On Fri, 2 Sep 2005 14:03:24 -0400, Bruce Black wrote: >> >>You don't mention whether you have MIM available to span ENQs across your >>plexes, so I'll presume that you don't. If that is correct, then you >>should NOT share a sysres across plexes since you will not have data set >>integrity from one plex to the next. >> >Not true. Old GRS Ring mode (CTCs) will work across sysplexes. > >GRS Star mode (CFs) works only within a sysplex. > >Star mode is much more efficient than ring mode, but if you got multiple >plexes, ring will work
He's got three pairs of systems... ring is less than wonderful for that and ring disruption of his production sysplex for a test system IPL would be far less than wonderful. (Been there, done that.) I won't recommend a 6-way ring to protect a single sysres. It is a tiny amount of DASD to create a couple of additional IPL volumes... why impact his users' world for that?? Also, the single-sysres idea is not so good for the reasons mentioned in my subsequent post. He ought to match his sysres to his sysplex's stated purpose for quality reasons. -- Tom Schmidt Madison, WI ---------------------------------------------------------------------- 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
