If I know we are NEVER going to share a catalog between systems, if we're still mainframe in 3 years I'll be surprised, then I could make the share options of our catalogs (3,3) and this would eliminate this additional checking?
>>> [EMAIL PROTECTED] 10/12/2005 3:17:49 PM >>> The DFSMS: Managing Catalogs manual says: quote "The Effect of Sharing Catalogs on Cache Usage If a catalog is defined with share options (3 4), and if it resides on a shared device, catalog management considers the catalog a shared catalog. A catalog is considered a shared catalog if it meets both of these conditions, even if it is not actually being shared among systems. Before each physical access to a shared catalog, special checking is performed to ensure that the ISC or CDSC contains current information. Checking also ensures that the access method control blocks for the catalog are updated in the event the catalog has been extended, or otherwise altered from another system. This checking maintains data integrity. It also affects performance because the VVR for a shared catalog must be read before using the ISC or CDSC version of the BCS record. Recommendation: To avoid catalog corruption, define a catalog volume on a shared UCB and set catalog share options to (3 4) on all systems sharing a catalog." unquote John Lang Central Coast Software -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] Behalf Of Bruce Black Sent: Wednesday, October 12, 2005 11:40 AM To: [email protected] Subject: Re: DASD genned as shared > > >OK, I know I could look it up in the book, but what are the share options on the catalog that would cause the additional processing? > I'd have to look it up, as well, so I'll let you do it <gr> -- Bruce A. Black Senior Software Developer for FDR Innovation Data Processing 973-890-7300 personal: [EMAIL PROTECTED] sales info: [EMAIL PROTECTED] tech support: [EMAIL PROTECTED] web: www.innovationdp.fdr.com ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
