Re: Java Overload? Are all of these really necessary?

In V6R1 the new default JVM in i5/OS V6R1 is now the 32-bit JVM using Java
5. In prior releases, the 64-bit a**classica**JVM was the default.

i5/OS V5R4:
a**64-bit Classic JVM (default JVM is Classic 1.4)
a**Classic 1.3, 5.0, and 6.0
a**32-bit IBM Technology for Java JVM

i5/OS V6R1:
a**64-bit Classic JVM supports Java versions 1.4, 5.0, and 6.0
a**32-bit IBM Technology for Java 5.0 (JDK V1.5) (default JVM in V6R1)
a**64-bit IBM Technology for Java 6.0 (JDK V1.6)

I would not remove any versions as the others have stated.
The 32-bit loads faster, but after initial load I have not noticed much of
a performance difference.
This can vary based on what the application is doing.

Steve

> message: 3
> date: Mon, 15 Sep 2008 13:59:24 -0700
> from: "nike @dslextreme.com" <nike@xxxxxxxxxxxxxx>
> subject: Java Overload? Are all of these really necessary?
>
> Hi All,
>
> In reviewing our Licensed Programs after our upgrade to V6R1, I noticed
that
> we have a lot of Java-related Licensed Programs.
>
> 5761JV1 *COMPATIBLE IBM Developer Kit for Java
> 5761JV1 *COMPATIBLE Java Developer Kit 1.4
> 5761JV1 *COMPATIBLE Java Developer Kit 5.0
> 5761JV1 *COMPATIBLE J2SE 5.0 32 bit
> 5761JV1 *COMPATIBLE J2SE 5.0 64 bit
> 5761JV1 *COMPATIBLE Java Developer Kit 6
> 5761JV1 *COMPATIBLE Java SE 6 32 bit
> 5761JV1 *COMPATIBLE Java SE 6 64 bit
> This leads me to a few questions:
> 1) How can I tell which Java environment will be used by default?
> 2) Do we really need to have 4 JDKs and 4 SEs?
> 3) If not, is it safe to only keep the version 6 releases?
> 4) I know I read something about the 64 bit version being slower than
the
> 32 bit, I assume the 64 bit can go away too?
>
> I did some searching and did not find any info on dependencies, etc...
>
> Thoughts?
> Thanks,
> JD