Astyanax: A Highly Configurable Cassandra Client for Java
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Astyanax is the thrift protocol based C* driver widely used and open sourced by Netflix. It was recently integrated with the Java Driver released by DataStax. This talk focusses on the different options available with Astyanax and how it complements the Java Driver. About Puneet Oberai, Senior Software Engineer at Netflix Senior Software Engineer at Netflix and proud team member of Netflix CDE (Cloud Data Engineering).
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Astyanax: A Highly Configurable Cassandra Client for Java
- 1. Astyanax Puneet Oberai Ne1lix, Inc.
- 3. Useful features – Load balancing – ConnecDon pooling -‐ resilient with failover and retries – Integrates with external host discovery – Metrics (there are a lot!) – Highly configurable and pluggable
- 4. Fluent query syntax ColumnList<Integer> = keyspace .readQuery( “myCF” ) .getRow( “A” ) .withColumnSlice( new RangeBuilder() .greaterThan(11) .lessThanEquals(18) .build()) .execute() .getResult();
- 5. Recipes • All Rows Reader • Distributed Row Lock • Queue • Chunked Object Store
- 6. How does Ne1lix use it
- 7. Java Driver release in 2013 • Async interface! • Cursor support • Batching for mutaDons • Prepared statements • Flexible retry policies • And everything else in CQL ..
- 8. But what about thrie !!?? I’m sDll using it. Calm down, thrie is sDll supported J
- 9. Astyanax can use both drivers
- 10. Now the good stuff! What about performance? If you use prepared statements, you’re good!
- 11. Reads (about 2%)
- 12. Writes (a bit more 5%-‐10%)
- 13. Prepared Statements are a must
- 14. Prepared Statements • There is no magic here – You “prepare” – Then you re-‐use
- 15. Astyanax value add Structured queries naturally have some query signature keyspace.prepareQuery( myCF ) .withRow( myRowKey ) .withColumnSlice( start, end) .execute(); Translates to select * from ks.myCF where key=? and column1 >=? and column1 <=?;
- 16. Columns v/s Rows • Are columns really columns? • Are rows sDll rows? • Are columns really rows?
- 17. Simple schema Key validator – int Col comparator – int Default validator – u18
- 18. Rows are now transposed
- 19. Astyanax value add • Astyanax maintains backwards compaDbility with the api • Hence rows are sDll rows and columns are sDll columns
- 20. So what should I use? • Astyanax has recipes • Astyanax is good for structured queries • If all you want is CQL3, then use Java Driver
- 21. QuesDons?