Classification: Public The "platinum" (or <insert precious metal here>) build says to have a single master cat for all systems in a sysplex. Now I get that not everything is a sysplex, but where it is, take caution.
Where you have master cats for other systems as user cats, there's a big red flag - the system won't let you delete the active master cat for the system you're on (you get IDC3009I, RC 90, RSN 2), but nothing stops you deleting a user cat that is also the master cat for another system. Once that "user cat" has been deleted, the other system very quickly decides that it can no longer continue life. (page datasets, from memory, are what it complained about first..) Andy Styles z/Series System Programmer -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Paul Gilmartin Sent: 26 September 2018 15:27 To: [email protected] Subject: Re: Master cats as user cats on other systems - why? -- This email has reached the Bank via an external source -- On Wed, 26 Sep 2018 14:09:48 +0000, Allan Staller wrote: >I tend to generally concur w/Brian, but I do want to add an observation. > >Any time there are (three of something) vs (one of something) you are (almost >certainly) guaranteed to the one or more of the three, out of sync. >Correction of "out of sync" conditions is generally painful and involves a >great deal of research and time to correct. > >Or to say the above in the short and sweet manner: >Two or more of something that don't agree, is worse than having nothing. > “never go to sea with two chronometers, take one or three” -- The Mythical Man-Month https://blog.ipspace.net/2017/01/never-take-two-chronometers-to-sea.html >The above being said, most "out of sync" conditions can be prevented by >application of appropriate operational discipline. >It has been my experience that very few shops employ appropriate operational >discipline. > >For this reason, I lean towards shared, rather than separate. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Lloyds Banking Group plc. Registered Office: The Mound, Edinburgh EH1 1YZ. Registered in Scotland no. SC95000. Telephone: 0131 225 4555. Lloyds Bank plc. Registered Office: 25 Gresham Street, London EC2V 7HN. Registered in England and Wales no. 2065. Telephone 0207626 1500. Bank of Scotland plc. Registered Office: The Mound, Edinburgh EH1 1YZ. Registered in Scotland no. SC327000. Telephone: 03457 801 801. Lloyds Bank Corporate Markets plc. Registered office: 25 Gresham Street, London EC2V 7HN. Registered in England and Wales no. 10399850. Lloyds Bank plc, Bank of Scotland plc and Lloyds Bank Corporate Markets plc are authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and Prudential Regulation Authority. Halifax is a division of Bank of Scotland plc. HBOS plc. Registered Office: The Mound, Edinburgh EH1 1YZ. Registered in Scotland no. SC218813. This e-mail (including any attachments) is private and confidential and may contain privileged material. If you have received this e-mail in error, please notify the sender and delete it (including any attachments) immediately. You must not copy, distribute, disclose or use any of the information in it or any attachments. Telephone calls may be monitored or recorded. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
