欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  数据库

Oracle GoldenGate extract进程的工作方式

程序员文章站 2023-12-24 13:52:45
...

oracle goldengate先从online log日志抽取数据,然后才会从archived log中进行抽取,这可以通过下面的方式来验证.

Oracle goldengate先从online log日志抽取数据,然后才会从archived log中进行抽取,这可以通过下面的方式来验证.

1、主库端插入测试数据
SQL> insert into gg1.dept values(81,'1','1');

1 row created.

SQL> commit;

Commit complete.

SQL> alter system switch logfile;

System altered.

SQL> insert into gg1.dept values(82,'2','2');

1 row created.

SQL> commit;

Commit complete.

SQL> insert into gg1.dept values(83,'3','3');

1 row created.

SQL> commit;

Commit complete.

SQL> alter system switch logfile;

System altered.

SQL> insert into gg1.dept values(84,'4','4');

1 row created.

SQL> commit;

Commit complete.

在这里多次执行alter system switch logfile;

这里比较关键,在后面我们会删除, 82、83对应的归档日志, 如果没有覆盖掉82、83对应的online log,goldengate的extract进程不会异常中止,extract进程会优选online log。

2、在这里我们覆盖掉online log,然后删除82、83对应的归档日志。

3、查看goldengate状态,,extract进程异常中止
GGSCI (slav2) 1> info all

Program Status Group Lag Time Since Chkpt

MANAGER RUNNING
EXTRACT RUNNING D1PUMP 00:00:00 00:00:02
EXTRACT ABENDED EXT1 00:03:10 00:02:29

GGSCI (slav2) 2> info ext1

EXTRACT EXT1 Last Started 2013-01-21 22:15 Status ABENDED
Checkpoint Lag 00:03:10 (updated 00:02:33 ago)
Log Read Checkpoint Oracle Redo Logs
2013-01-21 22:11:50 Seqno 28, RBA 67584

[oracle@slav2 ggs]$ vi ggserr.log
2013-01-21 22:14:59 INFO OGG-00975 Oracle GoldenGate Manager for Oracle, mgr.prm: EXTRACT EXT1 starting.
2013-01-21 22:14:59 INFO OGG-00992 Oracle GoldenGate Capture for Oracle, ext1.prm: EXTRACT EXT1 starting.
2013-01-21 22:15:00 WARNING OGG-01423 Oracle GoldenGate Capture for Oracle, ext1.prm: No valid default archive log destination directory found for thread 1.
2013-01-21 22:15:00 INFO OGG-01513 Oracle GoldenGate Capture for Oracle, ext1.prm: Positioning to Sequence 28, RBA 67088.
2013-01-21 22:15:00 INFO OGG-01516 Oracle GoldenGate Capture for Oracle, ext1.prm: Positioned to Sequence 28, RBA 67088, Jan 21, 2013 10:11:50 PM.
2013-01-21 22:15:00 INFO OGG-00993 Oracle GoldenGate Capture for Oracle, ext1.prm: EXTRACT EXT1 started.
2013-01-21 22:15:00 INFO OGG-01055 Oracle GoldenGate Capture for Oracle, ext1.prm: Recovery initialization completed for target file /u01/app/ggs/dirdat/lt000004, at RBA 1672.
2013-01-21 22:15:00 INFO OGG-01478 Oracle GoldenGate Capture for Oracle, ext1.prm: Output file /u01/app/ggs/dirdat/lt is using format RELEASE 10.4/11.1.
2013-01-21 22:15:00 INFO OGG-01026 Oracle GoldenGate Capture for Oracle, ext1.prm: Rolling over remote file /u01/app/ggs/dirdat/lt000004.
2013-01-21 22:15:00 INFO OGG-01053 Oracle GoldenGate Capture for Oracle, ext1.prm: Recovery completed for target file /u01/app/ggs/dirdat/lt000005, at RBA 968.
2013-01-21 22:15:00 INFO OGG-01057 Oracle GoldenGate Capture for Oracle, ext1.prm: Recovery completed for all targets.
2013-01-21 22:15:00 INFO OGG-01517 Oracle GoldenGate Capture for Oracle, ext1.prm: Position of first record processed Sequence 28, RBA 67088, SCN 0.610617, Jan 21, 2013 10:11:50 PM.

Oracle GoldenGate extract进程的工作方式

上一篇:

下一篇: