At z/OS 1.9 only one multisystem sysplex can exist in any GRS ring complex.
I think when people discuss serialization between sysplexes they usually mean multisystem sysplexes. The answer to Victor's original question is "it depends." If you want to serialize resources between multisystem sysplexes then you need to use MIM Integrity. If you want to share between a multisystem sysplex and one or more single system sysplexes (XCFLOCAL, MONOPLEX) then use MIM Integrity or GRS ring with the appropriate link design. Since PDSE dataset access cannot be serialized across sysplexes the solution for sharing HSC resources across sysplexes requires some careful planning and trade off decisions. On Thu, Apr 23, 2009 at 1:40 PM, Mark Zelden <[email protected]> wrote: > > Wrong! As I wrote, GRS ring supports it. How do you think people shared > DASD prior to MVS/ESA 4.2? Performance may be poor compared to > MII (especially once you get past 2 or 3 systems), but it works. > > Mark > -- > Mark Zelden > Sr. Software and Systems Architect - z/OS Team Lead > Zurich North America / Farmers Insurance Group - ZFUS G-ITO > mailto:[email protected] > z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ > Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html > > > > > > On Thu, 23 Apr 2009 10:03:51 -0400, Schumacher, Otto > <[email protected]> wrote: > > >At the current time GRS does not support Enq propagation across > >SYSPLEXES. However MIM/DASD does. > > > >Regards > > > >Otto Schumacher > >Technical Support, CICS > > > >EDS, an HP Company > >Ahold Account > >2000 Wade Hampton Blvd. > >LC1-302 > >Greenville, South Carolina, 29615 > > > >Tel: 864 987-1417 > >Fax: 864 987-4500 > >E-mail: [email protected] > > > >We deliver on our commitments > >so you can deliver on yours. > > > > > > > >-----Original Message----- > >From: IBM Mainframe Discussion List [mailto:[email protected]] On > >Behalf Of Mark Zelden > >Sent: Wednesday, April 22, 2009 10:17 AM > >To: [email protected] > >Subject: Re: Propagate systems enq > > > >On Wed, 22 Apr 2009 09:40:50 +0200, Vernooy, C.P. - SPLXM > ><[email protected]> wrote: > > > >> > >> > >>"Victor Zhang" <[email protected]> wrote in message > >>news:<listserv%[email protected]>... > >>> Hi experts, > >>> One of software will use a dataset to store locking information. The > >>> software uses SYSTEMS enq to get exclusive use of the dataset. > >>> The software is storagetek's library station, and the manual said: > >>> To prevent the corruption of the PDF, LibraryStation issues a SYSTEMS > >>ENQ. The > >>> ENQ QNAME is the HSC ENQ QNAME specified by the MAJNAME parameter of > >>> the HSC LIBGEN. The ENQ RNAME is LS:ACTIVE. > >>> If you make LibraryStation software available to more than one host, > >>you are > >>> responsible for propagating the SYSTEMS ENQ to each host. This can be > >>done via > >>> Global Resource Serialization (GRS) or a functionally equivalent > >>product. > >>> > >>> My question is: > >>> If more than one software instance started up on other lpars which > >are > >>not > >>> in same sysplex, how can systems enq be properly propagating? > >>> > >>> Regards > >>> Victor > >>> > >> > >>The product that can do that is CA-MIM. A MIM-plex can span sysplexes. > >>Doesn't is also issue a Reserve? That's how you normally protect your > >>datasets over systems. > >> > > > >And even if the sharing can be done with MIM, at least for the CDS it > >is recommended to use RESERVE (unless you want your tape processing > >to slow down and cause a problem). IOW, don't convert the RESERVE > >to an ENQ unless you are in a single sysplex and using GRS STAR or > >MIM control file in a CF. > > > >Since the RNAME is different, you can just propagate that qname/rname, > >but it still requires MIM (MII) to do it across sysplex boundaries. > >Well, > >that isn't really true...you actually can do it with GRS Ring also. How > >many > >systems are involved here? Do you run GRS already? > > > >So I would check the doc again or ask Oracle/Sun/STK . :-) > > > >Mark > >-- > >Mark Zelden > >Sr. Software and Systems Architect - z/OS Team Lead > >Zurich North America / Farmers Insurance Group - ZFUS G-ITO > >mailto:[email protected] > >z/OS Systems Programming expert at > >http://expertanswercenter.techtarget.com/ > >Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.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 > > > >---------------------------------------------------------------------- > >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 ---------------------------------------------------------------------- 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
