As I understand it, NUP is the change since the data set was created where as DUP is the change since open. I've always used DEP, DRE, DIN, DDE and DUP to determine activity by a specific job step.
As an fyi, the type 42-6 records have a fairly new field which is the read I/O count, so you can compare that to the total I/O count to see if there were any write I/Os. Have a nice day, Dave Betten z/OS Performance Specialist Cloud and Systems Performance IBM Corporation email: [email protected] 1-720-396-3882 IBM Mainframe Discussion List <[email protected]> wrote on 04/26/2017 10:18:52 AM: > From: James Chambers <[email protected]> > To: [email protected] > Date: 04/26/2017 10:19 AM > Subject: Re: Differences Between SMF64NUP and SMF64DUP > Sent by: IBM Mainframe Discussion List <[email protected]> > > Hi, > > It is running against all the SMF records, the only ones in the > output are 42 sub type 6, 64 and 66 record types. > > Thanks > > James > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
