![“
”
After two years of working
with Cassandra’s CQL driver,
[JDBC] feels like a step
backwards.
Java Python C# C++
Ruby Go PHP node.js
Jonah Grimes](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Cassandra Summit 2015
- 1. CTO, DataStax Jonathan Ellis Project Chair, Apache Cassandra™
- 2. “ ” After two years of working with Cassandra’s CQL driver, [JDBC] feels like a step backwards. Java Python C# C++ Ruby Go PHP node.js Jonah Grimes
- 4. Operational Database Magic Quadrant
- 10. client server
- 13. X
- 16. Armin Ronacher
- 18. client p1 p1 p1
- 20. Apr 2011 Oct 2012 Dec 2012 Sep 2013 Sep 2014 Sep 2015 outages
- 21. AWS RE:Boot 2014. 218 Cassandra nodes rebooted. 22 nodes didn’t come back and got replaced. Zero Netflix downtime. Christos Kalantzis Director of Engineering “ ”
- 24. 2013: 3 nodes 2015: 300 nodes
- 26. Geolocated Active-Active — Stable State Geolocated Regional Load Balancers Regional Load Balancers
- 27. 100% Active-Active — Failover Geolocated Regional Load Balancers Regional Load Balancers
- 29. HDFS 64MB Blocks
- 31. [I]t seems like HBase is very buggy where 50% of sampled failures are catastrophic, and Cassandra is well engineered. “ ”Murat Demirbas SUNY Buffalo
- 32. mmap, fsync, fadvise commitlog, sstables compaction, streaming
- 35. Cassandra 2.2 and 3.0
- 36. Windows Support JSON UDF Role-based authz Commitlog Compression New Storage Engine New Hints Architecture Materialized Views DTCS Message Coalescing 3.0
- 37. Windows Support DTCS UDF Role-based authz Commitlog Compression New Storage Engine New Hints Architecture Materialized Views JSON Message Coalescing 2.2 3.0(July) (Expected in October)
- 38. JSON CREATE TABLE users ( id uuid PRIMARY KEY, name text, state text, birth_date int ); INSERT INTO users (id, name, state, birth_date) VALUES(now(), 'Joe User', 'TX', 1982); INSERT INTO users JSON '{"id": "1a4f88e2-6dc8-4edd-9e16-a7ba9c941f8d", "name": "Joe User", "state": "TX", "birth_date": 1982}';
- 39. Collections CREATE TABLE example ( id int PRIMARY KEY, tupleval tuple<int, text>, numbers set<int>, words list<text> ); INSERT INTO example (id, tupleval, numbers, words) VALUES (0, (1, 'foo'), {1, 2, 3, 6}, ['the', 'quick', 'brown', 'fox']); INSERT INTO example JSON '{"id": 0, "tupleval": [1, "foo"], "numbers": [1, 2, 3, 6], "words": ["the", "quick", "brown", "fox"]}';
- 40. User-defined types CREATE TYPE address (number int, street text); CREATE TABLE users ( id int PRIMARY KEY, street_address frozen<address> ); INSERT INTO users (id, street_address) VALUES (1, {number: 123, street: 'Cassandra Ave'}); INSERT INTO users JSON '{"id": 1, "street_address": {"number": 1, "street": "Cassandra Ave"}}';
- 41. Deeper Nesting CREATE TYPE address ( street text, city text, zip_code int, phones set<text> ); CREATE TABLE users ( id uuid PRIMARY KEY, name text, addresses map<text, frozen<address>> );
- 42. Deeper Nesting INSERT INTO users JSON '{"id": "0514e410-2a9f-11e5-a2cb-0800200c9a66", "name": "jellis", "addresses": {"home": {"street": "9920 Cassandra Ave", "city": "Austin", "zip_code": 78700, "phones": ["1238614789"]}}}';
- 45. Role-based Authorization CREATE ROLE accounting; GRANT all ON invoices TO accounting; GRANT select ON expenses TO accounting; GRANT select ON payroll TO accounting; GRANT accounting TO josie; GRANT accounting TO jay;
- 46. User-defined Functions (UDF) CREATE FUNCTION my_sin (input double) RETURNS double LANGUAGE java AS ’ return input == null ? null : Double.valueOf(Math.sin(input.doubleValue())); ’; SELECT key, my_sin(value) FROM my_table WHERE key IN (1, 2, 3);
- 47. UDF Aggregation CREATE AGGREGATE avg (int) SFUNC avgState STYPE tuple<long, int> FINALFUNC avgFinal; CREATE FUNCTION avgState (state frozen<tuple<bigint, int>>, i int) RETURNS frozen<tuple<bigint, int>>, int LANGUAGE JAVA AS ’ // (state[0] + i, state[1] + 1) state.setLong(0, state.getLong(0) + i.intValue()); state.setInt(1, state.getInt(1) + 1); return state; ’; CREATE FUNCTION avgFinal (state frozen<tuple<bigint, int>>) RETURNS double LANGUAGE JAVA AS ’ double r = state.getLong(0) / state.getInt(1); return Double.valueOf(r); ’;
- 51. 3.0 Preview
- 56. SSTable-based Hints Hint Compacted Tombstone Memtable Commitlog SSTableCommitlog SSTable Memtable
- 59. 3.0 2.2 2.2 Hints vs 3.0Operations/s Time
- 60. Materialized Views CREATE TABLE songs ( id uuid PRIMARY KEY, title text, album text, artist text ); CREATE MATERIALIZED VIEW songs_by_album AS SELECT * FROM songs WHERE album IS NOT NULL PRIMARY KEY (album, id); SELECT * FROM songs_by_album WHERE album = ‘Tres Hombres’;
- 61. Indexes CREATE TABLE songs ( id uuid PRIMARY KEY, title text, album text, artist text ); CREATE INDEX songs_by_album on songs(album); SELECT * FROM songs WHERE album = ‘Tres Hombres’;
- 62. Local Indexes client title artist album La Grange ZZ Top Tres Hombre s title artist album Outside... Back Door Slam Roll Away title artist album Waitin... ZZ Top Tres Hombres
- 63. Materialized Views client album id Tres Hombres a3e64f8f Tres Hombres 8a172618 album id Roll Away 2b09185b
- 64. Stress: raw vs 1 MV vs 5 MV Operations/s Time raw 1 MV 5 MV
- 66. Beyond 3.0
- 68. 3.0 releases 3.0 rc1: Out now 3.0 GA October December 3.1 3.2 January February 3.3
- 69. 3.0 releases 3.0 rc1: Out now 3.0 GA October December 3.1 3.0.1 3.2 3.0.2 January February 3.3 3.0.3
- 71. DataStax Training for Apache Cassandra™