Can i call this zAPP processor as a java coprocessor ?
| "Davis, Larry"
<[EMAIL PROTECTED]>
Sent by: Linux on 390 Port <[EMAIL PROTECTED]> 05/14/04 08:05 PM
|
|
Think of a zAAP as an attached processor for the JVM working on your system.
AFAIK they are only available on the z-890 and z-990 processors and you have
to have z/OS 1.6 or above. The JVM can determine if you have a zAAP and use
it if it is available. Because the zAAP is not a CP your regular OS can't
use it and your software cost do not rise with the added MIPS. The third
party software costs are the greatest benefit.
I hope IBM is working on the Websphere JVM, running under Linux on zSeries,
to take advantage of the zAAP also.
Larry Davis
-----Original Message-----
From: James Tison [mailto:[EMAIL PROTECTED]
Sent: Friday, May 14, 2004 10:28 AM
To: [EMAIL PROTECTED]
Subject: Re: Websphere on Linux
As soon as I'd heard about it, I went to go research it as best I could.
Personally, I have to admit I was a bit disappointed. I was hoping for
better.
AFAIK, this is all public domain knowledge; but I'm going to stay away from
details that I fear might not be -- I like my job. Usual
disclaimer: I don't officially speak for IBM here -- I am not connected with
Java, z/OS, or zSeries hardware development as a matter of my job.
The zAAP is just a normal zSeries CPU dedicated & managed by the OS (z/OS
V1R6+ only, as the poster below points out) to Java tasks. It provides no
known performance benefit on a side-by-side address space comparison
relative to a normal zSeries CPU. The zAAP does NOT implement any new
hardware/mcode instructions to support JVM execution. As always, whether or
not the zAAP will benefit you will depend on your workload, and this is
where I have to stop.
Contact your IBM account representative if you'd like to see the tech sales
support materials; or if you have any speculative-level questions you'd like
answered.
Regards,
--Jim--
James S. Tison
Senior Software Engineer
TPF Laboratory / Architecture
IBM Corporation
"If dogs don't go to heaven, then, when I die, I want to go where they do."
-- Will Rogers
Linux on 390 Port <[EMAIL PROTECTED]> wrote on 05/14/2004 10:10:06:
>
> Can somebody theow some light on this zAAP processor ?
>
>
>
> Franz Josef Pohlen <[EMAIL PROTECTED]>
> Sent by: Linux on 390 Port <[EMAIL PROTECTED]>
> 05/14/04 07:37 PM
>
> Please respond to
> Linux on 390 Port <[EMAIL PROTECTED]>
>
> To
>
> [EMAIL PROTECTED]
>
> cc
>
> Subject
>
> Re: Websphere on Linux
>
>
>
>
> Hi,
>
> the zAAP processor will only work with zos 1.6 and above, - nothing
> else
.,
> coming in september, I believe. The problem is that even IBMers ask
> themselves, which customer will need this. IBM has told everyone to
> consolidate his applications on zlinux using its really good internet
> capabilities. They have developed dozens of connectors to the data
> components on zos (DB2, CICS, IMS etc) Now they tell them to run
websphere
> applications on zos with zAAPs. I would prefer zlinux on IFLs using
> hipersockets for communication to zos, because I think linux is the
better
> unix than USS on zos and will get even better in future development of
hard-
> and software.
>
> FJ
>
> ----- Original Message -----
> From: "McKown, John" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, May 14, 2004 2:53 PM
> Subject: Re: Websphere on Linux
>
>
> > > -----Original Message-----
> > > From: Phil Payne [mailto:[EMAIL PROTECTED]
> > > Sent: Friday, May 14, 2004 5:15 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Websphere on Linux
> > >
> > >
> > > It depends now on the size of the machine and whether zAAPs would
> > > be financially justifiable.
> > >
> > > There is no simple answer.
> > >
> >
> > Speaking of zAAPs, does anybody know if Linux will be able to take
> advantage
> > of them? Or is it viewed a unnecessary by IBM? I can see where they
might
> be
> > of use if somebody is running Linux on a standard CP instead of an
> > IFL
for
> > some reason. But, then, it might be better to just get an IFL.
> > Except
that
> a
> > zAAP, I think, could be shared with z/OS and/or z/VM whereas an IFL
cannot
> > be.
> >
> >
> > --
> > John McKown
> > Senior Systems Programmer
> > UICI Insurance Center
> > Applications & Solutions Team
> >
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