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GoldenGate 指定时间点重新抽取事务变化

WBOY
WBOYOriginal
2016-06-07 16:45:42890browse

今天的实验是演示goldengate指定时间点重新抽取事务。

今天的实验是演示goldengate指定时间点重新抽取事务。

实验步骤:
1,制定一个重新抽取的SCN
2,,根据SCN在v$archived_log视图找到起始时间
3,停止抽取进程
4,重置抽取进程的开始时间
5,启动抽取进程重新捕获事务(从归档日志中获取)

1,查看源端当前的SCN,记录该值作为重新抽取的时间点
SQL> select dbms_flashback.get_system_change_number from dual;

GET_SYSTEM_CHANGE_NUMBER
------------------------
                1507066

2,查看当前抽取进程ex1的状态
GGSCI (node3) 2> info ex1 detail

EXTRACT    EX1      Last Started 2014-11-02 18:19  Status RUNNING
Checkpoint Lag      00:00:00 (updated 00:00:06 ago)
Log Read Checkpoint  Oracle Redo Logs
                    2014-11-02 19:09:40  Thread 1, Seqno 12, RBA 10750464
                    SCN 0.1507682 (1507682)
Log Read Checkpoint  Oracle Redo Logs
                    2014-11-02 19:09:39  Thread 2, Seqno 12, RBA 9300480
                    SCN 0.1507682 (1507682)

  Target Extract Trails:

  Remote Trail Name                                Seqno        RBA    Max MB

  /goldengate/dirdat/ex                                2    205729          5

  Extract Source                          Begin            End

  +DATA/prod/onlinelog/group_4.302.859509357  2014-11-02 18:02  2014-11-02 19:09
  Not Available                          * Initialized *  2014-11-02 18:02

Current directory    /goldengate

Report file          /goldengate/dirrpt/EX1.rpt
Parameter file      /goldengate/dirprm/ex1.prm
Checkpoint file      /goldengate/dirchk/EX1.cpe
Process file        /goldengate/dirpcs/EX1.pce
Stdout file          /goldengate/dirout/EX1.out
Error log            /goldengate/ggserr.log


3,查看当前系统时间以及目前存在的local trail文件

[oracle@single goldengate]$ ls -l dirdat
total 424
-rw-rw-rw- 1 oracle oinstall 205826 Nov  1 16:02 rt000000
-rw-rw-rw- 1 oracle oinstall  1192 Nov  1 16:57 rt000001
-rw-rw-rw- 1 oracle oinstall  1161 Nov  1 17:20 rt000002

4,在源端节点2登录测试用户snow,向测试表插入100万条记录
SYS@PROD2 > conn snow/snow

SNOW@PROD2 > begin for i in 1001..1000000 loop
  2  insert into t1 values(i,'Fin');
  3  end loop;
  4  commit;
  5  end;
  6  /

目标端snow.t1成功复制100万条记录
SQL> conn snow/snow
Connected.
SQL> select count(*) from t1;

  COUNT(*)
----------
  1000000

插入100条数据使得源端生成了22个local trail文件,从ex000003-ex000024

[oracle@node3 dirdat]$ ll
total 104128
-rw-rw-rw- 1 oracle oinstall  205795 Nov  2 17:24 ex000000
-rw-rw-rw- 1 oracle oinstall    1076 Nov  2 18:19 ex000001
-rw-rw-rw- 1 oracle oinstall 4999907 Nov  3 10:02 ex000003
-rw-rw-rw- 1 oracle oinstall 4999952 Nov  3 10:02 ex000004
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000005
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000006
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000007
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000008
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000009
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000010
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000011
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000012
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000013
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000014
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000015
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000016
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000017
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000018
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000019
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000020
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000021
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000022
-rw-rw-rw- 1 oracle oinstall 4999951 Nov  3 10:02 ex000023
-rw-rw-rw- 1 oracle oinstall 1122278 Nov  3 10:02 ex000024

5, 根据SCN1507066,查找相对应时间。

所在归档日志为红色表示记录。该日志生成的时间为2014-11-02 17:41:26,接下来采用该时间作为重新生成local trail的参数。

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