A small caveat for your recommendation of 59 volumes. It does cost something to have 59 volumes for everything. It greatly reduces the total number of data sets you can have in your JCL. If all data sets only have a single DD you can have 3,273 DD's. If all data sets are defined with 59 volumes the limit drops to 259 DD's. This is if you specify TIOT SIZE(64) in the ALLOCxx member. If you specify a smaller SIZE the numbers go down proportionally.
DB2 utilities being used on a partitioned object can require a significant number of DD's for optimum performance. Chris Blaicher BMC Software, Inc. The opinions expressed are mine, not BMC's. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Ted MacNEIL Sent: Wednesday, March 26, 2008 4:38 PM To: IBM-MAIN@bama.ua.edu Subject: Re: Displaying multiple volumes allocated from DSLIST >It's just showing that you have 2 additional candidate volumes allocated. They have not yet been assigned. It's a control block thing. It doesn't cost anything; it can protect you from future growth problems. The last two shops I worked at had 20 volumes allocated in most dataclasses. I would recommend the 59 vol max. It doesn't cost; it can save. Especially, since only the secondary allocation size is 'remembered' on all future volumes. - Too busy driving to stop for gas! ---------------------------------------------------------------------- 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
