ING is truly positioning themselves more and more as a technology driven company. “The ING way” is all about finding new opportunities and products to exceed customers' expectations and to make sure that we focus on how to deliver the product instead of developing different products catering to the same need. Over the past 2 years ING is adopting Cassandra fast and at the same time, ING is also focusing on the Customer Experience using a touch-point architecture based more and more on micro-services. For most API’s Cassandra is a perfect match whilst easing availability challenges by being active-active and having an always-on architecture. However, at ING we have a plenty of relatively small use cases which makes justifying dedicated clusters difficult due to avoiding SAN and hardware choices already made. Therefore a shared cluster is inevitable. We call this KaaS – Keyspace as a Service and can be compared to a hotel with tenants. One crucial aspect is that we need to create a sandbox environment for the entire organization as implementing Cassandra is hard and requires experience and un-learning. Gary Stewart and Christopher Reedijk share our experiences on how we are making the switch to NoSQL accessible for the whole organization. It is far from easy and we will also talk about how we are addressing containment and a cost model for the hotel rooms.

1. Exploiting Hotel Cassandra
cqlsh> SELECT * FROM presentations WHERE eventname='CassandraSummit' AND company='ING' AND year=2015;
eventname | company | year | area | name | presentation | title | twitter
-----------------+---------+------+------+---------------------+-----------------------------+-----------------------+-----------
CassandraSummit | ING | 2015 | NL | Christopher Reedijk | ExploitING Hotel Cassandra | Engineer/Chapter Lead | @creedijk
CassandraSummit | ING | 2015 | NL | Gary Stewart | ExploitING Hotel Cassandra | Engineer/Architect | @Gaz_GandA
(2 rows)

2. cqlsh> SELECT * FROM presentations WHERE eventname='CassandraSummit' AND company='ING';
eventname | company | year | area | name | presentation | title | twitter
-----------------+---------+------+------+---------------------+-----------------------------+-----------------------+-----------
CassandraSummit | ING | 2015 | NL | Christopher Reedijk | ExploitING Hotel Cassandra | Engineer/Chapter Lead | @creedijk
CassandraSummit | ING | 2015 | NL | Gary Stewart | ExploitING Hotel Cassandra | Engineer/Architect | @Gaz_GandA
CassandraSummit | ING | 2014 | NL | Christopher Reedijk | C*@ING: Testing the waters | Dev Engineer | @creedijk
CassandraSummit | ING | 2014 | NL | Gary Stewart | C*@ING: Testing the waters | Dev Engineer | @Gaz_GandA
(4 rows)
Exploiting Hotel Cassandra

3. Market leaders Benelux
Growth markets
Commercial Banking
Challengers
3
World map
Over 40 countries
52,000+ employees

4. Market leaders Benelux
Growth markets
Commercial Banking
Challengers
4
European map
Full-service bank
Very strong European base
Ranked 7th
Largest bank of NL
150+ DevOps teams

5. • Engineer / Architect
• Love/hate relationship with C*
• 15 years of experience in IT
• @ING since: 01-01-2012
• Engineer / Chapter Lead
• Back-end guy
• 11 years of experience in IT
• @ING since: 01-01-2011
5
a little bit about us
Gary Stewart Christopher Reedijk
#CassandraSummit

6. 6
on a dark desert highway #CassandraSummit

7. There was a need for
availability
There was a need for
consistency
There was a need for
scalability
7
on a dark desert highway #CassandraSummit

8. • Lots of small use cases
• Lots of DevOps teams
• No ephemeral (dedicated) storage
• Zero to none NoSQL experience
my head grew heavy and my sight grew dim
8
#CassandraSummit

9. this could be Heaven or this could be Hell
9
#CassandraSummit

10. • Cassandra seemed to be the solution
• How to work with this paradigm shift
• Are we ready for it?
this could be Heaven or this could be Hell
10
#CassandraSummit

11. then she lit up a candle and she showed me the way
11
#CassandraSummit

12. APIs and Cassandra are a great fit
e.g. http://host/customer/{id}
then she lit up a candle and she showed me the way
12
#CassandraSummit

13. welcome to the Hotel Cassandra
13
#CassandraSummit

14. • Combine the small use cases
• Keeping costs in mind
• Do we dare to share?
welcome to the Hotel Cassandra
14
#CassandraSummit

15. such a lovely place..., such a lovely face
15
#CassandraSummit
Luxury
Hotel
1100+ colleagues trained
4 certified trainers
35+ DevOps teams
12 clusters (4/5 environments)
Containment
Reduce paperwork
Unexpected load
Infrastructure
Functionality
MonitoringAdvice
Life cycle
management
Security
Velocity
Training

16. 16
plenty of room at the hotel cassandra #CassandraSummit

17. 17
sandbox feedback containment
plenty of room at the hotel cassandra #CassandraSummit

18. some dance to remember, some dance to forget
18
#CassandraSummit

19. • Can our hardware give us containment?
YES, but very expensive
• Can Cassandra offer containment?
NO, not on keyspace level
• Can other technologies give us containment?
PARTIALLY, but involves new technologies
• Can our software give us containment?
YES, but needs ownership
some dance to remember, some dance to forget
19
#CassandraSummit

20. so I called up the Captain
20
#CassandraSummit

21. so I called up the Captain
21
#CassandraSummit

22. so I called up the Captain
22
#CassandraSummit

23. please bring me my wine
23
#CassandraSummit

24. please bring me my wine
24
#CassandraSummit

25. please bring me my wine
25
#CassandraSummit

26. please bring me my wine
26
#CassandraSummit

27. please bring me my wine
27
#CassandraSummit

28. they livin' it up at the hotel cassandra
28
#CassandraSummit

29. they livin' it up at the hotel cassandra
29
#CassandraSummit

30. what a nice surprise..., bring your alibis
30
#CassandraSummit

31. what a nice surprise..., bring your alibis
31
#CassandraSummit

32. • SSD's for SOLR/Spark
• 3.6TB Nodes
• 3 Data Centers
• Spinning disks
• 3.6TB Nodes
• Spinning disks
• 10-15TB per node
• Date Tiered Compaction
32
mirrors on the ceiling..., the pink champagne on ice #CassandraSummit

33. we are all just prisoners here, of our own device
33
#CassandraSummit

34. we are all just prisoners here, of our own device
34
#CassandraSummit

35. they stab it with their steely knives
35
#CassandraSummit

36. they stab it with their steely knives
36
#CassandraSummit

37. they stab it with their steely knives
37
#CassandraSummit

38. but they just can't kill the beast
38
#CassandraSummit

39. • Tracking of queries in order to give more insight in
common best practices and actual use case pattern
• Cross-environment datamodel check
• Capacity management with prediction
• ...
but they just can't kill the beast
39
#CassandraSummit

40. 40
you can check-out any time you like..., but you can never leave! #CassandraSummit

41. There is the need for
availability
There is the need for
consistency
There is the need for
scalability
41
you can check-out any time you like..., but you can never leave! #CassandraSummit

42. Thank you
christopher.reedijk@ing.nl
@creedijk
gary.stewart@ing.nl
@Gaz_GandA
visuals by Isabelle Hörl:
www.isabellehorl.com | @IsabelleHorl
we are hiring!

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