Oracle is the most powerful DBMS in the world. However, Oracle's expensive and complex replication makes it difficult to build highly available applications or move data in real-time to data warehouses and popular databases like MySQL. In this webinar you will learn how Continuent Tungsten solves problems with Oracle replication at a fraction of the cost of other solutions and with less management overhead too – think "Oracle GoldenGate without the price tag!" We will demo constructing a highly available site using Oracle-to-Oracle replication. We will then show you how to replicate data in real time from Oracle to MySQL as well as load a data warehouse.

1. Replicate Oracle to Oracle,
Oracle to MySQL ,
and Oracle to Analytics
Linas Virbalas, Senior Software Engineer
Robert Hodges, CEO
©Continuent 2014

2. Introducing Continuent
•
The leading provider of clustering and
replication for open source DBMS
•
Our Product: Continuent Tungsten
• Clustering - Commercial-grade HA, performance
scaling and data management for MySQL
• Replication - Flexible, high-performance data
movement
©Continuent 2014
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3. What is Tungsten Replicator?
Tungsten Replicator:
a high-performance
open source database
replication engine
!
GPL V2 license - 100% open source
Download from https://code.google.com/p/tungsten-replicator/
Annual support subscription available from Continuent
® without the Price Tag”
“GoldenGate
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4. Tungsten Replicator Overview
Master
Download
transactions
via network
DBMS
Logs
Slave
Replicator
(Transactions + Metadata)
Replicator
Apply using JDBC
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THL
THL
(Transactions + Metadata)
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5. Tungsten Replication Service
Pipeline
Stage
Extract Filter
Master
DBMS
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Stage
Apply
Extract Filter
Transaction
History Log
Stage
Apply
Extract Filter
Queue
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Apply
Slave
DBMS

6. Filters and Parallel Apply
Pipeline
Stage
Extract Filter
Master
DBMS
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Stage
Stage
Apply
Extract Filter
Transaction
History Log
Apply
Extract Filter
Extract Filter
Extract Filter
In-Memory
Queue
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Apply
Apply
Apply
Slave
DBMS

7. Multiple Services per Replicator
Replicator
Service
frommysql
Replicator
frommysql
fromoracle
Aggregated
Service
fromoracle
Replicator
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8. master-slave
MySQL
Oracle
fan-in slave
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Oracle
MySQL
all-masters
Heterogeneous
Oracle
MySQL
Oracle
star
MySQL

9. Heterogeneous
Replication
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10. Steps to Heterogeneous Replication
1. Prepare (translate) schema for
the slave DBMS
2. Set up replication
ddlscan
tpm
3. Provision initial data
MySQL Blackhole Parallel Apply
Parallel Extract
4. Continue real-time replication
Tungsten Replicator
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11. Replicating from
MySQL to Oracle
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12. Use Case: Real-Time Sales/Order
Fulfillment
Web-based Sales
~1M
Xacts/
Day
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Purchase Ordering
Real-Time Replication
3M
Order
Items

13. 1. Translating schema
for the slave
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14. Translating Schema
•
Goal - set up heterogeneous replication
Replication
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15. Translating Schema
•
Beginning - how to convert tables?
empty
Tables
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16. Translating Schema
•
Beginning - how to convert tables?
empty
•Data types?
•Column lengths?
•Naming conventions?
•Reserved words?
Tables
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17. Translating Schema
•
ddlscan automates these conversions
ddlscan
Tables
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empty

18. ddlscan
•
•
•
•
©Continuent 2014
Part of Tungsten Replicator, GPL v2
Translates schema with replication in mind
Provides errors and warnings
Can rename schema/tables/columns
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19. Usage (MySQL to Oracle Example)
$ cd tungsten-replicator/bin
!
$ ./ddlscan
-db test
-template ddl-mysql-oracle.vm
-user tungsten
-pass secret
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20. Translating Schema
•
ddlscan looks into source schema
empty
Tables
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21. Translating Schema
•
ddlscan translates and renders DDL commands
empty
Tables
oracle-ddl.sql
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22. Result of ddlscan
CREATE TABLE 3colors
/* ERROR: table starts with a number, use rename option and a
filter */
(
id NUMBER(10, 0),
color VARCHAR2(1) /* ENUM('R','G','B') */,
enabled NUMBER(1) /* BIT(1) - no constraints for 0 or 1 */,
acolumnthatdoesntfittooracleat NUMBER(10, 0)
/* WARN: truncated column name exceeding 30 characters
(acolumnthatdoesntfittooracleatall) */
!
/* ERROR: table must have a primary key! */
);
!
CREATE TABLE talks
...
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23. Translating Schema
•
You run resulting SQL file on Oracle
empty
Tables
oracle-ddl.sql
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24. Translating Schema
•
Tables are ready!
Tables
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Translated
tables (empty)
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25. 2. Set Up Replication
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26. Replicator Installation
./tools/tpm configure my_ora
--enable-heterogenous-service=true
--install-directory=/opt/mysql_to_ora/continuent
--members=alpha,bravo
--master=alpha
!
./tools/tpm configure my_ora --hosts=alpha
--replication-user=tungsten
--replication-password=secret
!
./tools/tpm configure my_ora --hosts=bravo
--replication-user=tungsten_frommysql
--replication-password=secret
--datasource-type=oracle
--datasource-oracle-service=ORCL
--svc-applier-filters=dropstatementdata
!
./tools/tpm install my_ora
!
./tools/tpm start my_ora
!
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27. Replication Under the Hood
MySQLExtractor
OracleApplier
Tungsten Master
Replicator
Service
my_ora
MySQL
Binlog
binlog_format=row
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Tungsten Slave
Replicator
Service
my_ora
MySQLExtractor
Special Filters
• Transform
ENUM to string
• Transform SET
to string
• Column names
and signed flag
Special Filters
• Drop DDL
• Map names to upper case
• Rename too long or reserved
objects
• Optimize updates to remove
unchanged columns
• Ignore extra tables
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28. 3. Provisioning an
Oracle slave
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29. Provisioning (2)
ddlscan
table structure
table structure
table data
table structure
table data
table data
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table structure
table structure
table structure

30. Provisioning (3)
MySQL Sandbox
table structure
table structure
table data
table structure
table data
table data
table structure
table structure
table structure
CONVERT to
BLACKHOLE
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31. Provisioning (4)
not replicating
MySQL Sandbox
table structure
table structure
table data
table structure
table data
table data
backup
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32. Provisioning (5)
(ROW)
backup
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Master
Tungsten
Replicator
THL
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4
bin
logs
1
2
3
MySQL
Sandbox
Slave
Tungsten
Replicator

33. 4. Continue Real-Time
Replication
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34. Provisioning (6)
MySQL Sandbox
table structure
table structure
table data
table structure
table data
table data
Master
Tungsten
Replicator
bin
logs
THL
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Slave
Tungsten
Replicator

35. Replicating from
Oracle to MySQL
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36. Use Case: Web Content Publishing
Backend Office
Web-Based Catalog
Real-Time Publication
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37. How Does Tungsten Do That?
OracleCDCExtractor
MySQLApplier
Tungsten Master
Replicator
Tungsten Slave
Replicator
Service
ora_my
Service
ora_my
OracleCDCExtractor
No Special Filters
demo
schema
demo_pub
schema
Oracle CDC
(Synchronous or
Async Hotlog)
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Special Filters
• Map names to lower case
• Ignore extra tables
• Heartbeat table renaming

38. Replicating from
Oracle to Oracle
©Continuent 2014

39. How Does Tungsten Do That?
OracleCDCExtractor
OracleApplier
Tungsten Master
Replicator
Tungsten Slave
Replicator
Service
ora_ora
Service
ora_ora
OracleCDCExtractor
No Special Filters
demo
schema
demo_pub
schema
Oracle CDC
(Synchronous or
Async Hotlog)
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Special Filters
No Special Filters

40. DEMO
DEMO.*
DEMO2.*
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demo.*
demo2.*

41. Replicating from
Oracle to Vertica
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42. Use Case: Web Content Publishing
Backend Office
Analytic Reports
Near Real-Time
Publication
Feeds from other data sources
©Continuent 2014

43. How Does Tungsten Do That?
OracleCDCExtractor
SimpleBatchApplier
Tungsten Master
Replicator
Tungsten Slave
Replicator
Service
ora_ver
Service
ora_ver
OracleCDCExtractor
No Special Filters
demo
schema
demo_pub
schema
Oracle CDC
(Synchronous or
Async Hotlog)
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Special Filters
• Map names to lower case
• Ignore extra tables
• Rename data tables (if required)

44. Batch Loading--The Gory Details
Replicator
Transactions
from master
Service ora_ver
COPY to
stage tables
CSV
CSV
CSV
Files
Files
Files
Merge
Script
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(or)
COPY
directly to
base tables
Staging
Staging
Staging
Tables
Tables
Tables
SELECT to
base tables
Base
Base
Base
Tables
Tables
Tables

45. DEMO
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46. Coming
Attractions
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47. New Replication Features in 2014
•
•
©Continuent 2014
Parallel extraction for fast provisioning
•
•
•
Select data as of specific SCN
Pull data across in multiple streams
Matches parallel apply on slave side
!
Hadoop data loading
•
•
•
Direct loading from MySQL/Oracle to HDFS
View data using Hive
Generation of materialized views
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48. 560 S. Winchester Blvd., Suite 500
San Jose, CA 95128
Tel +1 (866) 998-3642
Fax +1 (408) 668-1009
e-mail: sales@continuent.com
Our Blogs:
http://flyingclusters.blogspot.com
http://scale-out-blog.blogspot.com
http://datacharmer.blogspot.com
http://continuent-tungsten.blogspot.com
Continuent Web Page:
http://www.continuent.com
!
Documentation:
https://docs.continuent.com
!
Tungsten Replicator:
http://code.google.com/p/tungsten-replicator
©Continuent 2014
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