The 'modern' practice is to use dynamically allocated system dump datasets. The only need for a SYS1.DUMP* dataset these days is to allow for taking an SVC dump in case dynamic allocation is damaged, i.e. the system is unable to allocate a dump data set. In that case, having one or two fixed data sets can allow you to capture a dump to diagnose DYNALLOC. OTOH that's probably an opportunity to try out your standalone dump procedures. ;-)
FYI our dynamically allocated dump data sets have block size 24960. That's determined by MVS, not us. . . JO.Skip Robinson Southern California Edison Company SHARE MVS Program Co-Manager 626-302-7535 Office 323-715-0595 Mobile [EMAIL PROTECTED] "Knutson, Sam" <[EMAIL PROTECTED]> Sent by: IBM Mainframe Discussion List <[email protected]> 02/08/2007 04:28 AM Please respond to IBM Mainframe Discussion List <[email protected]> To [email protected] cc Subject Re: SYS1.DUMP* dataset allocation The SYS1.DUMP* data sets here are allocated with a block size of 4160 but rarely used. SYS1.PARMLIB(COMMNDA1) - 01.76 Columns 00 ===> Scroll ********************************* Top of Data ************************ COM='DD ADD,SMS=(DATA=COMPRESS,MGMT=,STOR=) SMS MANAGE/COMPRESS DUMPS' COM='DD NAME=DSS.&SYSNAME..&JOBNAME..D&LYYMMDD..T&LHHMMSS..DMP&SEQ' COM='DD ALLOC=ACTIVE' COM='CD SET,SDUMP,MAXSPACE=8000M' There are a lot of advantages to using the dynamic allocation for SVC dump datasets. PARTIAL dumps become a rare occurrence, you can use SMS features like compression and striping to save space and improve dump performance, you don't require automation for dump archive and cleanup. Best Regards, Sam Knutson, GEICO Performance and Availability Management mailto:[EMAIL PROTECTED] (office) 301.986.3574 "Think big, act bold, start simple, grow fast..." -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Crispin Hugo Sent: Thursday, February 08, 2007 3:41 AM To: [email protected] Subject: SYS1.DUMP* dataset allocation Anybody any views / information on BLKSIZE of SYS1.DUMP datasets. Record size of 4160 , no probs. We are getting suggestions of 24960 or 29120 . I can't seem to find the IBM manual that tells me what IBM suggest. ---------------------------------------------------------------------- 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
