Allan, "technopolitical" is the exact reason for asking. I am trying to take political out of it, to get down to the technical reasons for single vs multiple.
Single seems the logical direction to go. _________________________________________________________________ Dave Jousma Assistant Vice President, Mainframe Services [email protected] 1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f 616.653.2717 -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Staller, Allan Sent: Thursday, October 27, 2011 1:30 PM To: [email protected] Subject: Re: DFHSM questions I would go with 1 HSMplex unless the technopolitical factors contraindicate! YMMV. Short version: 1) Multiple HSMplexes are allowed. Depend's on your needs. (I have no experience w/multiple HSMPLEX's). Probably also depends on your GRS configuration, catalog sharing,..... If you do run multiple HSMplexes, each member of the HSMplex must share the associated control datasets. 2) Each image will run a copy of DFHSM. At least 1 image will run another task (DFHSMP). DFHSM tasks handle command tasks i.e. individual dataset migration/recall. DFHSMP handles automatic (HSM scheduled) tasks. i.e. backup, space management, etc.... See http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DGT2I480/CCON TENTS?SHELF=DGT2BK90&DN=SC35-0418-10&DT=20090605105438 Section 2 Customizing DFHSM Topic 2.1 HSM in a SYSPLEX environment. HTH, <snip> Quick question(s). In a multi-image environment, where all systems are part of the same sysplex(some systems production, some DEV, but all in the same sysplex), and all DASD is shared with all systems, is there any pro's or con's to having one big HSM plex? Or having multiple HSM plex? Are there any restrictions? Can dataset recalls occur across HSMplex's? </snip> ---------------------------------------------------------------------- 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 This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) named above. If you receive this e-mail in error, please do not read, copy or disseminate it in any manner. If you are not the intended recipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please erase it from your computer system. Your assistance in correcting this error is appreciated. ---------------------------------------------------------------------- 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
