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http://blog.csdn.net/chentaocba/article/details/7435131
http://www.cnblogs.com/myrunning/p/5329139.html
Oracle 10.2 CDC：http://docs.oracle.com/cd/B19306_01/server.102/b14223/cdc.htm
Oracle 11g CDC：http://docs.oracle.com/cd/B28359_01/server.111/b28313/cdc.htm#CHDEHIIE
DBMS_CDC_PUBLISH：http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_cdcpub.htm#ARPLS023
DBMS_CDC_SUBSCRIBE：http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_cdcsub.htm#ARPLS024
Oracle 11.2 CDC:
https://docs.oracle.com/cd/E11882_01/server.112/e25554/cdc.htm#DWHSG016
执行订阅表信息时，提示ORA-31466：未找到发布内容，排查发现是没有将变更表cdc_employee_info的查询权限赋予订阅者用户cdc_subscriber导致。
解决方法：
SQL> conn cdc_publisher/cdc_publisher
Connected.
SQL> grant select on cdc_employee_info to cdc_subscriber;
Grant succeeded.
监控SYS用户的employee_info表，没有出现任何异常，就是捕获不到数据，后来我替换给backupuser用户的employee_info表，按照以上步骤操作，就能正常捕获到数据了，官网也没查到相关的文档说明，很奇怪，还需要进一步研究。
报错内容：
ORA-26723:用户 "SYS"要求角色 "DV_STREAMS_ADMIN/DV_XSTREAM_ADMIN/DV_GOLDENGATE_ADMIN"
ORA-06512:在 "SYS.DBMS_LOGREP_UTIL", line 197
ORA-06512:在 "SYS.DBMS_LOGREP_UTIL", line 240
ORA-06512:在 "SYS.DBMS_CAPTURE_ADM_INTERNAL", line 391
ORA-06512:在 line 1
ORA-06512:在 "SYS.DBMS_CDC_PUBLISH", line 719
ORA-06512:在 "SYS.DBMS_CDC_PUBLISH", line 927
ORA-06512:在 line 2
处理办法就是关闭dba vault。
1) 关闭数据库；
2) 在所有节点上以oracle用户执行：oracle> chopt disable dv
Writing to /oracle/app/oracle/product/11.2.0/install/disable_dv.log...
/usr/bin/make -f /oracle/app/oracle/product/11.2.0/rdbms/lib/ins_rdbms.mk dv_off ORACLE_HOME=/oracle/app/oracle/product/11.2.0
/usr/bin/make -f /oracle/app/oracle/product/11.2.0/rdbms/lib/ins_rdbms.mk ioracle ORACLE_HOME=/oracle/app/oracle/product/11.2.0
同步模式中，创建变更记录表，执行报错：
ORA-31489: DDL_MARKERS值无效
ORA-06512:在 "SYS.DBMS_CDC_PUBLISH", line 1002
ORA-06512:在 line 2
处理：
ddl_markers默认是y,但同步得用n;
数据库alert日志
Logminer Bld: Done
Streams Capture: CDC$C_CDC_SCOTT_TEST CAPTURE Created
CAPTURE CDC$C_CDC_SCOTT_TEST: Start SCN: 1924579 (0x1d5de3.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: First SCN: 1924579 (0x1d5de3.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Required Checkpoint SCN: 0 (0x0000.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Captured SCN: 0 (0x0000.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Applied SCN: 0 (0x0000.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Capture Type: LOCAL
CAPTURE CDC$C_CDC_SCOTT_TEST: Logminer Id: 1
CAPTURE CDC$C_CDC_SCOTT_TEST: Source Database: ORCL.SITE
knlciAlterCapture: start scn is changed to 1925382 (0x1d6106.00000000) for CAP CDC$C_CDC_SCOTT_TEST.
Thu Feb 08 20:03:32 2018
Streams APPLY AP01 for CDC$A_CDC_SCOTT_TEST started with pid=31, OS id=13370
APPLY CDC$A_CDC_SCOTT_TEST: Apply User: CDC_PUBLISHER
APPLY CDC$A_CDC_SCOTT_TEST: Apply Tag: 0
APPLY CDC$A_CDC_SCOTT_TEST: Parameter Set by User: COMMIT_SERIALIZATION Value: NONE
APPLY CDC$A_CDC_SCOTT_TEST: Parameter Set by User: DISABLE_ON_ERROR Value: Y
APPLY CDC$A_CDC_SCOTT_TEST: Parameter Set by User: DISABLE_ON_LIMIT Value: Y
Thu Feb 08 20:03:32 2018
Streams CAPTURE CP01 for CDC$C_CDC_SCOTT_TEST started with pid=32, OS id=13372
CAPTURE CDC$C_CDC_SCOTT_TEST: Start SCN: 1925382 (0x1d6106.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: First SCN: 1924579 (0x1d5de3.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Required Checkpoint SCN: 0 (0x0000.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Captured SCN: 0 (0x0000.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Applied SCN: 0 (0x0000.00000000)
CAPTURE CDC$C_CDC_SCOTT_TEST: Capture Type: LOCAL
CAPTURE CDC$C_CDC_SCOTT_TEST: Logminer Id: 1
CAPTURE CDC$C_CDC_SCOTT_TEST: Source Database: ORCL.SITE
CAPTURE CDC$C_CDC_SCOTT_TEST: Parameter Set by User: DISABLE_ON_LIMIT Value: Y
CAPTURE CDC$C_CDC_SCOTT_TEST: Parameter Set by User: MAXIMUM_SCN Value: INFINITE
Thu Feb 08 20:03:32 2018
Streams Apply Reader for CDC$A_CDC_SCOTT_TEST started AS01 with pid=41 OS id=13374
Thu Feb 08 20:03:32 2018
Streams Apply Server for CDC$A_CDC_SCOTT_TEST started AS02 with pid=42 OS id=13376
Thu Feb 08 20:03:32 2018
Propagation Sender/Receiver (CCA) for Streams Capture and Apply CDC$A_CDC_SCOTT_TEST with pid=43, OS id=13378 started.
APPLY CDC$A_CDC_SCOTT_TEST: Source Database: NA
APPLY CDC$A_CDC_SCOTT_TEST: Applied Message Number: NA
APPLY CDC$A_CDC_SCOTT_TEST: Message Create Time: NA
First applied SCN for apply w/ object number 91923 and subscriber sequence number 1 is updated to SCN: 0 (0x0000.00000000)
First applied SCN of the Streams path from capture (CDC$C_CDC_SCOTT_TEST) to propagation () to apply (CDC$A_CDC_SCOTT_TEST) is set to SCN: 1924579 (0x1d5de3.00000000)
Streams CAPTURE CP01 for CDC$C_CDC_SCOTT_TEST with pid=32, OS id=13372 is in combined capture and apply mode.
Capture CDC$C_CDC_SCOTT_TEST is handling 1 applies.
Starting persistent Logminer Session with sid = 1 for Streams Capture CDC$C_CDC_SCOTT_TEST
LOGMINER: Parameters summary for session# = 1
LOGMINER: Number of processes = 3, Transaction Chunk Size = 1
LOGMINER: Memory Size = 30M, Checkpoint interval = 1000M
LOGMINER: SpillScn 0, ResetLogScn 1286002
LOGMINER: summary for session# = 1
LOGMINER: StartScn: 1925373 (0x0000.001d60fd)
LOGMINER: EndScn: 0
LOGMINER: HighConsumedScn: 1925382 (0x0000.001d6106)
LOGMINER: session_flag: 0x0
LOGMINER: Read buffers: 16
LOGMINER: Memory LWM: limit 10M, LWM 24M, 80%
LOGMINER: Memory Release Limit: 1M
LOGMINER: LowCkptScn: 0 (0x0000.00000000)
LOGMINER: HighCkptScn: 0 (0x0000.00000000)
LOGMINER: SkipScn: 1924579 (0x0000.001d5de3)
Thu Feb 08 20:03:39 2018
LOGMINER: session#=1 (CDC$C_CDC_SCOTT_TEST), reader MS00 pid=46 OS id=13385 sid=138 started
Thu Feb 08 20:03:39 2018
LOGMINER: session#=1 (CDC$C_CDC_SCOTT_TEST), builder MS01 pid=47 OS id=13387 sid=202 started
Thu Feb 08 20:03:39 2018
LOGMINER: session#=1 (CDC$C_CDC_SCOTT_TEST), preparer MS02 pid=48 OS id=13389 sid=15 started
LOGMINER: Begin mining logfile during dictionary load for session 1 thread 1 sequence 63, /oracle/app/oracle/fast_recovery_area/ORCL/archivelog/2018_02_08/o1_mf_1_63_f7rh2v7s_.arc