Re: CFLEVEL 16 and it's structure sizing
On Wed, 26 Nov 2008 22:35:13 -0800, Edward Jaffe [EMAIL PROTECTED] wrote: I guess, as long as the rule holds true that higher CF levels nearly always require the same or more storage, a lazy sysprog can't go wrong using the values provided by CFSIZER, so long as s/he doesn't run out of storage. In a short-on-storage situation, closer scrutiny would be advisable. Dunno about lazy, but simple economics do play...what's cheaper: Spending a few grand on some memory or wasting perfectly good sysprog cycles rearranging the deck chairs on the good ship Coupling Facility? Scott Fagen Enterprise Systems Management -- 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
Re: CFLEVEL 16 and it's structure sizing
Referring to: Scott Fagen [mailto:[EMAIL PROTECTED] donderdag , november 27, 2008 05:57 AM . From http://www-304.ibm.com/systems/support/z/cfsizer/ : CFSizer uses your input to calculate the number of structure objects the structure must contain, based on algorithms provided by the structure owners that model their use of the structure. Using these results and structure attribute information provided by the structure owners, CFSIZER THEN SUBMITS A CALCULATION REQUEST TO A COUPLING FACILITY, USING THE IXLCSP INTERFACE. The coupling facility itself calculates the structure size required to accommodate the specified input. Structure sizes therefore correspond to the CFLEVEL installed on the coupling facility that performs the calculations. THE CFLEVEL FOR WHICH THE RECOMMENDATIONS WERE CALCULATED IS DISPLAYED ON THE OUTPUT PAGE AND IS NOT SELECTABLE. Structure sizes are displayed in units of 1KB, as they would be entered in your CFRM policy. (emphases added) Hi Scott, That means you can't forecast structure size changes with CFSIZER when migrating from one level to another when you don't have already a CF at the new, higher level. I came across 'CFSizer Alternate Sizing Techniques' http://www-304.ibm.com/systems/support/z/cfsizer/altsize.html Method_2: The SIZER Utility Program (as-is unsupported!) In the accompanying document Dave Surman mentions: However, note that in order for the SIZER utility to be useful for this re-sizing purpose, you must already have provided a CF at the new ?uplevel? CFLEVEL in your installation, and it must be configured and active in your sysplex, with connectivity to the system on which the SIZER utility is being run. Conclusion: it seems there's no way to estimate future structure sizing requirements when having no access to a CF of the new/higher CFlevel?! Seems a bit strange to me. Is there no ROT when going to CFlvl 16 (as there once used to be one when migrating to CFlvl 12 if I recall well)? Jan -- 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
Re: CFLEVEL 16 and it's structure sizing
Scott Fagen wrote: On Wed, 26 Nov 2008 22:35:13 -0800, Edward Jaffe [EMAIL PROTECTED] wrote: I guess, as long as the rule holds true that higher CF levels nearly always require the same or more storage, a lazy sysprog can't go wrong using the values provided by CFSIZER, so long as s/he doesn't run out of storage. In a short-on-storage situation, closer scrutiny would be advisable. Dunno about lazy, but simple economics do play...what's cheaper: Spending a few grand on some memory or wasting perfectly good sysprog cycles rearranging the deck chairs on the good ship Coupling Facility? I agree. And, for the record, I consider myself to be a lazy sysprog. I have better things to do than micro-manage system configurations. I over-allocate everything. To that end, our default region size is 256MB and default MEMLIMIT is 2G! -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.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
Re: CFLEVEL 16 and it's structure sizing
And please remember to have enough memory for failover from other CFs. Same for enough processor power. Most folks believe a CF won't fail. If you are brave enough to believe that for your mission critical data sharing applications, then no problem. BUT... -Original Message- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Scott Fagen Sent: Thursday, November 27, 2008 SYSN 07:58 AM To: IBM-MAIN@bama.ua.edu Subject: Re: CFLEVEL 16 and it's structure sizing On Wed, 26 Nov 2008 22:35:13 -0800, Edward Jaffe [EMAIL PROTECTED] wrote: I guess, as long as the rule holds true that higher CF levels nearly always require the same or more storage, a lazy sysprog can't go wrong using the values provided by CFSIZER, so long as s/he doesn't run out of storage. In a short-on-storage situation, closer scrutiny would be advisable. Dunno about lazy, but simple economics do play...what's cheaper: Spending a few grand on some memory or wasting perfectly good sysprog cycles rearranging the deck chairs on the good ship Coupling Facility? Scott Fagen Enterprise Systems Management -- 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
CFLEVEL 16 and it's structure sizing
Hi, https://www-304.ibm.com/jct03001c/systems/z/advantages/pso/cftable.html just mentions CFLEVEL 16 is (or will be ?) available on 2098 z10 BC EC N10964 (Driver 76G) MCL 001 It doesn't even contain some info on what CFlvl16 is about? Is there already CFlvl16 information available? What about structure sizing? No techdoc yet? No ROT yet? Will the CFSIZER be the only source of info about sizings? Has the CFSIZER already been updated? Jan -- 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
Re: CFLEVEL 16 and it's structure sizing
Jan Vanbrabant [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]... Hi, https://www-304.ibm.com/jct03001c/systems/z/advantages/pso/cftable.html just mentions CFLEVEL 16 is (or will be ?) available on 2098 z10 BC EC N10964 (Driver 76G) MCL 001 It doesn't even contain some info on what CFlvl16 is about? Is there already CFlvl16 information available? What about structure sizing? No techdoc yet? No ROT yet? Will the CFSIZER be the only source of info about sizings? Has the CFSIZER already been updated? Jan I received information from the ITSO roadshow last week, but I don't know where the official announcement is. Some hilites: - Performance enhancementes for System Managed Duplexed Structures - Shared Q enhancements: eliminate false scheduling - Structure size increases, not for CFlvl 16 itself, but as a positioning for CFlvl 17. - CFSIZER is now running at CFlvl 16 level. Kees. ** 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: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: CFLEVEL 16 and it's structure sizing
Jan Vanbrabant wrote: Has the CFSIZER already been updated? Yes. The CFSIZER has been updated for CF level 16. How do people running earlier CF levels do their sizing? I did not see an entry field for the CF level... -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.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
Re: CFLEVEL 16 and it's structure sizing
On Wed, 26 Nov 2008 07:58:34 -0800, Edward Jaffe [EMAIL PROTECTED] wrote: -snip- How do people running earlier CF levels do their sizing? I did not see an entry field for the CF level... That's an exercise left to the reader: From http://www-304.ibm.com/systems/support/z/cfsizer/ : CFSizer uses your input to calculate the number of structure objects the structure must contain, based on algorithms provided by the structure owners that model their use of the structure. Using these results and structure attribute information provided by the structure owners, CFSIZER THEN SUBMITS A CALCULATION REQUEST TO A COUPLING FACILITY, USING THE IXLCSP INTERFACE. The coupling facility itself calculates the structure size required to accommodate the specified input. Structure sizes therefore correspond to the CFLEVEL installed on the coupling facility that performs the calculations. THE CFLEVEL FOR WHICH THE RECOMMENDATIONS WERE CALCULATED IS DISPLAYED ON THE OUTPUT PAGE AND IS NOT SELECTABLE. Structure sizes are displayed in units of 1KB, as they would be entered in your CFRM policy. (emphases added) I'd suggest honing your IXLCSP skills...start with (mind any line breaks that may be inserted): http://publib.boulder.ibm.com/infocenter/zos/v1r9/index.jsp?topic=/com.ibm.zos.r9.ieai600/usecsp.htm Scott Fagen Enterprise Systems Management -- 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
Re: CFLEVEL 16 and it's structure sizing
Scott Fagen wrote: On Wed, 26 Nov 2008 07:58:34 -0800, Edward Jaffe [EMAIL PROTECTED] wrote: -snip- How do people running earlier CF levels do their sizing? I did not see an entry field for the CF level... That's an exercise left to the reader: From http://www-304.ibm.com/systems/support/z/cfsizer/ : CFSizer uses your input to calculate the number of structure objects the structure must contain, based on algorithms provided by the structure owners that model their use of the structure. Using these results and structure attribute information provided by the structure owners, CFSIZER THEN SUBMITS A CALCULATION REQUEST TO A COUPLING FACILITY, USING THE IXLCSP INTERFACE. The coupling facility itself calculates the structure size required to accommodate the specified input. Structure sizes therefore correspond to the CFLEVEL installed on the coupling facility that performs the calculations. I guess, as long as the rule holds true that higher CF levels nearly always require the same or more storage, a lazy sysprog can't go wrong using the values provided by CFSIZER, so long as s/he doesn't run out of storage. In a short-on-storage situation, closer scrutiny would be advisable. -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.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
