DBA _ Oracle Golden Gate 12 – Bidirectional Replication _ Activ

8/17/2019 DBA _ Oracle Golden Gate 12 – Bidirectional Replication _ Activ

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Friday, December 26, 2014

Oracle Golden Gate 12 – Bidirectional replication / Active ActiveReplication !it" #on$lict Detection and Resolution

In this document, we will see the bi-directional replication using Oracle olden ate 12 on Oracle 12c database!

In O bi directional replication, we need to understand which ob"ects are supported and which are not!

a ! #rimary $ey

% #rimary $ey is used to identi&y and resol'e con&licts! (a)e sure e'ery table to be included in the replication has a #rimary $ey!

b! *e+uences are not supported in i-Directional eplication! .e must deploy one o& the methods below to o'ercome it!

i! ODD/

ii! %

iii!3O3%%

c! rigger causes uni+ueness issues! .e must do the &ollowing to o'ercome them!

i! .e must disable the triggers on the target or use O to suppress them!

ii! *peci&y the DO#IO* *5##**I* parameter in tract parameter &ile when using oldenate 'ersion 10!2!0!4 or

11!2!0!2 or 12!1!2!1

d! Data 7ooping

In a i-Directional replication con&iguration, each side processes transaction acti'ely! For Insert transactions it can cause uni+ueness

issues and &or updates it can spawn into an in&inite loop!

o a'oid data looping speci&y the &ollowing parameters should be used in tract process, on both databases!

%7OO#IO* 8375D5* 9:5*;

O

%7OO#IO* 8375D5* 9oracle:uid;

e! 53% able

runcate table operations are not detected by data looping! .e must t runcate tables only in one database! .e can accomplish it by

one o& the &ollowing ways<

i! 3ontrol user access using pri'ileges so that they can truncate tables only in one direction!

O

ii! *peci&y the parameter =G%&&R'(#A&%> &rom source to target and = )G(OR%&R'(#A&%* &rom target to source!

&! 7%

Oracle oldenate is an %synchronous solution! It is possible that there may be 7% at times depending on the transaction 'olume or

networ) issue or when processes are down! his 7% can cause data inconsistencies! o a'oid this situation ma)e sure that there is

'ery little or no 7% or ha'e proper *7%s!

g ! O 3OF7I3*

3on&licts are 'ery common and born to happen in i-Directional eplication as Oracle oldenate is an %synchronous solution!

.e will see the &ollowing &our di&&erent con&licts in O replication!

i! 3OF7I3 FO I**

ii! 3OF7I3 FO 5#D%*

iii! 3OF7I3 FO D7*

i'! 3OF7I3 FO 5#D%/D7

h! imestamp 3olumn

% #rimary $ey alone is O su&&icient to handle con&licts! .e must use another column or combination o& columns to handle con&licts! % imestamp column stores the commit time o& the D(7! his column can be populated with the help o& %pplication or a rigger! .e

will ma)e use o& timestamp column along with the #rimary $ey column to identi&y and resol'e con&licts!

(a)e sure e'ery table part o& replication ha'e a column with timestamp or date data type!

i! 3on&lict Detection %nd esolution

*tart with O 'ersion 11!2, Oracle has pro'ided built-in 3Ds! hese built-in 3Ds can be used in O 11!2! .e will use

=R%SO+,%#O(-+)#&> parameter o& (%# statement to resol'e con&licts !

?! 7imitations

i-Directional eplication wor)s only on .indows, 5I8/7inu!

3D wor)s with numeric, date/timestamp colums and char/'archar2 only!

%3@*A7 is not supported in i-Directional eplication!

7O , %bstract data type B%DC and 5ser De&ined data type B5DC are O supported with 3D!

4! IO( D%I7**ource

*er'er I#< 10!10!1!10

Database ame< ggsource

Database ersion< 12!1!0!2!1

'ersion< 12!1!2!1!0

Searc" &"is Blo.

San deep

Follow 6

iew my complete

About e

201E B1C

2014 B46C

December B1C

Oracle olden ate 12 Gidirectional replication !!!

*eptember B?C

%ugust B1C

Huly B4C

Hune B14C

(ay B2?C

Blo. Arc"ive

@ome

*cripts

Oracle Database

ac)up andeco'ery

0a.es

(ore et log


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Target

Server IP : 10.10.1.20

Database Name: ggtarget

Database Version: 12.1.0.2.1

GG version: 12.1.2.1.0

1. Login to edelivery.oracle.com Select te !rod"ct and version.

2. Do#nload GoldenGate V 12.1.2.1.0

$. %n bot so"rce and target servers& create directories to store te Golden gate.

'oracle(T)ST01 "02*+ m,dir -! "02a!!oracle!rod"ctgg

'oracle(T)ST01 "02*+ cmod // "02a!!oracle!rod"ctgg

'oracle(T)ST02 "02*+ m,dir -! "02a!!oracle!rod"ctgg

'oracle(T)ST02 "02*+ cmod // "02a!!oracle!rod"ctgg

. Transer and "n3i! te installable do#nloaded.

'oracle(T)ST01 "02*+ cd "02a!!oracle!rod"ctgg

'oracle(T)ST01 gg*+ "n3i! V445.3i!

'oracle(T)ST02 "02*+ cd "02a!!oracle!rod"ctgg

'oracle(T)ST02 gg*+ "n3i! V445.3i!

. 6ntar te tar ile.

4. 7reate a directory or !lacing te discard iles.

'oracle(T)ST01 gg*+ m,dir discard

'oracle(T)ST02 gg*+ m,dir discard

/. Set "! te !at or Golden gate in .bas8!roile

e9!ort LD8LI;


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9. Now, let us prepare database for Golden Gate replication.

Login to the database with user having ALTER SSTE! privileges"

a# $e need to put the database in archivelog %ode b& starting the database in %ount %ode.

S'L( startup %ount

)RA*LE instance started.

Total S&ste% Global Area +-9/0 b&tes

1i2ed Si3e 4945-64 b&tes

7ariable Si3e 909059/+4 b&tes

8atabase uffers 5/++4 b&tes

Redo uffers +/0056 b&tes

8atabase %ounted.

b# S'L( alter database archivelog"

8atabase altered.

c# )pen the database

S'L( alter database open"

8atabase altered.

d# S'L( alter database add supple%ental log data"

8atabase altered.

e# Now, we need to ensure redo and archive logs are having supple%ental log data.

f# Now, switch the log files.

S'L( alter s&ste% switch logfile"

g# *onfir% fro% the database whether supple%ental logging is enabled.

S'L( select S:;;LE!ENTAL

create user gg


4/14

ou will be pro%pted for the na%e of a sche%a for the )racle GoldenGate database obects.

N)TEH 1or an )racle +-g source, the s&ste% rec&cle bin %ust be disabled. 1or )racle ++g and later, it can be enabled.

N)TEH The sche%a %ust be created prior to running this script.

N)TEH Stop all 88L replication before starting this installation.

Enter )racle GoldenGate sche%a na%eHgg_admin

$orBing, please wait ...

Spooling to file ddl


5/14

???????????????????????????????????????? ?????????????????????????????????????????????????????????????????

No errors No errors

SS.88L*TJ=N1) ;A*IAGE )8 STAT:SH

Line@pos Error

???????????????????????????????????????? ?????????????????????????????????????????????????????????????????

No errors No errors

88L K=ST)R TALE

???????????????????????????????????

)I

88L K=ST)R TALED+#

???????????????????????????????????

)I

88L 8:!; TALES

???????????????????????????????????

)I

88L 8:!; *)L:!NS

???????????????????????????????????

)I

88L 8:!; L)G GR):;S

???????????????????????????????????

)I

88L 8:!; ;ART=T=)NS???????????????????????????????????

)I

88L 8:!; ;R=!AR IES

???????????????????????????????????

)I

88L SE':EN*E

???????????????????????????????????

)I

GGS


6/14

Script complete.

SQL> @role_setup.sql

GGS Role setup script

This script will drop and recreate the role GGS_GGSUSER_ROLE

To use a different role name, quit this script and then edit the params.sql script to change the gg_role parameter to the preferred

name. (Do not run the script.

!ou will "e prompted for the name of a schema for the GoldenGate data"ase o"#ects.

$%T&' The schema must "e created prior to running this script.

$%T&' Stop all DDL replication "efore starting this installation.

&nter GoldenGate schema name'gg_admin

rote file role_setup_set.t)t

*L+SQL procedure successfull completed.

Role setup script complete

Grant this role to each user assigned to the &)tract, GGS-, and /anager processes, " using the following SQL command'

GR0$T GGS_GGS1S&R_R%L& T% 2logged1ser3

where 2logged1ser3 is the user assigned to the GoldenGate processes.

4444444SQL3 GRANT GGS_GGSUSER_ROLE TO gg_admin;

Grant succeeded.

SL> @ddl_ena!le.sql

Trigger altered.

56. $ow, to set up "i4directional replication, we need the following.

%n Site GGS%1R-&, we will ha7e the following groups created

8 &)tract 9 e)t5

8 Data *ump 9 dpump5

8 Replicat 9 rep5

%n Site GGT0RG&T, we will ha7e the following groups created

8 &)tract 9 e)t:

8 Data *ump 9 dpump:

8 Replicat 9 rep:

%n Site GGS%1R-&, we ha7e the following trails set up

8 aa 9 local e)tract trail which w ill "e written to " e)t5

8 a" 9 remote trail which will "e processed " data pump e)tract group dpump5. This will "e shipped o7er the networ; to Site

GGT0RG&T

%n Site GGT0RG&T, we ha7e the following trails set up

8 ac 9 local e)tract trail which will "e written to " e)t:

8 ad 9 remote trail which will "e processed " data pump e)tract group dpump:. This will "e shipped o7er the networ; to Site

GGS%1R-&

5 and create a ta"le under GG>.

%n source and target, create a user as "elow.

SQL3 create user gg"i identified " gg"i?

%n Source and target data"ase, create a ta"le GG&/* under GG>.

SQL3 create ta"le ggemp

(emp_id num"er,

emp_name_name 7archar:(:@,

mgr num"er,

last_dml timestamp default sstimestamp?

SQL3 alter ta"le ggemp add constraint p;_ggemp primar ;e (emp_id ?

Ta"le altered.

SQL3 grant all on ggemp to gg_admin?

Grant succeeded.

SQL3 -R&0T& %R R&*L0-& TRGG&R GG&/*_-DR_TRG

>&=%R& 1*D0T& or insert

%$ GG>.GG&/*


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REFERENCING NEW AS New OLD AS Old

FOR EACH ROW

BEGIN

IF SYS_CONTEXT ('USERENV', 'SESSION_USER') ! 'GG_ADIN'

THEN

"NEW#LAST_DL " SYSTIESTA$%

END IF%

END%

&

# Ce*+e +e e-+*.+ (EXT) */d d*+* 0120 (D$U$) 3/ S4+e GGSOURCE

GGSCI (TEST5) 6 *dd e-+*.+ e-+ +*/l37 8e74/ /3w

EXTRACT *dded#

GGSCI (TEST5) 96 *dd e-++*4l &15:&*00&3*.le&03d1.+&77&d4d*+&** e-+*.+ e-+

EXTTRAIL *dded#

GGSCI (TEST5) ;6 *dd e-+*.+ d0120 e-++*4lEYINCLUDING (e20_/*2e_/*2e,27,l*EYINCLUDING (e20_/*2e_/*2e,27,l*


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EXTRACT dpump2

USERID gg_admin, PASSWORD gg_admin

RMTHOST 10.10.1.10, MGRPORT !0", TCP#U$SI%E 100000

RMTTRAI& 'u02'app'()a*+'p)(du*-'gg'di)da-'ad

PASSTHRU

TA#&E ggi.ggmp/

1!. On GGSOURCE i-, add )p+i*a- REP1

GGSCI TEST01 !3 add )p+i*a- )p1 4--)ai+ 'u02'app'()a*+'p)(du*-'gg'di)da-'adREP&ICAT addd

GGSCI TEST02 "3 di- pa)am )p1

REP&ICAT )p1

ASSUMETARGETDE$S

USERID gg_admin, PASSWORD gg_admin

DISCARD$I&E 'u02'app'()a*+'p)(du*-'gg'di*a)d'di*a)d)p1.-4-, appnd,

MAP ggi.ggmp, TARGET ggi.ggmp/

1". On (-5 GGSOURCE and GGTARGET i- , add -)anda-a .

GGSCI TEST01 123 dblogin userid gg_admin,password gg_admin

Su**6u++7 +(ggd in-( da-aa.

GGSCI TEST01 a gg_admin8gg(u)* 193 add trandata ggbi.ggemp *(+mp_nam_nam,mg),+a-_dm+

&(gging (6 upp+mn-a+ )d( da-a na+d 6() -a+ GG#I.GGEMP.

TRA:DATA 6() *5du+ing *(+umn 5a n addd (n -a+ ;GG#I.GGEMP;.

GGSCI TEST01 a gg_admin8gg(u)* 1()d gg_admin

Su**6u++7 +(ggd in-( da-aa.

GGSCI TEST02 a gg_admin8gg-a)g- 113 add -)anda-a ggi.ggmp *(+mp_nam_nam,mg),+a-_dm+

&(gging (6 upp+mn-a+ )d( da-a na+d 6() -a+ GG#I.GGEMP.

TRA:DATA 6() *5du+ing *(+umn 5a n addd (n -a+ ;GG#I.GGEMP;.GGSCI TEST02 a gg_admin8gg-a)g- 123 in6( -)anda-a ggi.ggmp

&(gging (6 upp+mn-a+ )d( +(g da-a i na+d 6() -a+ GG#I.GGEMP.

C(+umn upp+mn-a++7 +(ggd 6() -a+ GG#I.GGEMP= EMP_ID, EMP_:AME_:AME, &AST_DM&, MGR.

20. S-a)- -5 E4-)a*- and Da-a Pump p)(* in GGSOURCE

GGSCI TEST01 a gg_admin8gg(u)* 1?3 start extract ext1

Snding START )@u- -( MA:AGER ...

EXTRACT EXT1 -a)-ing

GGSCI TEST01 a gg_admin8gg(u)* 13 start extract dpump1

Snding START )@u- -( MA:AGER ...

EXTRACT DPUMP1 -a)-ing

GGSCI TEST01 a gg_admin8gg(u)* 1!3 info extract ext1

EXTRACT EXT1 &a- S-a)-d 2019111 2B=B< S-a-u RU::I:G

C5*p(in- &ag 00=00=00 upda-d 00=00=09 ag(

P)(* ID B0100

&(g Rad C5*p(in- O)a*+ Rd( &(g

2019111 2B=B

&(g Rad C5*p(in- $i+ 'u02'app'()a*+'p)(du*-'gg'di)da-'aa000000

$i)- R*()d R#A 0


9/14

GGSCI (TEST01 as gg_admin@ggsource) 20> info all

Program Status Grou !ag at C"#t Time Since C"#t

$%&%GE' '&&I&G

ET'%CT '&&I&G *P$P1 00+00+00 00+00+00

ET'%CT '&&I&G ET1 00+00+00 00+00+01

'EP!IC%T ST,PPE* 'EP1 00+00+00 00+00+--

21. Start t"e E/tract and *ata Pum rocess in GGT%'GET

GGSCI (TEST02 as gg_admin@ggtarget) 1> start e/tract e/t2

Sending ST%'T reuest to $%&%GE' ...

ET'%CT ET2 starting

GGSCI (TEST02 as gg_admin@ggtarget) 1-> start e/tract dum2


ET'%CT *P$P2 starting

GGSCI (TEST02 as gg_admin@ggtarget) 1> info all


$%&%GE' '&&I&G

ET'%CT '&&I&G *P$P2 00+00+00 00+1+3

ET'%CT '&&I&G ET2 00+00+00 00+00+00'EP!IC%T ST,PPE* 'EP2 00+00+00 00+14+21

22. ,n GGS,'CE5 start t"e relicat ('EP1) rocess.

GGSCI (TEST01 as gg_admin@ggsource) 2> start relicat re1


'EP!IC%T 'EP1 starting

GGSCI (TEST01 as gg_admin@ggsource) 2-> info all


$%&%GE' '&&I&G

ET'%CT '&&I&G *P$P1 00+00+00 00+00+03

ET'%CT '&&I&G ET1 00+00+00 00+00+06'EP!IC%T '&&I&G 'EP1 00+00+00 00+00+0-

2. ,n GGT%'GET 5 add c"ec#ointta7le and start t"e relicat ('EP2) rocess .

GGSCI (TEST02 as gg_admin@ggtarget) 22> add checkpointtable gg_admin.ckptab

Successfull8 created c"ec#oint ta7le gg_admin.c#ta7.

GGSCI (TEST02 as gg_admin@ggtarget) 2> start relicat re2


'EP!IC%T 'EP2 starting

GGSCI (TEST02 as gg_admin@ggtarget) 2-> info all


$%&%GE' '&&I&G

ET'%CT '&&I&G *P$P2 00+00+00 00+00+04

ET'%CT '&&I&G ET2 00+00+00 00+00+0

'EP!IC%T '&&I&G 'EP2 00+00+00 00+00+02

Test Scenario 1

,n GGS,'CE5 inserted a ro9 and found t"at t"e ro9 is relicated on GGT%'GET.

S:!> select name from ;


10/14

SQL> select * from ggemp;

EMP_ID EMP_NAME_NAME MGR LAST_DML

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

1 gole!g"te 1## 1$-N%&-1' 11()#('(+),' PM

SQL> select !"me from ./"t"0"se;

NAME

---------GGTARGET



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

1 gole!g"te 1## 1$-N%&-1' 11()#('(+),' PM

Test Sce!"ro

%! GGTARGET2 3e "re !sert!g " ro3 2 t4s ro3 s4o5l 0e replc"te o! GGS%6R7E(

SQL> !sert !to ggemp ."l5es 829or"cle921#12s:s"te;

1 ro3 cre"te(

SQL> commt;

7ommt complete(



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

1 gole!g"te 1## 1$-N%&-1' 11()#('(+),' PM

or"cle 1#1 1$-N%&-1' 11()#())(,#, select * from ggemp;


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

1 gole!g"te 1## 1$-N%&-1' 11()#('(+),' PM

or"cle 1#1 1$-N%&-1' 11()#())(,#,


11/14

RESOLVECONFLICT – This will be used in MAP statement to different resolutions for different conflict resolutions.

In our setup, we have 2 databases ( GG!"#$% and GGTA#G%T &and we need to have the chan'es to be replicated from

both the sites.

ata Pump and %)tract Trail file setup remains same as per the setup for Active*Active replication without $#.

On GGSOURCE

+. The e)tract (%T+& parameter file will be follows.

GG$I (T%T-+& / edit params e)t+%T#A$T e)t+

"%#I ''0admin, PA1!# ''0admin

%TT#AI 3u-23app3oracle3product3''3dirdat3aa

T#A4!G!PTI!4 %$"%"%# ''0admin

TA5% ''bi.''emp,

G%T5%6!#%$! (

!4 "PAT% 7%8I4$"I4G (emp0name0name,m'r,last0dml&,

!4 %%T% 7%8I4$"I4G (emp0name0name,m'r,last0dml&&9

2. The #eplicat process on GG!"#$% server will be as follows.

GG$I (T%T-+& :/ edit params rep+

#%PI$AT rep+

A"M%TA#G%T%6

"%#I ''0admin, PA1!# ''0admin

I$A#6I% 3u-23app3oracle3product3''3discard3discardrep+.t)t, append,

MAP ''bi.''emp, TA#G%T ''bi.''emp,

$!MPA#%$! (!4 "PAT% A, !4 %%T% A&,

#%!;%$!46I$T ("PAT%#!1%IT, (%6A"T, "%MA (M0TIM%TAMP&&&,#%!;%$!46I$T (I4%#T#!1%IT, (%6A"T, "%MA (M0TIM%TAMP&&&,

#%!;%$!46I$T (%%T%#!1%IT, (%6A"T, IG4!#%&&,

#%!;%$!46I$T ("PAT%#!1MII4G, (%6A"T, !;%#1#IT%&&,

#%!;%$!46I$T (%%T%#!1MII4G, (%6A"T, I$A#&&9

On GGTARGET

row missin', then overwrite or an> row is missin', it should discard while deletin'.

Test Scenario 3

et us update the row from both GG!"#$% and GGTA#G%T with different values and see the latest values are updated.

!n GGTA#G%T, I am updatin' the MG# column from +-? to +-@ and in GG!"#$%, I am updatin' from +-? to +- at same time,

the values in both the database should be +-@ as GGTA#G%T is havin' latest timestamp.

!n GG!"#$%,

B/ select C from ''emp9

%MP0I %MP04AM%04AM% MG# AT0M

********** ******************** ********** ***************************************************************************

+ 'olden'ate +-- +*4!;*+= ++.-.2=.?:=2@ PM

2 oracle +-2 +@*4!;*+= -.+=.2+.=-=+2 PM

< ''test +-? +@*4!;*+= -?.-?.=.?:+: PM


12/14

SQL> update ggemp set mgr=108 where emp_id=3;

1 row updated.

SQL> commit;

Commit complete.

O !!"#$!%"

SQL> select & 'rom ggemp;

%()_*+ %()_,#(%_,#(% (!$ L#S"_+(L

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

1 goldegate 100 1-,O/-1 11.0.2.428 )(

2 oracle 102 18-,O/-1 0.1.21.012 )(

3 ggtest 10 18-,O/-1 0.0..414 )(

SQL> update ggemp set mgr=108 where emp_id=3;

1 row updated.

SQL> commit;

Commit complete.

$esult

,ow5 the output o' !!SO6$C% ad !!"#$!%" shows the 'ollowig.


%()_*+ %()_,#(%_,#(% (!$ L#S"_+(L

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

1 goldegate 100 1-,O/-1 11.0.2.428 )(

2 oracle 102 18-,O/-1 0.1.21.012 )(

3 ggtest 108 18-,O/-1 0.0.3.34242 )(

"est Sceario

,ow5 * am goig to delete same record 'rom 7oth the sites.

a. *itiall5 * am deletig 'rom !!SO6$C% ad !!"#$!%" at same time ad commitig.

O !!SO6$C%


%()_*+ %()_,#(%_,#(% (!$ L#S"_+(L

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

1 goldegate 100 1-,O/-1 11.0.2.428 )(

ggoracle 110 18-,O/-1 0.2.20.4314 )(

3 ggtest 108 18-,O/-1 0.0.3.34242 )(

SQL> delete 'rom ggemp where emp_id=;

1 row deleted.

SQL> commit;

Commit complete.

O !!"#$!%"

SQL> delete 'rom ggemp where emp_id=;

1 row deleted.

SQL> commit;

,ow5 sice !!SO6$C% timestamp is proceeded earlier ad deleted the record5 the other delete statemet ' rom !!"#$!%" got

discarded.

"his ca 7e see i the trail ' ile.

Operatio9 3 %rror9 103

Operatio 'ailed at se:o 0 r7a 330

+iscardig record o C+$ +*SC#$+ resolutio

$ecord ot 'oud

Aborted delete from GGBI.GGEMP to GGBI.GGEMP (target format)...

&

%()_*+ =

0000009 3

%()_,#(%_,#(% = ggoracle


13/14

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Posted by San deep at 3:31 AM

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6 comments:

Murthy une $*+ $1% at !:*$ AM

Hi

Ha,e you per#ormed -nitial load be#ore t.e abo,e steps or you .a,e cloned source database to tar'et .as your initial load/

i am 'ettin' error in my tar'et side statin' table doesnot e0ist and replicat is 'ettin' abended

- remember in 11 ,ersion 'olden 'ate e did initial load #irst be#ore started our processes

2indly con#irm

eply

suraj September !+ $1% at ":1% PM

Hi Murt.y+

Can you tell me w.at operation on source you are per#ormin'/

eply

Murthy September 1!+ $1% at 11:4 AM

-ts 'oin' to be acti,e acti,e e will be doin' 5M6 operations Mostly -nserts

eply

Joseph A. Wallace October 1+ $1% at 11:1! AM

-t was so nice article- was really satisi#ied by seein' t.is article and we are also 'i,in' Oracle online trainin'7.e Oracle online

trainin' is one o# t.e best Oracle online trainin' institute in 8SA

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Cat Minds October 1+ $1% at 11:$% AM

eply

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