OGG數據倉庫以及單向復制（二）

1. Configure Extract（提取）      Process in Source system

配置capture（捕獲）參數

1. Edit extract process parameter

GGSCI (gc2) 21> EDIT PARAMS EORA_1          配置capture參數文件

-- 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             跟蹤提取文件放在/u01/app/ogg/dirdat目錄下文件名以aa為前綴的文件中：例aa000000

TABLE scott.TCUSTMER;                                   capture（捕獲）要監視的表名，capture可以監視多張表也可以值監視一張表

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進程，這就是一直運行，一段停止redo 里的日志就沒人去抓取了

TRANLOG, BEGIN NOW：現在開始同步日志，也可以用異步，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    添加跟蹤文件給EORA_1用，大小為5M

EXTTRAIL added.

1. Start primary Extract process

GGSCI (gc2) 25> START EXTRACT EORA_1    //啟動進程

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

表示現在讀取的日志系列號是 sequence 9，RBA 2469888 發生檢查點的位置，檢查的發生時間和MTTR設置有關，發生檢查點

就是將這個檢查點之前的臟數據塊通過DBWn寫入數據文件中，發生檢查點的位置就是RBA，一個新的紀元又開始了，這個檢查點以前的都保留了

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進程

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/ 查看要跟蹤的日志信息，捕獲（capture)的日志信息就放在這個跟蹤文件里面

total 4

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

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

配置傳遞到目標庫（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     將捕獲的日志傳送到目標主機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

                                                                     告訴PORA_1要傳送哪個路徑下的跟蹤信息

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（遠程）      trail in Source      system

在源數據庫端配置遠程的路徑及文件

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

  表示把捕獲到的信息傳送到遠程的哪個目錄的文件中

RMTTRAIL added.

Start data pump process:

GGSCI (gc2) 32> START EXTRACT PORA_1  啟動傳送，一直運行

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（復制）      process in target      system-----------------------------------------

在目標端配置怎么接收，怎么處理傳過來的信息

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      登入到目標數據庫

Successfully logged into database. 

GGSCI (oraclelinux54.cuug.net) 2> ADD CHECKPOINTTABLE     把檢查點信息放到這個表當中，專門存放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

                                                                         表示從哪里提取傳送過來的信息

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;      源數據庫中的哪個表，目標數據庫中的哪個表接收

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