Introduction to Apache Cassandra

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Aran Deltac

Tecnología

Cassandra A highly scalable, eventually consistent, distributed, structured key-value store.

Cassandra Super Column Super Column Name Column Name Value

// Column: { emailAddress: ‘jill@example.com’ }

// Super Column: homeAddress: { // Columns: street: ‘1234 Example St.’, city: ‘Santa Cruz’, state: ‘CA’, zip: ‘91210’ }

// Column Family: userProfiles: { // Rows: bob2007: { // Columns: username: ‘bob2007’, age: 32, phone: ‘(818) 555-2345’ }, birdHOUSE: { username: ‘birdHOUSE’, name: ‘George’, age: 19 } }

// Super Column Family: addressBook: { // Rows: bob2007: { // Super Columns: Joe: { email:’joe@example.com’ }, Ted: { street:’123 Jump St.’, phone:’555-1234’ } } birdHOUSE: { mom: { birthday:’1953-03-07’, phone:’555-7894’ } } }

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Introduction to Apache Cassandra

1. Cassandra A highly scalable, eventually consistent, distributed, structured key-value store.

2. The cursed oracle of Troy.

3. Structured Key-Value Store

4. Berkely DB, Memcached, etc Name Value

5. Cassandra Super Column Super Column Name Column Name Value

6. Distributed

8. Eventually Consistent

9. Node 1 Node 2 Node 3 Node 4 Write

10. Node 1 Node 2 Node 3 Node 4 Read

11. Node 1 Node 2 Node 3 Node 4 Write

12. Highly Scalable

13.

14.

15. Fault Tolerant

16.

17.

18. Rich Data Model

19. // Column: { emailAddress: ‘jill@example.com’ }

20. // Super Column: homeAddress: { // Columns: street: ‘1234 Example St.’, city: ‘Santa Cruz’, state: ‘CA’, zip: ‘91210’ }

21. // Column Family: userProfiles: { // Rows: bob2007: { // Columns: username: ‘bob2007’, age: 32, phone: ‘(818) 555-2345’ }, birdHOUSE: { username: ‘birdHOUSE’, name: ‘George’, age: 19 } }

22. // Super Column Family: addressBook: { // Rows: bob2007: { // Super Columns: Joe: { email:’joe@example.com’ }, Ted: { street:’123 Jump St.’, phone:’555-1234’ } } birdHOUSE: { mom: { birthday:’1953-03-07’, phone:’555-7894’ } } }

23. Time for an example. Any questions?

Introduction to Apache Cassandra

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Introduction to Apache Cassandra