Phase 1:
Configure Oracle GoldenGate change data capture (CDC) for
MS-SQL
On the source system, we
configure the change data capture (CDC), which composed of
the primary extract, data pump extract groups, local trail
and remote trail. The primary extract group creates the
local trail, the data pump extract group routes to the
target system where the server collector creates the remote
trail. To maintain an optimized storage on the source system
(production), the source manager process is configured to
purge local trail files upon successfully routed to the
target system, waiting for phase 4 to start applying them to
the target database.
Phase 2:
Start MS SQL Server BCP export utility, out direction
While the change data capture
is running, the source database BCP utility is started to
create the data file for the tables listed on
table extracts
parameter. The data files is transported to the target
system ready for tables import. At this point the target
database tables must be available with enabled primary
and/or unique key only, leave the foreign key disabled until
the completion of the initial-load.
Phase 3:
Start MS SQL Server BCP import utility, in direction
While the change data capture
extracts continue running, run the target database BCP
utility to import the tables. We verify that the
initial-load has been completed successfully, and this is
considered to be a very crucial step before starting the
next phase. Any table import failure should be fixed and
re-run the BCP utility before proceeding with the next
phase.
Record the completion time
for the import phase and the current remote trail file
sequence number, the information is needed for disabling
collision handling.
Phase 4:
Start Oracle GoldenGate change delivery
Now, once the change data
capture has been running without interruption, and the
initial-load is verified completed and successful y using
BCP utility, it is time to start the Replicat process to
apply the transactions to the target database using the
database interface.
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Oracle GoldenGate 12c
The above is an excerpt from the upcoming
12c book
Oracle GoldenGate 12c: A Hands-on Guide to Data
Replication & Integration using Oracle & SQL Server.
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Burleson is the American Team
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