The VVDS contains VVR and NVR records. VVR's describe VSAM data sets, while NVR's describe non-VSAM data sets.
--- [email protected] wrote: From: Greg Dyck <[email protected]> To: [email protected] Subject: Re: Internals of Catalog Date: Tue, 13 Sep 2016 15:13:37 -0500 On 9/13/2016 11:55 AM, Jake Anderson wrote: > Can some one please explain the Catalog internals with respect to the VVDS > and VTOC. At the 10,000 ft level... The catalog is a VSAM KSDS dataset that (mostly) points to the volume containing the dataset. The VTOC contains where on the volume, by cylinder and track, any datasets live, be they VSAM or non-VSAM. The VVDS contains VSAM unique information for any VSAM datasets that are contained in the VTOC. A VSAM catalog entry is actually a composite of the catalog, the VTOC, and the VVDS information merged together. Regards, Greg ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN _____________________________________________________________ Netscape. Just the Net You Need. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
