There is a reasonably large bank I have worked with in the past that fails over to the DR site and runs production for an extended period (days - perhaps it was two weeks).
I like this approach as it tests infrastructure, communications, and resources in a way that a simple DR Test with no failback will never achieve. I'm reminded of something I heard once along the lines of "We back up to restore, not to just have a copy." Ron Hawkins Director, Ipsicsopt Pty Ltd (ACN: 627 705 971) | m: +61 400029610 | h: +61 387399252 | email: ron.hawk...@ipsicsopt.com -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Steve Beaver Sent: Saturday, 9 February 2019 12:18 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: [IBM-MAIN] Wells Fargo? Well f*&%#d at the moment: Data center up in smoke, bank website, app down . The Register I am wondering if WF can even get the Halon system recharged and how many millions it will cost Sent from my iPhone Sorry for the finger checks On Feb 8, 2019, at 19:08, Savor, Thomas (Alpharetta) <thomas.sa...@fiserv.com> wrote: >> We've been doing DR mirroring for 20 years. It gets tested often. We've moved production twice to another >data center using our procedures. What we've never done is run production in another location >temporarily. 'Temporary' means move it, run it until at least one transaction is committed, then move it >*all* back. That is hugely complex and costly. > >> A lot of management fantasizes about a big A-B switch that we throw one way or the other. So wrong. > > About 5-6 years ago, I was working as a vendor (Daily Support) for Credit Card Software for Halifax/Bank of Scotland. I believe the first time I was given a "heads up" was when we were supporting 12 Million Cardholders. The "Heads up" was that on Friday evening at 6pm Main site was going to shut down and the whole weekend PRODUCTION was going to run on DR site, then 6am Monday Morning, Main site is to come back up and continue as if nothing happened !!! I literally peed in my pants !!! Probably everyone in Atlanta could hear me...NOOOOOOOOO !!! Thinking of all the network signons with Visa and Mastercard...all the credit card Authorizations...there was absolutely zero chance of this working without issues. > > Well, came in Monday morning after receiving no calls over the week-end ....everything was fine. We ran the Batch Monday night...and that would be pulling in transactions from over the week-end from DR site. > NO ISSUES !!! Everything was fine. > > Whoever did this, from a Systems perspective....I tip my hat. I've never seen someone do this with Production, but it worked fine...so what do I know. Never seen anyone else do this in my 42 years of Mainframing either. > > Unfortunately, Halifax/Bank of Scotland is no longer with us. They were absorbed by Lloyds Banking Group. > > > Thanks, > Tom Savor > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
