Hello Mark, Just curious as to what the drivers are behind changing your configuration from a balanced one between two CFs vs. keeping everything in one and failing everything over to 2nd CF if/when necessary. Is it strictly performance related?? Curious because we have been running in a "balanced" 2 CF environment for many years.
Thank you, Mike Bernard | z/OS Engineer Team Lead | GTI ECS Enterprise Software Engineering (ESE) or Extreme Software Engineering J.P. Morgan Chase & Co. | 1111 Polaris Pkwy, Columbus, OH 43240, US | Office: 614-213-5768 | Cell/pager: 614-406-1045 | Fax: 614-213-4171 (michael.j.bern...@jpmchase.com) -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Mark Jacobs Sent: Friday, October 11, 2013 3:09 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Coupling Facility Structure Duplexing We're currently running two CF lpars, with about 1/2 of the structures in each CF, and where appropriate we're already duplexing selected structures. So, my question really is, is the CPU time needed to manage the duplexed structure the same as, greater than, or less than the amount of time needed for the primary structure? To make the question even harder, I'm not asking about zOS CPU time, but ICF CPU time. Mark Jacobs On 10/11/13 14:56, Mark Zelden wrote: > On Fri, 11 Oct 2013 14:21:47 -0400, Mark Jacobs <mark.jac...@custserv.com> > wrote: > >> 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. >> > (disclaimer... I have no real world experience / measurements to go from > - hopefully someone who is duplexing will answer or Mark Brooks). > > If you duplexed 100% of the structures, my SWAG would be that the CPU > usage for the 2nd CF would be the same as the primary CF, but that CPU > usage would of course increase due to the overhead / coordination of > duplexing. > > An installation guide to duplexing rebuild: > http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/iea2f1c2/4. > 3?SHELF=all13be9&DT=20120814144655 > > I assume you really wouldn't do "all" structures. > > Deciding whether to duplex a structure: > http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/iea2f1c2/4. > 3.2?SHELF=all13be9&DT=20120814144655 > > Mark > -- > Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS > mailto:m...@mzelden.com ITIL v3 Foundation Certified Mark's MVS > Utilities: http://www.mzelden.com/mvsutil.html > Systems Programming expert at > http://search390.techtarget.com/ateExperts/ > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > -- 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is proprietary, privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
