Again, I'm going to guess that you are not currently sharing anything like DASD or tape between the lpars. So, I'm guessing starting up GRS on each lpar and running a GRS environment will be new to you. I have not started up a new GRS environment in a very long time.
My first suggestion is to keep thing as simple as possible. So, my second suggestion is to just go with the CTCs. If I recall you can start with GRS controlling the CTCs. After you get comfortable with GRS in a RING you can look at using XCF signaling over the CTCs to pass the needed information. Using XCF signaling can reduce some of the work that GRS has to do. XCF in itself can bring in some addition things that you need to think about. There are things that happen somewhat automatically when software sees an XCF environment. Paul -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Allan Staller Sent: Thursday, June 20, 2024 10:52 AM To: [email protected] Subject: Re: GRS in MONOPLEX without physical CTCs ? Classification: Confidential In that case, for safety, each LPAR should have a cop of the software (unless yu can guarantee read-only. Otherwise a homegrown serialization mechanism, or CA-MIM would be required -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of MANCINI Frédéric (80) Sent: Thursday, June 20, 2024 9:03 AM To: [email protected] Subject: Re: GRS in MONOPLEX without physical CTCs ? [CAUTION: This Email is from outside the Organization. Unless you trust the sender, Don’t click links or open attachments as it may be a Phishing email, which can steal your Information and compromise your Computer.] Several lpars, each configured as a MONOPLEX, with GRS=NONE, will use the software. I understand that we would need either physical CTCs or a "coupling facility lock structure". Does this have to be a separate physical component ? ------------------------------------------------------------------------ *De :* Paul Feller [mailto:[email protected]] *Envoyé :* jeudi 20 juin 2024 à 15:42 *Pour :* [email protected] *Objet :* GRS in MONOPLEX without physical CTCs ? > I pasted below information from the “MVS Planning: Global Resource > Serialization” manual for z/OS 2.5. So based on what the manual says you > need to have CTCs that GRS will manage. Just out of curiosity is there going > to be more then one lpar using this software? > > > How global resource serialization works. > Depending on the level of z/OS and XCF environment the systems are running > in, sysplex or non-sysplex, a global resource serialization complex consists > of one or more systems: > > • Connected to each other in a ring configuration through: > – XCF signaling paths, through CTC or coupling facility > – Global resource serialization managed channel-to-channel (CTC) adapter > - Systems in the same sysplex must use XCF signaling > - Non-sysplex or monplex systems must use GRS-managed CTCs to > communicate > > • Connected to each other in a star configuration through: > – XCF signaling paths, through CTC or coupling facility > – A GRS coupling facility lock structure > > > Paul > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On > Behalf Of Mark Jacobs > Sent: Thursday, June 20, 2024 8:06 AM > To: [email protected] > Subject: Re: GRS in MONOPLEX without physical CTCs ? > > Being in a monoplex I assume no. > > Mark Jacobs > > Sent from ProtonMail, Swiss-based encrypted email. > > GPG Public Key - > https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapi. > protonmail.ch%2Fpks%2Flookup%3Fop%3Dget%26search%3Dmarkjacobs%40proton > mail.com&data=05%7C02%7Callan.staller%40hcltech.com%7C6668a87cf35c48aa > 054308dc9131caae%7C189de737c93a4f5a8b686f4ca9941912%7C0%7C0%7C63854489 > 0267246816%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzI > iLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=oukC6i72u3ClyMa7xUY > 0x9i4VoKxqmjsWbcnK6O5Ze0%3D&reserved=0 > > > On Thursday, June 20th, 2024 at 9:04 AM, Seymour J Metz <[email protected]> > wrote: > >> Do you have a CF LPAR? >> >> -- >> Shmuel (Seymour J.) Metz >> https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmaso >> n.gmu.edu%2F~smetz3&data=05%7C02%7Callan.staller%40hcltech.com%7C6668 >> a87cf35c48aa054308dc9131caae%7C189de737c93a4f5a8b686f4ca9941912%7C0%7 >> C0%7C638544890267257888%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL >> CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=V775 >> zQs4tj6pHDzGU%2BkbtDJxPSkufvquAJXOMEbNZb4%3D&reserved=0 >> עַם יִשְׂרָאֵל חַי >> נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר >> >> ________________________________________ >> From: IBM Mainframe Discussion List [email protected] on >> behalf of MANCINI Frédéric (80) >> [email protected] >> >> Sent: Thursday, June 20, 2024 8:29 AM >> To: [email protected] >> Subject: GRS in MONOPLEX without physical CTCs ? >> >> Hello, >> >> We recently acquired TACM (Tivoli Adanced Catalog Management). >> >> To use its "MERGECAT WHILE-OPEN" functionality, we would have to >> properly configure GRS (we presently have GRS=NONE in IEASYSxx). >> >> I set GRS=START and GRSRNL=00 in IEASYSxx, but when I IPL the system >> I get the following message : >> >> ISG157D SYSTEM IN MONOPLEX MODE WITH NO GRS CTC DEFINITIONS. RELOAD >> THE SYSTEM OR REPLY NONE TO CONTINUE THE IPL. >> >> Is it possible to configure GRS on a MONOPLEX without physical CTCs ? >> >> Regards, >> >> Frederic Mancini >> >> --------------------------------------------------------------------- >> - For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO >> IBM-MAIN >> >> >> --------------------------------------------------------------------- >> - For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO >> IBM-MAIN > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ::DISCLAIMER:: ________________________________ The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ________________________________ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
