Hello Cronies, Here are the slides of our recent meetup. . Title: It's about Time: Deep dive into event store using Apache Cassandra Big data At-A-Glance · What is Big data? · What we have seen so far in AJM Bigdata series? · Refresher/Overview of basic terminology · Where it is? Am I using it? Introduction to Apache Cassandra · What, When and Why of Apache Cassandra · Protocol, Queries, Architecture and everything else · Who is using Apache Cassandra · Interesting use cases of Apache Cassandra ( Twitter/ Disqus/ etc.) · Demo application walk-through

1. It's about time :
Deep dive into event store using
Apache Cassandra
by Nikunj Thakkar

2. Agenda
●
What is Big Data?
●
So far in AJM Bigdata
Series
●
Where it is? Am I using
it?
Big Data at-a-glance
Introduction to
Apache Cassandra
●
What, When and Why of
Cassandra
●
Protocol, Architecture,
Queries and Evrything
else
●
Interesting Use-cases
●
Demo

3. Big Data at-a-glance

4. What is BigData?

6. What is Big Data?
Large amount of data
that can only be
processed during
night hours

7. क्यया कममी रह गयमीथमी ममेरमे
जजॉब डडिडसकस रप्शन मम?
What is Big Data?

8. So far in AJM
Big Data
Series

9. 4 V's Of
Big Data

10. 4 V's Of
Big Data
Volume
Variety
Velocity
Veracity

11. CAP
Theoram

12. CAP
Theoram
Consistency
Availability
Partition tolerance

13. Family
of
NOSQL
DATABASES

14. Family
of
NOSQL
DATABASES
Wide Column Store / Column Families
Document Store
Wide Column Store / Column FamiliesWide Column Store / Column Families
Key Value / Tuple Store
Graph Databases
Multimodel Databases
Object Databases
Grid & Cloud Database Solutions
Object Databases
XML Databases
Multidimensional Databases
Multivalue Databases

15. Big Data:
Where it is?

16. Big Data:
Am I using it?

17. Targeted marketing
Public sector
Big Data:
Am I using it?
Health care
Social media and web
data
Global personal location tracking
Social media and web
data
Social media and web
data
Automated device generated data

18. Introduction to
Apache Cassandra

19. Hey wait,
First tell me about
events and event
stores.

20. What is
Apache Cassandra?

21. Top level Apache Project

22. Born at Facebook

23. Google's Big Table + Amazone's Dynamo =
Cassandra

24. Demo Time

26. Network Topology – Multiple DC

27. Why
Apache Cassandra?

28. Elastic scalability

29. Always on architecture -
No single point of failure

30. Fast linear-scale performance

31. Flexible data storage

32. Easy data distribution

33. Operational simplicity

34. Transaction support

35. Apache Cassandra: When to use?

37. Just kidding.... We will cover this part in use cases. :) :)

38. Apache Cassandra: Interesting Facts

39. Apache
Cassandra:
Interesting
Facts
Protocol

40. Apache
Cassandra:
Interesting
Facts
Protocol
Thrift
vs
CQL Binary Protocol

41. Apache
Cassandra:
Interesting
Facts
Architecture

42. Apache
Cassandra:
Interesting
Facts
Architecture
Key structures
➔
Node
➔
Data Center
➔
Cluster
➔
Commit Log
➔
Table
➔
SSTable

43. Apache
Cassandra:
Interesting
Facts
Architecture
Key components

44. Apache
Cassandra:
Interesting
Facts
Architecture
Key components
➔
Gossip
➔
Partitioner
➔
Replication factor
➔
Replica placement
strategy
➔
Snitch

45. Apache
Cassandra:
Interesting
Facts
Cassandra Query
Language

46. Apache
Cassandra:
Interesting
Facts
Cassandra Query Language
➔
CRUD
➔
Data Modeling
➔
Indexing

47. Apache Cassandra@
Disqus

48. Apache Cassandra@
Disqus
➔
Disqus - Disqus is a discussion platform for the
web. It connects publishers with users and
allow them to have a public discourse in a
medium that allows communication across the
web.

49. Apache Cassandra@
Disqus
➔
Disqus uses Cassandra in a number of different places. Mainly
in the product; it’s used for content recommendation and also
a little bit of advertising. Let’s say you’re on that article
reading about the war in Syria and you notice that there’s
another interesting article relating to what the British PMs
have released as a public statement relating to whether or
not it’s legal to go to war, and maybe you’re interested in
reading that response. What Cassandra does is it powers the
analytics and content engine behind how disqus recommends
content.

50. Apache Cassandra@
Disqus
➔
Main cluster - 24 nodes
➔
CPU - 6-core Xeons 3Ghz – Biggest – Because
turning out to be a small bottleneck at times
➔
24GB RAM – Per node – 8 GB Heap Size
➔
32 or 48GBs RAM wasn't helping much
➔
it’s handling our load of about 30,000 reads a second

51. Apache Cassandra@
Many other companies

53. Thank you :)

54. Resources for Material
● http://smartdatacollective.com/bernardmarr/277731/big-data-25-facts-everyone-need
s-know
● http://blog.gramener.com/1984/indian-elections-2014-big-data-for-billion-people
● http://indiaspora.org/blog/indian-elections-2014-big-data-for-billion-people/
● http://www.slideshare.net/BernardMarr/140228-big-data-volume-velocity-variety-varac
ity-value
● http://www.datastax.com/documentation/cassandra/2.1/cassandra/gettingStartedCass
andraIntro.html
● http://planetcassandra.org/
● http://planetcassandra.org/blog/disqus-discusses-migration-from-redis-to-cassandra-for
-horizontal-scalability/
● http://wiki.apache.org/cassandra/

55. Resources for Graphics
● http://newstonight.net/content/obesity-pushing-diabetes-cases
● http://lordapes.blogspot.in/
● http://blog.marketo.com/2013/07/big-data-it-doesnt-mean-what-you-think-it-means.html
● http://www.portaloko.hr/clanak/20-stvari-koje-muskarci-nikada-nece-shvatiti-kod-zena/0/59710/
● http://www.blankchapters.com/wp-content/uploads/2012/12/meme-data-data-everywhere.png
● https://medium.com/media-changes/don-draper-applies-for-a-job-in-2013-59aec7398582
● http://techblog.netflix.com/2011/11/benchmarking-cassandra-scalability-on.html
● http://www.slideshare.net/planetcassandra/apache-cassandra-and-datastax-enterprise-explained-
with-peter-halliday-at-wildhacks-nu
● http://qph.is.quoracdn.net/main-qimg-dce3b73956c5313650022a5b22068982?convert_to_webp
=true
● http://treasure.diylol.com/uploads/post/image/553987/resized_kevin-hart-meme-generator-i-woul
d-take-questions-but-the-way-my-presentation-is-set-up-f1cfd6.jpg