destination_queue => 'target_queue',latency => 0); end; /
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step9.目標建立應用程式
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connect strmadmin/strmadmin@sourcedbbegin dbms_streams_adm.add_schema_rules( schema_name => 'tianbaobao', streams_type => 'apply', streams_name => 'apply_target', queue_name => 'strmadmin.target_queue', include_dml => true, include_ddl => true, source_database => 'sourcedb', inclusion_rule => true); end; /
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step10.資料庫直接設定SCN的方式進行例項化
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---獲取源庫互置使用者的SCN
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connect strmadmin/strmadmin@sourcedb set serveroutput on DECLARE iscn NUMBER;
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-- Variable to hold instantiation SCN valueBEGIN iscn := DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER(); DBMS_OUTPUT.PUT_LINE ('Instantiation SCN is: ' || iscn);END; /
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---設定為目標庫互置使用者的SCN
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connect streamadmin/streamadmin@targetdbBEGIN DBMS_APPLY_ADM.SET_SCHEMA_INSTANTIATION_SCN( source_schema_name => 'TIANBAOBAO', source_database_name => 'SOURCEDB', instantiation_scn => &iscn);END; /
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step11.啟動捕獲和應用程式
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connect strmadmin/strmadmin@sourcedbexec dbms_capture_adm.start_capture(capture_name => 'capture_source');
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connect strmadmin/strmadmin@targetexec dbms_apply_adm.start_apply(apply_name => 'apply_target');
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step12.建立測試表程式測試
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Source:sqlplus tianbaobao/tianbaobao@sourcedbSQL> create table tb30(x int);
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Table created.
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SQL> insert into tb30 values (1);
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1 row created.
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SQL> commit;
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Commit complete.
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SQL> alter table tb30 add y int ;
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Table altered.
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SQL> insert into tb30 values (2,2);
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1 row created.
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SQL> commit;
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Commit complete.
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SQL>
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Traget:sqlplus tianbaobao/tianbaobao@targetdbSQL> select * from tb30;
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X Y---------- ---------- 1 2 2
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SQL>
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step13 .常用命令
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select CAPTURE_NAME,QUEUE_NAME,STATUS,CAPTURED_SCN,APPLIED_SCN from dba_capture;
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select PROPAGATION_NAME,SOURCE_QUEUE_OWNER,SOURCE_QUEUE_NAME,DESTINATION_QUEUE_NAME,DESTINATION_DBLINK,STATUS from dba_propagation;
</div>
<div style="font-family:微軟雅黑;font-size:14px;line-height:21px;white-space:normal;widows:auto;background-color:#FFFFFF;">
select APPLY_NAME,ERROR_NUMBER,STATUS from dba_apply;
</div>
<div style="font-family:微軟雅黑;font-size:14px;line-height:21px;white-space:normal;widows:auto;background-color:#FFFFFF;">
select APPLY_NAME,QUEUE_NAME,MESSAGE_NUMBER,ERROR_NUMBER,ERROR_MESSAGE from dba_apply_error;
</div>
<div style="font-family:微軟雅黑;font-size:14px;line-height:21px;white-space:normal;widows:auto;background-color:#FFFFFF;">
exec dbms_capture_adm.stop_capture(capture_name => 'capture_source');
</div>
<div style="font-family:微軟雅黑;font-size:14px;line-height:21px;white-space:normal;widows:auto;background-color:#FFFFFF;">
exec dbms_apply_adm.stop_apply(apply_name => 'apply_target');
</div>
<div style="font-family:微軟雅黑;font-size:14px;line-height:21px;white-space:normal;widows:auto;background-color:#FFFFFF;">
exec DBMS_STREAMS_ADM.remove_streams_configuration();
</div>
<div>
<br />
</div>
來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/31520497/viewspace-2156757/,如需轉載,請註明出處,否則將追究法律責任。
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