OGG数据仓库以及单向复制（二）

1. Configure Extract（提取）      Process in Source system

   

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配置capture（捕获）参数

1. Edit extract process parameter

GGSCI (gc2) 21> EDIT PARAMS EORA_1          配置capture参数文件

-- Change Capture parameter file to capture

-- EMP_OGG and DEPT_OGG changes

EXTRACT EORA_1

SETENV (NLS_LANG=AMERICAN_AMERICA.ZHS16GBK)

USERID ogg, PASSWORD ogg

EXTTRAIL /u01/app/ogg/dirdat/aa             跟踪提取文件放在/u01/app/ogg/dirdat目录下文件名以aa为前缀的文件中：例aa000000

TABLE scott.TCUSTMER;                                   capture（捕获）要监视的表名，capture可以监视多张表也可以值监视一张表

TABLE scott.TCUSTORD;

Please note that “aa” is prefix for local trail file.

Execute the following commands in source system to add Primary Extract group.

GGSCI (gc2) 22> ADD EXTRACT EORA_1, TRANLOG, BEGIN NOW

EXTRACT added.

ADD EXTRACT EORA_1:添加EXTRACT进程，这就是一直运行，一段停止redo 里的日志就没人去抓取了

TRANLOG, BEGIN NOW：现在开始同步日志，也可以用异步，那就要另外配置

1. Define GoldenGate local trail

GGSCI (gc2) 24> ADD EXTTRAIL /u01/app/ogg/dirdat/aa,EXTRACT EORA_1, MEGABYTES 5    添加跟踪文件给EORA_1用，大小为5M

EXTTRAIL added.

1. Start primary Extract process

GGSCI (gc2) 25> START EXTRACT EORA_1    //启动进程

Sending START request to MANAGER ...

EXTRACT EORA_1 starting

Verify extract process is running or not:

GGSCI (gc2) 26>  INFO EXTRACT EORA_1

EXTRACT    EORA_1    Last Started 2014-08-11 18:57   Status RUNNING

Checkpoint Lag       00:00:00 (updated 00:00:01 ago)

Log Read Checkpoint  Oracle Redo Logs

                     2014-08-11 18:57:57  Seqno 9, RBA 2469888

表示现在读取的日志系列号是 sequence 9，RBA 2469888 发生检查点的位置，检查的发生时间和MTTR设置有关，发生检查点

就是将这个检查点之前的脏数据块通过DBWn写入数据文件中，发生检查点的位置就是RBA，一个新的纪元又开始了，这个检查点以前的都保留了

SQL> select group#,sequence#,status from v$log;

    GROUP#  SEQUENCE# STATUS

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

         1          8 INACTIVE

         2          9 CURRENT

         3          7 INACTIVE

[oracle@gc2 ~]$  ps -ef | grep ogg    查看EORA_1进程

oracle    3843  3554  0 18:57 ?        00:00:00 /u01/app/ogg/extract PARAMFILE /u01/app/ogg/dirprm/eora_1.prm REPORTFILE /u01/app/ogg/dirrpt/EORA_1.rpt PROCESSID EORA_1 USESUBDIRS

Now Goldengate will generate local tail file “aa000000” under dirdat in Source system:

[oracle@gc2 ~]$  ll /u01/app/ogg/dirdat/ 查看要跟踪的日志信息，捕获（capture)的日志信息就放在这个跟踪文件里面

total 4

-rw-rw-rw- 1 oracle oinstall 906 Aug 11 18:57 aa000000

1. Configure pump（传递）      process in source      system--------------------------------

配置传递到目标库（target)的信息

1. Edit data pump process parameter

GGSCI (gc2) 27> EDIT PARAMS PORA_1

-- Data Pump parameter file to read the local

-- trail of EMP_OGG and DEPT_OGG changes

--

EXTRACT PORA_1

SETENV (NLS_LANG=AMERICAN_AMERICA.ZHS16GBK)

PASSTHRU

RMTHOST oraclelinux54.cuug.net, MGRPORT 7809     将捕获的日志传送到目标主机oraclelinux54.cuug.net,端口7809

RMTTRAIL /u01/app/ogg/dirdat/pa

TABLE scott.TCUSTMER;

TABLE scott.TCUSTORD;

Add data pump Extract group

GGSCI (gc2) 29> ADD EXTRACT PORA_1, EXTTRAILSOURCE /u01/app/ogg/dirdat/aa

                                                                     告诉PORA_1要传送哪个路径下的跟踪信息

EXTRACT added.

Verify results:

GGSCI (gc2) 30> INFO EXTRACT PORA_1

EXTRACT    PORA_1    Initialized   2014-08-11 19:08   Status STOPPED

Checkpoint Lag       00:00:00 (updated 00:00:23 ago)

Log Read Checkpoint  File /u01/app/ogg/dirdat/aa000000

                     First Record  RBA 0

1. Add GoldenGate remote（远程）      trail in Source      system

在源数据库端配置远程的路径及文件

GGSCI (gc2) 31> ADD RMTTRAIL /u01/app/ogg/dirdat/pa, EXTRACT PORA_1, MEGABYTES 5

  表示把捕获到的信息传送到远程的哪个目录的文件中

RMTTRAIL added.

Start data pump process:

GGSCI (gc2) 32> START EXTRACT PORA_1  启动传送，一直运行

Sending START request to MANAGER ...

EXTRACT PORA_1 starting

Verify the results:

GGSCI (gc2) 33>  INFO EXTRACT PORA_1

EXTRACT    PORA_1    Last Started 2014-08-11 19:11   Status RUNNING

Checkpoint Lag       00:00:00 (updated 00:00:00 ago)

Log Read Checkpoint  File /u01/app/ogg/dirdat/aa000000

                     First Record  RBA 906

Now Goldengate will generate remote tail file “pa000000” under dirdat in Target system:

[oracle@gc2 ~]$ ll /u01/app/ogg/dirdat/

total 4

-rw-rw-rw- 1 oracle oinstall 906 Aug 11 18:57 aa000000

1. Configure replicat（复制）      process in target      system-----------------------------------------

在目标端配置怎么接收，怎么处理传过来的信息

1. Create GLOBALS parameter in target system

Edit GLOBALS(upper case) parameter file to indicate checkpoint table

GGSCI (oraclelinux54.cuug.net) 5> EDIT PARAMS ./GLOBALS

CHECKPOINTTABLE ogg.ggschkpt   用到ogg下的checkpoint表

Verify:

[oracle@oraclelinux54.cuug.net:/u01/app/ogg]$ll GLOBALS

-rw-rw-rw- 1 oracle oinstall 29 Aug 11 07:14 GLOBALS

For GLOBALS configuration take effect, we must exit GGSCI session:

GGSCI (oraclelinux54.cuug.net) 6> exit

Add replicat checkpoint table in target system:

GGSCI (oraclelinux54.cuug.net) 1> DBLOGIN USERID ogg, PASSWORD ogg      登入到目标数据库

Successfully logged into database. 

GGSCI (oraclelinux54.cuug.net) 2> ADD CHECKPOINTTABLE     把检查点信息放到这个表当中，专门存放checkpoint的表

Successfully created checkpoint table OGG.

sys@TDB112>conn ogg/ogg

ogg@TDB112>select * from tab;

TNAME                                                                                      TABTYPE                CLUSTERID

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

GGSCHKPT                                                                                      TABLE

1. Edit Delivery process parameter

Add Replicat group:

GGSCI (oraclelinux54.cuug.net) 4>ADD REPLICAT RORA_1, EXTTRAIL/u01/app/ogg/dirdat/pa

                                                                         表示从哪里提取传送过来的信息

REPLICAT added.

Edit replicat process RORA_1 parameter:

GGSCI (oraclelinux54.cuug.net) 7> EDIT PARAM RORA_1

--

-- Change Delivery parameter file to apply

-- EMP_OGG and DEPT_OGG Changes

--

REPLICAT RORA_1

SETENV (NLS_LANG=AMERICAN_AMERICA.ZHS16GBK)

USERID ogg, PASSWORD ogg

HANDLECOLLISIONS

ASSUMETARGETDEFS

DISCARDFILE ./dirrpt/RORA_aa.DSC, PURGE

MAP scott.tcustmer, TARGET scott.tcustmer;      源数据库中的哪个表，目标数据库中的哪个表接收

MAP scott.tcustord, TARGET scott.tcustord;

Note: In the MAP statement, the first owner/schema is for the source and the second for the target.

Start Replicat process: 

GGSCI (oraclelinux54.cuug.net) 8>  START REPLICAT RORA_1

Sending START request to MANAGER ...

REPLICAT RORA_1 starting

Verify:

GGSCI (oraclelinux54.cuug.net) 9>  INFO REPLICAT RORA_1

REPLICAT   RORA_1    Initialized   2014-08-11 07:20   Status STOPPED

Checkpoint Lag       00:00:00 (updated 00:07:19 ago)

Log Read Checkpoint  File /u01/app/ogg/dirdat/pa000000

                     First Record  RBA 0

1. Verify if DML can be duplicated correctly

1.  Insert      operation

Insert data in source system:

SQL> conn scott/tiger

SQL> insert into tcustmer values ('abbb','beijing','shanghao' ,'ch');    

1 row created.

SQL> commit;

Commit complete.

SQL>  select * from tcustmer;

CUST NAME                           CITY                 ST

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

WILL BG SOFTWARE CO.                SEATTLE              WA

JANE ROCKY FLYER INC.               DENVER               CO

abb  beijing                        shanghao             ch

Check the result in target system:

SQL> select * from tcustmer;

CUST NAME                           CITY                 ST

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

WILL BG SOFTWARE CO.                SEATTLE              WA

JANE ROCKY FLYER INC.               DENVER               CO

abb  beijing                        shanghao             ch