What effect would a "Quiesce" have? This is a clean, safe way to end all I/O but what incomplete transactions will be lost?
Tom On Tue, 2005-12-06 at 08:13 -0800, Skip Robinson wrote: > I think the most important action--but not necessarily the first--is V XCF > OFF. That should stop ongoing I/O in as synchronized a manner as possible > across all applications. > > $PJES2 will most certainly never complete, but it will prevent any new > tasks from starting. I would NOT do a TERM because you lose all control at > that point. > > As for CICS and DB2, we've had system crashes that they recover from quite > robustly--as long as CF structures remain intact. You didn't mention data > sharing or the location of CFs. Losing a z/OS system AND its supporting CF > is a recipe for extended recovery. > > The key I believe is to issue V XCF OFF before any devices start to go > casters up. So I wouldn't take chances. Do it NO MORE THAN 50% into your > presumed survival window. > > . > . > . > JO.Skip Robinson > Southern California Edison Company > SHARE MVS Program Co-Manager > 626-302-7535 Office > 323-715-0595 Mobile > [EMAIL PROTECTED] > > IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 12/06/2005 > 06:39:31 AM: > > > Let's assume the following scenario: > > "Disastrous" power outage occured, no alternate power source is > > available, only UPS battery. Time for battery discharge is approx. 20-30 > > minutes. > > DASD is mirrored to remote site, system z/OS, DB2, CICS. > > > > The goal is to keep *remote* copy as consistent as possible. Additional > > goal is to make system start possibly quick. > > > > > > What operational scenario would be best in this case: > > 1. Do nothing. At the remote site DB2 will backout all uncommited > > transactions. > > > > 2. Try to issue > > F CICSname,CEMT P SHUT > > -DB2 STOP DB2 > > $PJES2 > > Probably the remaining time is not enough to finish the commands above. > > > > 3. Try "radical" commands like > > F CICSname,CEMT P SHUT I > > -DB2 STOP DB2,FORCE > > $PJES2,TERM > > > > 4. Other (???) > > ---------------------------------------------------------------------- > 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 > > ---------------------------------------------------------------------- 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
