Just be glad you don't have to deal with "brown outs." A common occurrence in the Philippines. There are times when the power company simply turns off the supply to rural districts when they have trouble meeting peak demands.
> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of > Kelman, Tom > Sent: Thursday, June 24, 2010 7:37 AM > To: [email protected] > Subject: Re: [IBM-MAIN] Geographic separation of primary and backup/DR sites > > I would say that at a minimum you would want to be on separate power > substations. Your power company should be able to provide this service, > although they might charge extra for it. Most large IT organizations > feel it's worth it. > > However, because of the interconnectivity in the U.S. and Canadian power > grids, as well as those in other countries, there is always the > possibility of a power outage you can't prepare for. I'm sure many will > remember the massive power outage in 2003 where a 3,500 MW surge went > through the power grid(s) in the northeast taking out power to an > estimated 45 million people in eight states and 10 million people in > Ontario, Canada. This included large cities such as New York, > Baltimore, Buffalo, and Toronto. When this occurred Europe gloated that > it had a much better system and they would never have a similar > blackout. Six weeks after this there was a blackout that affected just > as many people in all of Italy and parts of Switzerland. A power outage > occurred in Southern Brazil in 1999 and affected approximately 90 > million people. One in 2005 in Java-Bali affected 100 million people. > > With massive outages like this both your main site and your DR site > would probably be affected unless they are on opposite sides of the > world, or the DR site is on the moon. > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Jeffrey Deaver > Sent: Thursday, June 24, 2010 7:59 AM > To: [email protected] > Subject: Re: Geographic separation of primary and backup/DR sites > > >Also remember if DR is fairly close to base make sure they are on > >separate power grids or at least have generators. > > That is such a nebulous term, "power grid". Anyone have more definite > references for what that should mean? Does it just mean separate power > substations? That the ultimate feed comes from completely different > generating plants? Of different types? (Nuke vs Coal?) And how exactly > do > you find out information like that? And can't the power down the last > mile > be coming from one place today and other tomorrow depending on how the > power company manages it? > > While I'm sure this is not comprehensive, this Blackout Tracker website > gives some interesting insight into power outages... > http://powerquality.eaton.com/blackouttracker/default.asp > > Jeffrey Deaver, Engineer > Systems Engineering > [email protected] > 651-665-4231(v) > IS - "Creating competitive advantage with technology. Providing service > that excels." > OSS - " Where Innovation Happens" > > ---------------------------------------------------------------------- > 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 > > > **************************************************************************** * > If you wish to communicate securely with Commerce Bank and its > affiliates, you must log into your account under Online Services at > http://www.commercebank.com or use the Commerce Bank Secure > Email Message Center at https://securemail.commercebank.com > > NOTICE: This electronic mail message and any attached files are > confidential. The information is exclusively for the use of the > individual or entity intended as the recipient. If you are not > the intended recipient, any use, copying, printing, reviewing, > retention, disclosure, distribution or forwarding of the message > or any attached file is not authorized and is strictly prohibited. > If you have received this electronic mail message in error, please > advise the sender by reply electronic mail immediately and > permanently delete the original transmission, any attachments > and any copies of this message from your computer system. > **************************************************************************** * > > ---------------------------------------------------------------------- > 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
