1. Intro to
Talend Open Studio
for
Data Integration
Philip Yurchuk
http://philip.yurchuk.com

2. What is Talend?
 Eclipse-based visual
programming editor
 Generates executable Java code
 Jobs can run standalone or
embedded (no special server)
 Batch or interactive (user input)

3. What is ETL?
 Extract: suck up data
 Transform: mess with it
Load: blow it out
Batch, integration, mi
gration, etc.

4. Extract from/load to where?
 Over 600 components
 Over 450 connectors
 Allows multiple
inputs/outputs in single job

5. Connectors
 Flat files
 Applications/Platforms
 Delimted (tab, CSV…)
 Alfresco
 XML
 Microsoft Dynamics
 JSON
 Excel
 Positional
 Apache HTTP
logs, HL7...
(CRM, AX)
 SAP
 Sage ERP X3
 Salesforce
 SugarCRM

6. Connectors (continued)
 Relational Databases
 MySQL
 Postgresql
 MS SQL
 Oracle
 Many more
 NoSQL/Columnar/OLAP/
Other
 Amazon RedShift
 Greenplum
 Hive
 OLAP cubes
 LDAP
 VectorWise
 Teradata
 More in Big Data ed.

7. How do we transport data?
 File system
 FTP
 SFTP/SCP
 Web service (SOAP,
REST)
 HTTP
 Mail, POP
 XMLRPC, Sockets, JMS, RSS...

8. Other Components
 Process data: join, filter, aggregate
 Flow control: loops, job invocation
 Logs, statistics
 Code: Java, Groovy
 On row data or standalone
 Can load libraries

9. Demo

10. Nifty Components
 FuzzyMatch - calculate Levenshtein distance or
phonetic similarity
 IntervalMatch – perform lookup/join based on
values falling within an interval
 Replace, ReplaceList - search and
replace, substitution
 UniqRow - output distinct rows based on defined
key columns

11. More Nifty Components
 XMLMap - Allows joins, column or row
filtering, transformations, and multiple outputs
 Normalize/Denormalize - split delimited strings
into columns or join columns into a string
 AggregateRow – GROUP BY;
min, max, sum, other functions used to aggregate
rows on a column

12. Tips and Tricks
 CamelCase job names for embedded jobs.
 Or prefix with ETL phase and order of execution
 Whenever appropriate (esp. for inserting
data), use the schema from the repository.
 When connecting, propagating changes to a DB
component will change it to a built-in
schema, which won't get updated.

13. Tips and Tricks
 Propagating changes to a DB component will
change it to a built-in schema, which won't get
updated after repo changes.
 On the other hand, remember that for
lookup/join (i.e., SELECT) queries you can
modify the query to only select the fields you
need. Propagating the schema is useful then.

14. Tips and Tricks
 Failure handling subjob:
 It’s an unconnected job (no triggers point to it)
 Use LogCatcher to catch, record component failures.
 Record failure in DB, file, email, etc.
 Add rollback component to undo DB changes if
necessary. May need to do this in the job if strategic
placement is needed.

15. Tips and Tricks
 In Java expressions, use methods, not
operators. E.g., concat(String) instead of the dot
operator, equals(Object) instead of ==.
 Technical components (like hash maps) are
hidden by default. See:
http://www.talendforge.org/forum/viewtopic.p
hp?pid=110860

16. Tips and Tricks
 When connecting, propagating changes to a DB
component will change it to a built-in
schema, which won't get updated after repo
changes.
 On the other hand, remember that for
lookup/join (i.e., SELECT) queries you can
modify the query to only select the fields you
need. Propagating the schema is useful then.

17. Tips and Tricks
 Use a context for job variables.
 Note you can specify type for variables.
 You can read from a file or database, or
pass in a context if an embedded Java
job.

18. Tips and Tricks
 For multi-host deployment:
 Export the job with a “bootstrap” context that has all
variables, but populates only a context config location that is
the same for all machines.
 The context config file has all values required for that host, e.g.
test DB connection for test machine.
 You can rely on the fact that Windows will interpret root as the
main system drive, so “/Data/” will translate to C:Data
 Be mindful of file permissions for sensitive context data
(e.g., DB password)

19. Tips and Tricks
 Use “Bulk” output components when possible.
 For transactional behavior:
 Start the job with DB connection
 Check “use existing connection” in all relevant
components
 Check "Die on error" in all relevant components
 End job with commit component

20. Room for Improvement
 UI stability
 Documentation

21. Books
 Getting Started with Talend Open Studio
for Data Integration by Bowen Jonathan
 Talend Open Studio Cookbook by Rick
Daniel Barton
 Big Data book coming…

22. Talend Forge
 http://www.talendforge.org/
 Forum – super helpful
 Exchange – free community components!
 Tutorials
 Bug tracker
 Source code

23. Talend Resources
 http://www.talend.com/resources
 Help Center
 Knowledge Base
 Webinars, screencasts
 Tutorials
 Docs are on download page
 And by pressing F1 on a component

24. Questions?
Compliments?
Consulting gigs?
 Contact me:
 philip@yurchuk.com
 http://philip.yurchuk.com
 http://www.linkedin.com/in/philipyurchuk/

25. Thank You!