We have mirrored DASD to our recovery site for 15 years. However, we use XRC/SDM rather than PPRC. Not sure if issues are different, but caveat emptor. In the early years we were afraid to mirror JES2 data sets. Indeed, we actually experienced mirroring errors in the days of ESCON over conventional channel extenders (CMT), and pulled out spool and checkpoint from the mix. This created all kinds of recovery problems to determine where we were in a batch cycle at the time of recovery. We tried various cockamamie schemes to solve these problems to little avail.
We eventually matured to FICON over DWDM. Discovered almost by accident that adding JES2 data sets to the mix had truly negligible effect on XRC overhead. Since then we've mirrored both checkpoint and spool for all recoverable systems. When we IPL in DR, we know exactly where we were at the point of last update. Given the performance of modern technology, I can't imagine trying to recover without JES. Hard to believe that PPRC would alter this opinion. . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 626-302-7535 Office 323-715-0595 Mobile [email protected] From: "Storr, Lon A CTR USARMY HRC (US)" <[email protected]> To: [email protected], Date: 09/03/2014 09:16 AM Subject: JES2 and IBM Global Mirror (UNCLASSIFIED) Sent by: IBM Mainframe Discussion List <[email protected]> Classification: UNCLASSIFIED Caveats: NONE Hello List, I'm interested in experiences regarding the inclusion of JES2 (checkpoint and spool) volumes in IBM Global Mirror (i.e. PPRC). Googling yields pros and cons (the most troubling of which is mentioned in a presentation given by Tom Wasik of IBM at Share 118 on 3/12/12). Any input would be much appreciated. Thanks, Alan ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
