Re: JDK for my PC.

Hello Rob,

JRE vs JDK
If you're going to use Java just for ACS, all you need is the JRE, not the
JDK. Also, Normal is all you need, not Large Heap.

MSI vs ZIP
This just depends on how you prefer to deploy the JRE. If you're installing
on Windows machines, you can use the MSI. It will give you a typical
installation that can be removed via the Control Panel. It can also can be
deployed via Group Policy, so that could be a help for your Active Directory
Domain Admin. If you prefer to bundle the JRE with ACS upon deployment, then
download the ZIP and unzip it to the following path
./Start_Programs/Windows_x86-64, as described here
(https://www.ibm.com/support/pages/node/792205). When you deploy ACS with
the script, it will copy the JRE to the necessary path.

OpenJ9 vs HotSpot (and AdoptOpenJDK)
I've been using the OpenJ9 JVM. I could've sworn I had issues at one point
with the HotSpot JVM and ACS, so I just stuck with OpenJ9. That could no
longer be an issue. With regards to AdoptOpenJDK, see my last post for a
quick primer on where to get your Java Runtime:
https://archive.midrange.com/midrange-l/202109/msg00095.html. Long story
short, if you want to continue using the OpenJ9 JVM, start getting it from
IBM's Semeru Runtime, as AdoptOpenJDK will no longer release updates for
OpenJ9. The AdoptOpenJDK page is going away soon, and they are already
listing the Semeru Runtimes for OpenJ9. From the AdoptOpenJDK website:
"*Semeru Runtimes releases are provided by IBM. Please consume these
binaries from developer.ibm.com going forward."


------------
Jacob
------------

-----Original Message-----
date: Mon, 20 Sep 2021 19:40:25 +0000
from: Rob Berendt <rob@xxxxxxxxx>
subject: RE: JDK for my PC.

Roberto,
I'm not a developer (at least for Java).

From the site you recommended, do I download the JDK or the JRE?

And do I pull down the zip or the msi?

Rob Berendt