This appears to be updated as recent as a couple of months ago (March) -
https://en.wikipedia.org/wiki/Comparison_of_Java_virtual_machines
Not sure it discusses the differences very well, but certainly shows the
compatibilities and platforms.
Steve M.
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of John
Yeung
Sent: Friday, May 7, 2021 10:08
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Question on use of Amazon Corretto instead of Java for i
On Fri, May 7, 2021 at 9:20 AM Charles Wilt <charles.wilt@xxxxxxxxx> wrote:
Might consider pointing out that the IBM i uses IBM's J9 JVM, same as
what you can run with OpenJDK...
Well, the "official" JVM is HotSpot (developed by Sun and then Oracle). That
is the JVM that is part of the OpenJDK project, and thus it is the one that
the vast majority of OpenJDK-based[1] distributions use.
The OpenJ9 JVM is designed to be a drop-in replacement for HotSpot, but
there are subtle differences. Apparently, these differences are enough that
Amazon expressly does not support OpenJ9 with Corretto. If you use Corretto,
you are using HotSpot.
It really should be on the approved list...
I'm not completely sure what "it" means there (I guess "OpenJDK"?) but
Amazon does a good job of hyping up Corretto as "OpenJDK plus security and
performance improvements". (Of course, any tech company that is providing
their own OpenJDK-based distribution for production use is going to claim
that they have added their own security and performance
improvements.)
I do not have the expertise to evaluate the relative security of Corretto
versus other OpenJDK-based distributions. Maybe it's all hype. Maybe it
really is demonstrably more secure. Maybe Amazon did close up some security
holes but inadvertently opened up others.
John Y.
[1] I say "OpenJDK-based distributions" to avoid running afoul of Andrew's
chosen usage of the word "Java" but it's actually rather ridiculous to do
this. For all intents and purposes, ***EVERY*** current implementation of
Java-the-programming-language is based on OpenJDK. Even Oracle's own
commercial offering, the thing which Andrew is referring to as Java, is
based on OpenJDK.
--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit:
https://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives at
https://archive.midrange.com/midrange-l.
Please contact support@xxxxxxxxxxxxxxxxxxxx for any subscription related
questions.
Help support midrange.com by shopping at amazon.com with our affiliate link:
https://amazon.midrange.com
midrange.com
