5. What%is%Cassandra?%
• Apache Cassandra™ is a massively
scalable NoSQL database.
• Cassandra is designed to handle big data
workloads across multiple data centers
with no single point of failure, providing
enterprises with continuous availability
without compromising performance.

6. Why%Cassandra%
• Fast / Linear scalability
• Elastic
• No single point of failure
• Very little moving parts
• Enterprise / multi-data center / cloud data distribution
• Location independence – read and write anywhere
• Dynamic / Flexible data structure
• Tunable data consistency (per operation)
• Data compression
• Cloud ready
• Familiar SQL-Like language – CQL
• Easy setup
• No special hardware needed
• No special caching layer needed

8. 4% 2%
3%
1%
data1%
data1%
data2%
data2%

9. Network%Topology%

10. Data%Consistency%
• Any%
• One%
• Quorum%
• Local_Quorum%
• Each_Quorum%
• All%
Writes%
• One%
• Quorum%
• Local_Quorum%
• Each_Quorum%
• All%
Reads%

11. Durable%Writes%
INSERT%INTO…%
Commit&log& memtable&
SSTable&

12. Data%Structure%
Keyspace:&Matrix&&&&&&replica7on_factor:&3&
Column%Family:%character_locaLons%
day1% morphius:<7meuuid>:&coordinates%neo:<7meuuid>:&coordinates%
day1:neo% <7meuuid>:&coordinates%
day1:morph% <7meuuid>:&coordinates% <7meuuid>:&coordinates%
<7meuuid>:&coordinates%
Column%Family:%character_informaLon%
neo% DOB:&2600H06H27%Actor:&Keanu&Reeves% email1:&Neo@matrix%
email2:&mr.anderson@vr.net%

13. Overview%of%DataStax%
• Founded in April 2010
• Commercial leader in Apache Cassandra™
• 300+ customers (including 20 of the Fortune 100)
• 100+ employees
• Home to Apache Cassandra Chair & most
committers
• Headquartered in San Mateo
• Funded by prominent venture firms

14. DataStax%Enterprise%Architecture%

16. DataStax%Cassandra%
• Kerberos%authenLcaLon%
• Encrypted%data%at%rest%
• AudiLng%
• iSECpartners%validated%

18. <schema%name="wikipedia"%version="1.1">%
%<types>%
%%<fieldType%name="string"%class="solr.StrField"/>%
%%<fieldType%name="text"%class="solr.TextField">%
%%%%<analyzer><tokenizer%class="solr.WikipediaTokenizerFactory"/></analyzer>%
%%</fieldType>%
%</types>%
%<fields>%
%%%%<field%name="id"%%type="string"%indexed="true"%%stored="true"/>%
%%%%<field%name="name"%%type="text"%indexed="true"%%stored="true"/>%
%%%%<field%name="body"%%type="text"%indexed="true"%%stored="true"/>%
%%%%<field%name="Ltle"%%type="text"%indexed="true"%%stored="true"/>%
%%%%<field%name="date"%%type="string"%indexed="true"%%stored="true"/>%
%</fields>%
%<defaultSearchField>body</defaultSearchField>%
%<uniqueKey>id</uniqueKey>%

19. Searching%Data%
HTTP&
curl%"hZp://localhost:8983/solr/wiki.solr/select?%q=Ltle%3AnaLo%2A%20AND
%20Ltle%3A%5B2000%20TO%202010%5D"%%
&
&
CQL3&
use%wiki;%
select%Ltle%from%solr%where%solr_query='Ltle:naLo*%AND%Ltle:[2000%TO%2010]';%%
%

20. Workload%IsolaLon%
Solr%
C*%
C*%
C*%
C*%
Solr%
Solr%
Solr%
Solr%Queries%
Cassandra%Queries%

22. Hive%
• {LEFT|RIGHT|FULL}%[OUTER]%JOIN%
• GROUP%BY%
• {SORT|DISTRIBUTE|CLUSTER|ORDER}%BY%
• UNION%
• Sub%Queries%
%

23. Hive%p>%Cassandra%Example%
DROP%TABLE%IF%EXISTS%StockHist;%
CREATE%EXTERNAL%TABLE%
StockHist(row_key%string,%column_name%string,%value%double)%
STORED%BY%'org.apache.hadoop.hive.cassandra.Cassand%raStorageHandler’%
WITH%SERDEPROPERTIES%("cassandra.ks.name"%=%"PorvolioDemo",%%
"cassandra.cf.validatorType"%=%"UTF8Type,UTF8Type,DoubleType"%);%%
%

24. Pig%
cassandra_data%=%LOAD%'cassandra://<keyspace>/<CF>'%%
USING%CassandraStorage()%AS%(name,%columns:%bag%{T:%tuple(score,%value)});%
%
total_scores%=%FOREACH%cassandra_data%GENERATE%name,%
COUNT(columns.score),%LongSum(columns.score)%as%total%PARALLEL%3;%
%
ordered_scores%=%ORDER%total_scores%BY%total%DESC%PARALLEL%3;%
%
STORE%ordered_scores%INTO%'cfs:///final_scores.txt'%USING%PigStorage();%

25. Workload%IsolaLon%
H*%
C*%
C*%
C*%
C*%
H*%
Solr%
Solr%
Solr%Queries%
Cassandra%Queries%
Hadoop%AnalyLcs%

29. Cassandra%Roadmap%
%