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A comment on Apache Helix – Near-Realtime Rsync Replicated File System. Parent comment

Re:Apache Helix – Near-Realtime Rsync Replicated File System by pron on Monday October 26, 2020 @04:49PM (#24901218)
That was true for Java 8; we're at Java 15 now. No need to tune anymore (except in extraordinary circumstances).
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by klodolph on Monday October 26, 2020 @05:43PM (#24901829)
It’s still true for Java 8, because a lot of people still use Java 8, because Oracle changed the licensing model.
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by pron on Monday October 26, 2020 @05:59PM (#24902000)
Yes, Oracle changed the JDK's licensing model from part-proprietary/part-open, part-free/part-paid to 100% open and free (as of JDK 11). What confused some people is that the old website for the semi-free JDK is now for Oracle support customers who pay for support (even though that page directs non-customers to the free version) and Oracle provides the free JDK over at http://jdk.java.net/
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by nixgeek on Monday October 26, 2020 @07:53PM (#24902973)
Hi Ron. If you're still employed by Oracle, it might not be a bad idea to disclose that, either in the specific comments where you may be talking (semi-)authoritatively about Java and its licensing / commercial model, or within your HN profile. I recall the last talk I saw from you was an AMA at QCon London in 2019 about Java, where you were with Oracle.

I found the comments really clueful but also appreciate when others like e.g. @_msw_ are very overt with disclosure of their employment and interests whilst talking about $employer's stuff on HN (and in his case that'd be AWS and EC2).

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Re:Apache Helix – Near-Realtime Rsync Replicated File System by pron on Tuesday October 27, 2020 @05:40AM (#24905777)
Hey Alex! Yes I am with Oracle, and indeed I always make sure to disclose my affiliation: I do so on HN every couple of months or whenever it's relevant (when saying something that could be biased/controversial). It's not just a nice thing to do, but it's also company policy.
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by klodolph on Monday October 26, 2020 @06:21PM (#24902208)
It is… definitely not that simple. Not for everyone, at least.
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by shock on Monday October 26, 2020 @06:42PM (#24902370)
What is the less simple part?
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by wbl on Monday October 26, 2020 @06:48PM (#24902414)
OpenJDK is still available under the GPL.
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by mehrdadn on Monday October 26, 2020 @04:57PM (#24901288)
We have Java 15 now?? Java 9 came out literally 3 years ago...
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by dfinninger on Monday October 26, 2020 @05:04PM (#24901374)
Biannual release cadence now. 8, 11, and 17 (eventually) are LTS releases. Every 3 years.

https://wikipedia.org/wiki/Java_version_history

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Re:Apache Helix – Near-Realtime Rsync Replicated File System by dtech on Monday October 26, 2020 @05:08PM (#24901432)
They switched to 2 releases per year
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Re:Apache Helix – Near-Realtime Rsync Replicated File System by hedora on Monday October 26, 2020 @09:32PM (#24903651)
Java 15 defaults to a pause free garbage collector with bounded space overhead? Citation needed.

Edit: also, did they replace the JIT with AOT?

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Re:Apache Helix – Near-Realtime Rsync Replicated File System by pron on Tuesday October 27, 2020 @05:36AM (#24905751)
> Java 15 defaults to a pause free garbage collector with bounded space overhead? Citation needed.

No, OpenJDK 15 defaults to G1 (since JDK 9), but it is very different from G1 in JDK 8 and rarely requires tuning: https://archive.fosdem.org/2020/schedule/event/g1/

Plus, ZGC, the low-latency collector (which gives a ~1-2ms max pause times on heaps of up to 16TB in JDK 16) was introduced in 11 and made production-ready in 15.

> Edit: also, did they replace the JIT with AOT?

Replace? Why would anyone want to do that? But there is an AOT compiler available: https://www.graalvm.org/reference-manual/native-image/

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