What is your z/OS configuration? Are both CFs in different machines and are z/OS LPARS running on both machines using both CFs? In that case, for Read requests on System Managed Duplexed Structures, XCF is smart enough to determine the nearest CF that will provide the best performance and retrieve the information from there. So this means that the distribution of the application(load) over the machines determines the load on both instances of duplexed structures and that this can change over time when structure access moves from machine to machine.
Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Mark Jacobs Sent: Friday, October 11, 2013 20:22 To: [email protected] Subject: Coupling Facility Structure Duplexing We're looking into moving to have all of our structures reside in a single coupling facility lpar, but have a second one configured as a hot standby, and as a target to move structures to when a planned outage of the primary CF is necessary. I know the answer is "It depends", but does anyone have an WAG on the CPU usage for the second CF lpar if we use it for structure duplexing only during normal operations. -- Mark Jacobs Time Customer Service Tampa, FL ---- The quiet ones are the ones that change the universe... The loud ones only take the credit. Londo Mollari - Babylon 5 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
