Re: i5/OS 32 or 64-bit ?

Careful! The O/S itself is 128bit and has been forever. It currently runs
on 64 bit hardware but all the pointers etc are all set for 128bits(16
bytes).

Now the JVMs out there are currently as you show. Prior to the J2SE 5 we
had only 64bit JVMs on the machine. With J2Se 5 on V5R4 we got a 'Tuned
and Ported' 32 bit version that ran considerably more quickly than the 64
bit version. With V6R1 that JVM also got 'Bored and Stroked' back to 64
bits and now we have the 32 bit performance in the 64 bit JVM. We also got
the Java SE 6 versions of both 32 and 64 bit JVMs.

- Larry

Larry Bolhuis IBM Certified Advanced Technical Expert -
System i Solutions
Vice President IBM Certified Systems Expert
Arbor Solutions, Inc. System i Technical Design and
Implementation V6R1





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Re: i5/OS 32 or 64-bit ?






Joe,

The OS is 64-bit. The JVM can either be 32 bit (runs with PASE out of
/QOpenSys) or classic 64 bit (no PASE, in /QIBM). The 32 bit java uses
less memory and loads quicker. Now add in 6.1 into the picture and you
have even more options.

5761JV1 6 Java Developer Kit 1.4 (64 bit classic)
5761JV1 7 Java Developer Kit 5.0 (64 bit classic)
5761JV1 8 J2SE 5.0 32 bit
5761JV1 9 J2SE 5.0 64 bit
5761JV1 10 Java Developer Kit 6 (64 bit classic)
5761JV1 11 Java SE 6 32 bit
5761JV1 12 Java SE 6 64 bit

Steve

> message: 5
> date: Wed, 27 Aug 2008 09:54:38 -0500
> from: Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>
> subject: i5/OS 32 or 64-bit ?
>
> I gotta admit, I was stumped today. Yeah, sure, common occurrence,
but
> this was in an area I thought I understood. I went to download MySQL
> for i5/OS today and it offered me two choices: SAVF for 32-bit and
SAVF
> for 64-bit POWER systems (it also offered TAR downloads for each).
>
> And that made me sit back. I was under the impression that we've
been
> running 64-bit machines forever. But we have a 32-bit JVM. My head
hurts!
>
> So, is PASE 32-bit or 64-bit? Or both? And why two versions of
MySQL?
>
> Joe