1. Modern Cassandra for Developers
Jeremy Hanna
Support Engineer
©2013 DataStax Confidential. Do not distribute without consent.

2. Solid Design
•Massive scalability
•Multi-datacenter
•High Performance
•Reliability/Availability
•no SPOF, no special roles

3. Ease of Use?

4. Approachable
•CQL3
•Cassandra native drivers
•Native paging
•Tracing
•DevCenter
•Atomic batches
•Lightweight transactions
•Triggers

5. CQL3
•Basic auth, similar to mysql
• CREATE
• GRANT
USER bombadil WITH PASSWORD 'goldberry4ever' SUPERUSER;
ALTER ON KEYSPACE shire TO gandalf;
•Native drivers
•Support for collections (list, map, set)
•Hadoop support
•Tracing
•Native paging (2.0)

6. CQL3 examples
CREATE KEYSPACE shire WITH
REPLICATION = {'class': 'NetworkTopologyStrategy', 'eu' : 3, 'us-east' : 2};
SELECT * FROM emp WHERE empID IN (130,104) ORDER BY deptID DESC;
INSERT INTO excelsior.clicks (userid, url, date, name)
VALUES (
3715e600-2eb0-11e2-81c1-0800200c9a66,
‘http://cassandra.apache.org',
‘2013-10-09',
‘Mary')
USING TTL 86400;
UPDATE users
SET email = ‘charlie@wonka.com’
WHERE login = ‘cbucket64'
IF email = ‘cbucket@wonka.com’

7. Native drivers
•Asynchronous
•allows multiple concurrent queries per connection
•Server notifications
•Made for CQL3
•Java, C#, Python, others in community

8. DevCenter

9. Request Tracing
•Interactively using cqlsh
•Programmatically using the Java driver
•Probabilistic tracing

10. Various other goodies
•Atomic batches for grouped updates
•Lightweight transactions
•Example: username creation
•Heavy operation (4 round-trips)
•Triggers (warning experimental in 2.0)
•CREATE TRIGGER <name> ON <table> USING <classname>;

11. Questions?
•Jeremy Hanna
•Support engineer at DataStax
•@jeromatron on twitter and #cassandra irc
•See also
•https://github.com/datastax/java-driver
•http://www.datastax.com/what-we-offer/products-services/devcenter
•http://www.datastax.com/docs
•http://www.datastax.com/dev/blog