Ted, et al, As far as I recall this was not a performance recommendation, it was a compromise. The intent was to save you from dedicating two volumes to the PLPA and Common, by coming up with a least impact way of putting them on the same pack. Note that there is a specific requirement to hand place the datasets on the volume in a way that reduced seek, and PLPA was small enough that the seldom ending channel programs to Common were not interrupted by PLPA page-in.
In terms of performance finesse a separate volume for PLPA and Common is better than a single volume. Now that all the latest and greatest storage can have Custom Volume Sizes there is no longer a need waste large amounts of space because PLPA and Common have dedicated volumes. Just slice out two volumes at the required size and use one for PLPA and one for Common, without the overflow method. The recommendation is still the best way to configure this compromise, but it remains a compromise. Your disk technology makes the single pack PLPA/Common unnecessary nearly 10 years ago, so why continue to do it. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Ted MacNEIL > Sent: Monday, 25 July 2005 8:00 AM > To: [email protected] > Subject: Re: ILR005E PLPA PAGE DATA SET FULL > > ... > Does anyone know why z/OS still requires separate PLPA and > common data sets? > ... > > We have a work-around? > There are more important things for IBM to work on? > > -teD > > In God we Trust! > All others bring data! > -- W. Edwards Deming > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- 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
