And Redbook authors really only know/write about the facts they know from doing the effort they set out to do, they are not updated as time goes on to be living documents. Some Redbooks get updates if the authors are till around and have the time, but not advances in general. So there may be other things that can use a zAAP these days that will not get retrofitted into the Redbook. IBM is allowed to authorize other users to take advantage of the zAAP and zIIP.
You should try and contact an author of the Redbook to ask what they mean if you want the best answer. They may not subscribe to IBM-MAIN, but often list a way to contact them in the Redbook. While I could make the assumption something in the IP stack uses JAVA, the developers are the ones who really know. On Fri, 27 Jun 2008 12:52:09 -0400, Knutson, Sam <[EMAIL PROTECTED]> wrote: >Hi Dennis, > >I think the author is talking about the benefit of running the Websphere >J2EE stack local on z/OS rather than off platform. You save by not >having to talk to a web server/app server across the LAN or WAN that is >on another box maybe traverse a firewall or two instead you go directly >from some z/OS transaction manager to Websphere on z/OS. At worst case >hopefully between LPARs in the same CEC. > >zIIP engines however are enabled for much more than Java and priced the >same as zAAP engines. > > Best Regards, > > Sam Knutson, GEICO > >-----Original Message----- >From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On >Behalf Of Longnecker, Dennis >Sent: Friday, June 27, 2008 12:38 PM >To: IBM-MAIN@BAMA.UA.EDU >Subject: zAAP engine Benefit Question > >In the March 2008 Redbook title "System Programmer's Guide to: Workload >Manager" it has a section that reads: > >---- >3.6.3 zSeries Application Assist Processor (zAAP) > >The benefits of using a zAAP processor to execute Java code are saving >CPU cycles in IP stacks and in the firewalls due to the connectivity >simplification. >---- > >I understand the JVM is the only authorized zAAP user. Does the above >part from the manual imply that the IP stack and firewalls are written >in JAVA, thus the CPU savings? And, what is the connectivity >simplification being referenced? > >Thanks, Dennis > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
