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
