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: otto.schumac...@eds.com We deliver on our commitments so you can deliver on yours. -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Mark Zelden Sent: Wednesday, April 22, 2009 10:17 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Propagate systems enq On Wed, 22 Apr 2009 09:40:50 +0200, Vernooy, C.P. - SPLXM <kees.vern...@klm.com> wrote: > > >"Victor Zhang" <victor_wor...@yahoo.com.cn> wrote in message >news:<listserv%200904212358546839.0...@bama.ua.edu>... >> 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:mark.zel...@zurichna.com 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 lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
