One company had data centers in Miami and New Orleans. Miami shut down for a hurricane, and wasn't back up before Katrina hit New Orleans.
On Thu, Jan 11, 2018 at 6:44 AM, Timothy Sipples <sipp...@sg.ibm.com> wrote: > J.O.Skip Robinson wrote: >>Losing XCF connection to a sysplex member would be a whole >>nother level of impact that I've never been willing to sign >>up for even though our network today is far more reliable >>than it was 20 years ago. > > Isn't losing XCF connectivity something worth planning for? It's rare, but > I suppose it could happen no matter what the distance. > > Isn't it always best to weigh various risks, sometimes competing ones, and > try to get as much overall risk reduction as you can? You're in southern > California, and there are earthquakes and fires there, I've noticed. (Maybe > plagues of locusts next? :-)) One would think there's some extra California > value in awarding an extra point or two to distance there. Japan's 2011 > TÅhoku earthquake and tsunami triggered some business continuity rethinking > there, and it has altered some decisions about data center locations, > distances, and deployment patterns. The risk profile can change. And, as > you mentioned, networks have improved a lot in 20 years while the risks > California faces seem to be somewhat different. It's always worth > revisiting past risk calculations when there's some material change in the > parameters -- "marking to market." > > If losing XCF connectivity would be that devastating, why have XCF links > (and a Parallel Sysplex) at all? It is technically possible to eliminate > those links. You just might not like the alternative. :-) > > You're also allowed to do "some of both." You can stretch a Parallel > Sysplex and run certain workloads across the stretch, while at the same > time you can have a non-stretched Parallel Sysplex and run other workloads > non-stretched. That sort of deployment configuration is technically > possible, and conceptually it's not a huge leap from the classic remote > tape library deployments. > > -------------------------------------------------------------------------------------------------------- > Timothy Sipples > IT Architect Executive, Industry Solutions, IBM Z and LinuxONE, AP/GCG/MEA > E-Mail: sipp...@sg.ibm.com > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
