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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Dear Joshua<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Very good questions you ask… and a step away from the normal networking posts, that being said I love datacentre infrastructure just as much as I love networks ;)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>For me I did the exact math’s you talked about, cost of power over a year paying a fixed price, versus the cost of power over a year at a reduced cost knowing you might need to turn off mains power in periods of high demand or pay the penalty of additional costs.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Bevan makes a great point however knowing when the network is “stressed out” gives you time to act and respond and swap power in a controlled manner.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Whilst datacentres are designed to react to the sudden loss of power and not be service affecting a smooth transition is always preferred.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>This is no different to say looking at the weather outside knowing there will be lots of wind and it “might” make sense to predict mains failure and run on diesel generated power, giving you control of the situation… The day and life of running a datacentre !<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Because our power requirements are only 1MVA compared to Bevan’s huge 22MVA our electrical supply is considerably smaller, thus the difference (saving) between a fixed cost vs the reduced cost to shutdown mains supply at periods of high demand is also minimized. Obviously the greater your requirements the greater the saving so the larger you are the more it makes sense.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Like anything one could say there is a risk in swapping from mains to internal generator power, but like everything there is always a risk associated with change either in a controlled or none controlled environment.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>As for cost, 1MVA requires around 180 L of fuel per hour (Give or take different engine efficiencies)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>So based on today’s fuel cost which is 161.84 cents per L you’re looking at about $290.00 per hour per 1MVA<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Hope this answers your questions<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Kindest Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Verdana","sans-serif";color:black'>James Braunegg<br></span></b><b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>P:</span></b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> 1300 769 972 | <b>M:</b> 0488 997 207 | <b>D:</b> (03) 9751 7616</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>E:</span></b><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><a href="mailto:james.braunegg@micron21.com"><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>james.braunegg@micron21.com</span></a></span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'> | <b>ABN:</b> 12 109 977 666 <br><b>W:</b> <a href="http://www.micron21.com/ddos-protection"><span style='color:black'>www.micron21.com/ddos-protection</span></a> <b>T:</b> @micron21<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><br><img border=0 width=250 height=39 id="Picture_x0020_1" src="cid:image001.jpg@01CF124C.EE42E690" alt="Description: Description: Description: Description: M21.jpg"><br></span><span lang=EN-AU style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>This message is intended for the addressee named above. It may contain privileged or confidential information. If you are not the intended recipient of this message you must not use, copy, distribute or disclose it to anyone other than the addressee. If you have received this message in error please return the message to the sender by replying to it and then delete the message from your computer.</span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Joshua D'Alton [mailto:joshua@railgun.com.au] <br><b>Sent:</b> Wednesday, January 15, 2014 11:40 PM<br><b>To:</b> Bevan Slattery<br><b>Cc:</b> James Braunegg; AusNOG@lists.ausnog.net<br><b>Subject:</b> Re: [AusNOG] DC undervoltage issues<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Cheers James and Bevan.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>And I assume the "super high price" for electricity is substantially higher than the cost of running the generators in that period (ie capex/depreciation + cost of diesel < cost of power)? Can you comment Bevan on if its close, or far away from utility power costs in general? as in its obviously more expensive to power the DC via diesel long term (either due to raw fuel cost or with generator costs included), but how close is it? and further, how much of a bet/risk is it to purchase the cheaper power with these restrictions (having to go off-grid or else pay a premium)? <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I'm guessing its probably a case of using historical data and just match things up to work out how many days per year on average, the cost of diesel and generators during that period, and making sure its less than the X% more per year paid for utility power with no usage restrictions, ?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Might be another thread for this, or even off-list, but I'd imagine listers would find this interesting or useful.<o:p></o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Jan 15, 2014 at 11:30 PM, Bevan Slattery <<a href="mailto:bevan@slattery.net.au" target="_blank">bevan@slattery.net.au</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From: </span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Joshua D'Alton <<a href="mailto:joshua@railgun.com.au" target="_blank">joshua@railgun.com.au</a>><o:p></o:p></span></p></div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Date: </span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Wednesday, 15 January 2014 10:17 pm<br><b>To: </b>James Braunegg <<a href="mailto:james.braunegg@micron21.com" target="_blank">james.braunegg@micron21.com</a>><br><b>Cc: </b>"<a href="mailto:ausnog@lists.ausnog.net" target="_blank">ausnog@lists.ausnog.net</a>" <<a href="mailto:ausnog@lists.ausnog.net" target="_blank">ausnog@lists.ausnog.net</a>><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><br><b>Subject: </b>Re: [AusNOG] DC undervoltage issues<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div><div><div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>> Does the energy provider call up the DC and say oh hey, as per agreement go onto generators for X hours thanks, your next bill will be credited ABC ?).<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>Goes like this:<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>Option 1: Energy Provider rings and says due to network instability can we ask you to shed xx% of load over this period of time<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>Option 2: Major DC rings energy provider and says we are seeing network instability – we are considering moving over to internal power. What is your advice/recommendation (graceful exit from grid)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>Option 3: Power is outside of tolerance on one or more feeds and the DRUPS engines kicks in – no phone call required, but courtesy call is usually given post fact (all in LV side and the DC’s control)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>Option 4: Loss of HV power to site will require call to provider for approval before bringing back on grid (safety and capacity confirmation)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>The rest of the “commerciality” is confidential.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#888888'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#888888'>[b]<o:p></o:p></span></p></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>