Anybody has example of setting up bi-direction streams DB replication?

Question

I am looking for a solid example of setting up bi-direction replication at database level (global), using RMAN duplicate for instantiation and possible using MAINTAIN_GLOBAL package. This will be single source in 2 databases environment. The 2 databases should be in sync. I would like to know if we need to setup tag for it as it is bi-directional. Anybody has any link to it, please let me know.
Thanks!

Answer 1

I have bidirectional going.. here's my scripts... I replicate between two machines, AMS1 and AMS2
On both machines, create the strmadmin user:
connect / as sysdba;
-- drop user strmadmin
drop user strmadmin cascade;
-- drop tablespace for streams
DROP TABLESPACE streams_tbs including contents and datafiles;
-- create tablespace for streams
CREATE TABLESPACE streams_tbs DATAFILE '/oradata2/AMS/streams_tbs_01.dbf' SIZE 100M REUSE AUTOEXTEND ON MAXSIZE UNLIMITE
D;
-- create strmadmin user
CREATE USER strmadmin IDENTIFIED BY strmadmin
DEFAULT TABLESPACE streams_tbs
QUOTA UNLIMITED ON streams_tbs;
-- grants
GRANT DBA TO strmadmin;
BEGIN
DBMS_STREAMS_AUTH.GRANT_ADMIN_PRIVILEGE(
grantee => 'strmadmin',
grant_privileges => true);
END;
SELECT * FROM dba_streams_administrator;
Next, I do all the setup (capture, propagation, apply).
The following is done on AMS1
-- supplemental logging
connect / as sysdba
alter database force logging;
alter database add supplemental log data;
-- create database link
conn / as sysdba
create public database link AMS2.ttv.com using 'AMS2.ttv.com';
connect strmadmin/strmadmin;
create database link AMS2.ttv.com connect to strmadmin identified by strmadmin;
-- setup capture queues
conn strmadmin/strmadmin
-- setup capture process to propagate to
-- ams schema downstream
begin
dbms_streams_adm.set_up_queue(
queue_table => 'cature_src_ams_tab',
queue_name => 'capture_src_to_ams_q',
queue_user => 'strmadmin');
end;
-- configure capture process
conn strmadmin/strmadmin
begin
dbms_streams_adm.add_schema_rules (
schema_name => 'ams',
streams_type => 'capture',
streams_name => 'capture_src_to_ams',
queue_name => 'capture_src_to_ams_q',
include_dml => true,
include_ddl => true,
inclusion_rule => true,
source_database => 'AMS.ttv.com');
end;
BEGIN
dbms_streams_adm.add_schema_propagation_rules (
schema_name => 'ams',
streams_name => 'prop_src_to_ams',
source_queue_name => 'capture_src_to_ams_q',
destination_queue_name => '[email protected]',
include_dml => true,
include_ddl => true,
source_database => 'AMS.ttv.com');
END;
-- set instantiation scn
conn strmadmin/strmadmin
declare
v_scn number;
begin
v_scn := dbms_flashback.get_system_change_number();
[email protected](
source_schema_name => 'ams',
source_database_name => 'AMS.ttv.com',
instantiation_scn => v_scn,
recursive => true);
end;
-- setup apply queues
conn strmadmin/strmadmin
begin
dbms_streams_adm.set_up_queue(
queue_table => 'apply_src_ams_tab',
queue_name => 'apply_src_ams_q',
queue_user => 'strmadmin');
end;
begin
dbms_streams_adm.add_schema_rules (
schema_name => 'ams',
streams_type => 'apply',
streams_name => 'apply_src_ams',
queue_name => 'apply_src_ams_q',
include_dml => true,
include_ddl => true,
source_database => 'AMS2.ttv.com');
end;
-- SET parameter disable_on_error to 'N' to continue processing row LCR even it
-- encounters errors
begin
dbms_apply_adm.set_parameter (
apply_name => 'apply_src_ams',
parameter => 'disable_on_error',
value => 'N');
end;
-- increase memopry to 50M then start capture
exec dbms_capture_adm.set_parameter('capture_src_to_ams','_SGA_SIZE','50');
exec dbms_capture_adm.start_capture (capture_name=>'capture_src_to_ams');
-- start apply processes
exec dbms_apply_adm.start_apply (apply_name=> 'apply_src_ams');
Then on AMS2:
-- supplemental logging
connect / as sysdba;
alter database force logging;
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;
-- create database link
conn / as sysdba
create public database link AMS.ttv.com using 'AMS.ttv.com';
connect strmadmin/strmadmin;
create database link AMS.ttv.com connect to strmadmin identified by strmadmin;
-- setup capture queues
connect strmadmin/strmadmin
begin
dbms_streams_adm.set_up_queue(
queue_table => 'capture_dest_ams_tab',
queue_name => 'capture_dest_to_ams_q',
queue_user => 'strmadmin');
end;
-- configure capture processes
conn strmadmin/strmadmin
begin
dbms_streams_adm.add_schema_rules (
schema_name => 'ams',
streams_type => 'capture',
streams_name => 'capture_dest_to_ams',
queue_name => 'capture_dest_to_ams_q',
include_dml => true,
include_ddl => true,
inclusion_rule => true);
end;
-- configure propagation process
begin
dbms_streams_adm.add_schema_propagation_rules (
schema_name => 'ams',
streams_name => 'prop_dest_to_ams',
source_queue_name => 'capture_dest_to_ams_q',
destination_queue_name => '[email protected]',
include_dml => true,
include_ddl => true,
source_database => 'AMS2.ttv.com');
end;
-- setup apply queues
begin
dbms_streams_adm.set_up_queue(
queue_table => 'apply_dest_ams_tab',
queue_name => 'apply_dest_ams_q',
queue_user => 'strmadmin');
end;
-- configure the apply process
begin
dbms_streams_adm.add_schema_rules (
schema_name => 'ams',
streams_type => 'apply',
streams_name => 'apply_dest_ams',
queue_name => 'apply_dest_ams_q',
include_dml => true,
include_ddl => true,
source_database => 'AMS.ttv.com');
end;
-- SET parameter disable_on_error to 'N' to continue processing row LCR even it
-- encounters errors
begin
dbms_apply_adm.set_parameter (
apply_name => 'apply_dest_ams',
parameter => 'disable_on_error',
value => 'N');
end;
-- set instantiation scn
conn strmadmin/strmadmin
declare
v_scn number;
begin
v_scn := dbms_flashback.get_system_change_number();
[email protected](
source_schema_name => 'ams',
source_database_name => 'AMS2.ttv.com',
instantiation_scn => v_scn,
recursive => true);
end;
-- increase memopry to 50M then start capture
exec dbms_capture_adm.set_parameter('capture_dest_to_ams','_SGA_SIZE','50');
exec dbms_capture_adm.start_capture (capture_name=>'capture_dest_to_ams');
-- start apply processes
exec dbms_apply_adm.start_apply (apply_name=> 'apply_dest_ams');
You can use whatever names you want, those are just what I chose for my system. The thing where I set the size to 50M is due to a bug where the LOGMINER runs out of memory.
Hope this helps!