It's been a long time since there was a mainframe in our machine room, but up until recently there were still a few relics of the original installation.
The room that was slightly larger than the size of a basketball court has since been partitioned into a much smaller space. Even in the much smaller space there is a lot of available room, partly due to more powerful computing having a much smaller footprint than previously, and also because we make great use of virtualisation.
Now in rack space no larger than a couple of washing machines we run over 1200 servers.
When the partitioning work took place, in the early 2000's, I liberated this piece of monitoring kit to use as a desk ornament. It's a Honeywell circular chart used to plot temperature over the time period of a week. There were probably similar charts to record humidity. On the panel I removed the chart from there were large indicator lamps to display alert states, and there were outsized and clunky switches to set different modes, all very 1960's in appearance, a classic period.
This chart doesn't appear to have ever been used, although it does have a spreading ink mark where the pen was left in stationary contact with the paper, like a failed chromatography experiment.
For official/internal use only:
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