Recovery Is Hard When the Whole World Is Shut Down
So the derecho came in the dark of night. The first hint was the flicker of lightening off to the northwest. Then a storm more violent than anything Id ever seen before slammed the area. This was worse than the hurricanes Id experienced, including one off the West Coast of Africa that was my previous high point when it came to weather-related anxiety. In 45 minutes, it was gone and so was the power, the Internet service, the phone service and the previously reliable cell tower. But I got the generators started and began bringing up the lab infrastructure. One by one, the switches and servers came alive, the whir of the fans and the flickering of the lights reassuring me that all was well. Then I started up the HP server that handles the Domain Name System (DNS), the Dynamic Host Configuration Protocol (DHCP) and directory services. The low-voltage alarms started going off one by one. I didnt have enough capacity to run the lab, despite my previous tests.Actually, Ill have to buy two more generators for full N+1 capability. But in the meantime, Ill have to also remember that I have to run tests of the entire system more frequently, especially after I add more servers, new switches or network management equipment. I hadnt gotten around to that, and it cost me. But in this case, all of the planning wouldnt have made any difference. As I looked out at the hazy heat that had brought all of this about, the one thing that kept popping into my head (right after the desire for a nice cold beer) was the words of Scottish poet Robert Burns: The best-laid schemes o' mice an' men Gang aft agley, An' lea'e us nought but grief an' pain, For promis'd joy! Thanks for the reminder, old Rabbie. Tonight, Ill have a wee dram of Scotlands best in your memory and to remind me that we cant plan for everything.
So I shut down the servers and the other computers, and finished bringing up the infrastructure. I had capacity for that and everything ran, but I was approaching the total capacity of the generators, and thats never a good thing. But thats when I found that it didnt matter. My lab might be operational, but it couldnt communicate with the outside world because nothing else was operational. Being able to run when the rest of the world isnt really doesnt help muchespecially when you realize that youre going to have to buy another generator and set up load sharing.