Apache Cassandra is a massively scalable, highly available NoSQL database that provides continuous availability without compromising performance. It handles big data workloads across multiple data centers with no single point of failure and allows for fast, linear scalability as well as elasticity. Cassandra offers tunable data consistency, location independence for reading and writing data anywhere, and a familiar SQL-like language called CQL.

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%
%