Night Owls

Happy New Year everyone! Big Ben chimed fifteen minutes ago, the Queen opened the Millennium Dome, and the lights are still blazing right across Yorkshire. Our computer screens didn't even flicker when the clock turned 2000.

Kookaburra is spot on mate, you are proper hunting for gremlins now! If the entire country hasn't tripped an interlock by quarter past midnight, I think we can safely say the world isn't grinding to a halt. Half the standby team here has put their feet up to watch the fireworks on the telly, and the emergency phone line hasn't rung once all evening. Total damp squib!

TheyKnow wrote:

Pumps and pressure valves are driven by PLCs and automated loop controllers. Those devices poll sensors on set time intervals, and if an embedded chip calculates a negative time delta between cycles, the logic trips a safety interlock.

Happy New Year lads. Board maintenance and restarts all done without a hiccup, and the ISP pipes here are completely steady.

Sure look, PLC cycle deltas compare clock ticks, not Gregorian years. The engineering held up grand because people actually did the work. Time to let it go, TheyKnow.

Glad to hear your screens are bright over there, PintOfMild... but celebrating fifteen minutes after midnight is calling the game in the first inning. When secondary log buffers fill up and those unpatched morning batch jobs kick off, that is when the real strain begins. I am keeping my headsets on right here.

TheyKnow wrote:

When secondary log buffers fill up and those unpatched morning batch jobs kick off, that is when the real strain begins.

Happy New Year to Kev and PintOfMild across the pond. Good to see the British systems greeting the hour without a hitch.

Now, about those batch runs. Many of the major institutions ran simulated roll-forward batches on isolated hardware months ago. If a secondary log buffer or a date routine was prone to choking on a four-digit year, it was caught and remediated during the test cycles, just as Kev pointed out with the PLC logic.

We still have four hours to go here in Toronto, but our command screens are entirely quiet. The real-world work was sound, and the results speak for themselves.

it is past lunch time on saturday here in melbourne and literally nothing has broken. people are out at the beach, cash machines are working, and the power grid didn't even notice. hearing punchcard and kev explain how the tests and clock cycles actually worked makes so much sense compared to all the scary theories. the UK has been in 2000 for over an hour now, and even the queen was singing at the dome without the power cutting out! keeping headsets on to wait for buffers to fill just sounds exhausting. the engineers genuinely fixed it, we can all enjoy the new millennium

Punchcard wrote:

Many of the major institutions ran simulated roll-forward batches on isolated hardware months ago.

A simulated test run on clean, isolated hardware is fine and well on paper, Punchcard... but that is a far cry from live, interconnected production environments running in the wild. You can patch the mainframes in Toronto, but when third-party data feeds start passing bad syntax into those systems tomorrow morning, those test routines won't mean much.

Over on the other side of the world, folks might be out on the beach, but Saturday morning traffic is always light. The true strain on these networks doesn't happen when half the staff is off for a long weekend. We still have the entire Western Hemisphere to go, and I am not taking these headsets off just yet.

Blimey, you are determined to go down with the ship, mate! If interconnected systems were going to throw a fit, half of Europe and Asia would be in the dark by now. We've got about thirty-five minutes left on our shift here and the supervisor has already started packing up his bag. The phone hasn't made a peep. Not a single customer panicking, no rogue data feeds melting our servers, nothing. Just a very quiet room full of empty sweet wrappers! Punchcard and Kev know their stuff, the clever lads in IT sorted it out months ago.

PintOfMild, enjoy heading home shortly. Still an hour left on my own shift here in Dublin, but the router banks are ticking along nicely.

Keep it civil lads, no need to get personal over the headsets. Let the lad listen to static if he wants. -- Kev (mod)

Static carries plenty of information if you know what frequencies to tune, my friend... but nobody is trying to start an argument here. I just look at how industrial infrastructure actually operates day to day. It is easy to pack up a bag when the office phones stay quiet on a holiday night, PintOfMild, but the Western Hemisphere has not even crossed the line yet. North America is the biggest concentration of automated switching, legacy databases, and tied pipelines in the world, and our clocks are still counting down.

Boston Children's Hospital was finding missing patches on critical cardiac servers just this past week, so anyone acting like every loose end was neatly tied up months ago is ignoring reality. When systems stay idle over a holiday, they aren't passing real transactional loads. We will see what happens when the morning processing starts and genuine production data begins crossing between mismatched third-party interfaces. It costs nothing to stay watchful and keep an eye on the gauges until the whole circuit is verified, folks. I will be right here at the bench.

Those third-party feeds do not magically alter their record formats just because the year rolled over, my friend. Input validation routines either accept the fixed layout or reject the record to an error file; they do not bring down an entire enterprise. We are watching the wire queues right now, and everything is quite calm.

Punchcard has the right of it. Two hours past midnight here, queues are clear, and I am heading home.

if feeding bad syntax just kicks out an error file like punchcard says, there really is nothing to dread.

Punchcard wrote:

Input validation routines either accept the fixed layout or reject the record to an error file; they do not bring down an entire enterprise.

Dumping bad records to an error file is standard practice, sure... but those files don't just vanish into thin air, folks. When thousands of automated entries get rejected out of the queue at once, the downstream systems that depend on them don't receive their updates. The machine might not crash, but the actual work stops getting done until somebody sorts the mess out by hand. Having empty wire queues in the middle of the night just means the lines are idling. We still have a couple hours before the clocks strike twelve here in the Rockies, and I intend to stay right at this bench until the wave passes through.

Midnight just passed here in Toronto. The streetlamps outside are on, and our screens are as quiet as church.

Glad your lights are on, Punchcard, but streetlamps don't process live commercial loads... we still have forty-five minutes out here.