When we started mirroring for DR around 2000, we opted for XCF (now something-something-for-z/OS) over PPRC because of possible I/O impact. XRC was asynchronous, so mirroring might get behind but not impact production.
. . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office ⇐=== NEW [email protected] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Tommy Tsui Sent: Wednesday, February 14, 2018 1:15 PM To: [email protected] Subject: (External):DASD problem > > Hi all, Our shop found the most job elapse time prolong due to pprc synchronization versus without pprc mode. It's almost 4 times faster if without pprc synchronization. Is there any parameters we need to tune on z/os or disk subsystem side? We found the % disk util in RMF report over 80, Any help will be appreciated. Many thanks ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
