What's new for Java in the clouds?

Transcript

1. What’s new for Java in the clouds? Sebastian Daschner Lead Developer Advocate
2. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS About me Sebastian Daschner Lead Java Developer Advocate @ IBM Java Champion Consultant, trainer, book author JCP Expert Group member & Jakarta EE Committer Oracle Developer Champion (Alumni) JavaOne Rockstar speaker
3. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Let’s talk about Java
4. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Java: Where are we? • #1 Tiobe Index • Widely used in enterprise software • 20+ years of experience • Often first choice in universities • Powers the smallest to largest runtimes
5. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS And the future?
6. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Thinking positively about Java? Still learning about features in Java 8? Looking at Java 10 or going to Java 11? Trying to understand the new feature release process? Worried about being able to use Java for free? Exploring “Java Platform Module System”? Trying out Jshell? Figuring out jlink?
7. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS It’s easy to focus on now – it’s real and concrete
8. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Updated Java release process 6 ... 7 ... 8 … <fast forward> 9,10,11,…17958?
9. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Our ecosystem is repositioning for a faster pace • Predictable • Consistent cadence • Easier migration • Increased innovation
10. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS More like… Continuous Delivery?
11. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Our ecosystem is repositioning for a faster pace Are you too?
12. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Updated Oracle JDK support Is Java still free?
13. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS “free as in beer” && ”free as in speech”
14. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Java distribution & support • Oracle JDK • Oracle OpenJDK • AdoptOpenJDK • Eclipse OpenJ9 • Azul Zulu • SapMachine • ...
15. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Is Java still free? Short answer: Yes!
16. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Free updates? Short answer: It depends
17. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Free & $free Java • Oracle OpenJDK builds (GPLv2+CE) (six-month cadence) • Eclipse OpenJ9 • OpenJDK builds by AdoptOpenJDK, Azul, IBM, Red Hat, ...
18. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Hardware & Scale
19. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS More, and more, and Moore... https://commons.wikimedia.org/wiki/File:Moores_law_(1970-2011).PNG
20. JVMs can now scale from the very smallest to the very largest devices tiny humongous
21. From the smallest... On the smart card Next to the processor (separate IC) In the processor
22. ...to the very biggest...
23. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS ...to the Clouds The sky is the limit
24. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS And then we finally achieved Compute on Tap, Everything-as-a-Service
25. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS New economics compute == $ memory == $ -Xmx: $100
26. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Very long running, efficient, monolithic applications Willing to trade startup time for throughput
27. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Short lived, container based, micro service oriented, instant-on, always available, cross server, polyglot services Now we also need
28. Demand time
29. Demand time How does your application respond to demand?
30. Demand time One big server running all the time?
31. Demand time One big server running all the time? Look at all that wasted money!
32. Demand Smaller compute units are better
33. Demand time Smaller compute units are better
34. Time Ideal profile Memory Throughput
35. Time Real data OpenJDK 9 with Hotspot
36. Time Real data OpenJDK 9 with Hotspot OpenJDK 9 with OpenJ9
37. Time Real data OpenJDK 9 with Hotspot OpenJDK 9 with OpenJ9 OpenJDK 9 with OpenJ9 + AOT
38. IBM donated J9 to Eclipse because we believe it’s the best way to move Java forward • It offers a new place to start • As the future emerges we can see that Java needs to handle new technologies, new hardware • We can’t do it on our own. We have to do it together
39. https://adoptopenjdk.net/?variant=openjdk8-openj9
40. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS The future starts here… ? Data Analytics Machine Learning
41. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS JVMs will need to offer good machine learning & data analysis capabilities
42. GPU’s Parallel computation at high scale
43. “Using a GPU without understanding how they work is like driving your car in reverse all the time”
44. IBM + NVIDIA Improving Java application performance with GPU exploitation is available in IBM SDK for Java 8 and OpenJDK 9 with Eclipse Open9 Standard SE API optimisation as well as CUDA4J API for explicit low level control +
45. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS From now on – you and your application will have to change as well GPUs require you to think differently So will AI and Machine Learning.
46. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS BTW – what does a server GPU look like? NVIDIA’s largest graphics card is the DGX-2 It’s 2 petaflops, 512 gigabyte, 10 kilowatts It weighs 160 kg That’s as much as a fully grown panda.
47. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Numbers of GPU’s in data centers are growing Java team is working on improved native code interop http://openjdk.java.net/projects/panama/ Making Java more attractive for new workloads
48. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION And beyond?
49. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS
50. Runtime Language Type Safe Bytecode: JIT Compiled Garbage Collected Concurrent Threaded All Platforms The JVM’s design characteristics allow us to imagine taking it to new places No other runtime environment comes close
51. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS The JVM design means that we can easily imagine running JVM languages on new forms of processors. The JVM can take the application model and transform it to the something suitable for the hardware
52. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Java Vendor competition and collaboration delivered • The fastest runtime environments • The most scalable runtime environments • The best garbage collectors • The greatest dynamically re-optimizing compilers • And we’re still doing it.
53. © 2015 INTERNATIONAL BUSINESS MACHINES CORPORATION @DaschnerS Generating new JVM technologies • Container awareness • Fast native code interop • Re-optimised JITs • Re-tuned GC’s • AOT • Value Objects • Jit As A Service • <your idea here>
54. Thank you! sebastian-daschner.com @DaschnerS https://www.eclipse.org/openj9/ https://medium.com/@javachampions/java-is-still-free-c02aef8c9e04 https://developer.ibm.com/blogs/2018/11/28/java-licensing-is- changing-and-you-could-be-affected/