> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of (IBM Mainframe > Discussion List) > Sent: Tuesday, September 12, 2006 11:44 AM > To: [email protected] > Subject: Re: Question : VTOC size - JES2 Volume >
<snip> > If you're going to have only a one-track VTOC in cylinder 0 > and the rest of > the volume dedicated to SYS1.HASPACE allocated by cylinders, > why not put a > small VTOC index in cylinder 0 along with the small VTOC? > There might be a > metadata reason why it's better to have an indexed VTOC on > all volumes. E.g., > some day all volumes might have to be SMS-managed. > > Speaking of VTOC hits, does SDSF hit the VTOC when a SYSOUT > access begins? > > Bill Fairchild ARG! Yes, I am fairly sure that it does. That's why SDSF is APF authorized. So it can bypass any RACF restrictions on opening HASPACE and HASPCKPT. But I still maintain that if the volume only has a single, permanent, dataset (regardless of what the dataset is), then an INDEX is totally unnecessary unless the volume is SMS managed. I can see this scenario for volumes in a DB2 storage group (few datasets, rarely created, but SMS managed). -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- 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
