'Twas the night before Christmas, when all through the mesh,
Not a packet was dropped, not a single refresh;
The exhaust air moved up the chimneys with care,
In hopes that containment would rid the hot air.
The technicians and crew were snug in their beds;
Assured that DCIM would alert any dreads,
And the office in shutdown and the NOC at rest
Not a worry of disaster, no sign of distress.
When one of the CRACs just simply went dead,
Transmitted by sensor straight to my bed.
An alarm on my phone and an email on tablet
Made me spring from my sleep as fast as a rabbit.
Brushing my car of the new fallen snow,
I jumped right in and was ready to go.
When I entered the room and turned on the light
I knew right away the air was alright.
None of the cold aisles were at all too warm,
For my network equipment to safely perform.
But I quick got to work and checked far and wide,
And shouted out options with each that I tried.
"Now fan, now fluids, now coil and sensor!
On filter, on power, and even condenser!"
Whatever the cause, there is no one to blame
The backup systems worked well just the same.
Proud that resilience was planned in detail,
To prevent overheating when one CRAC would fail.
So no worries tonight, tomorrow or next,
Cause' of redundant design, all performs as expects.
With the equipment safe and my mind at ease,
I gave a quick nod and locked up with the keys.
With a note to self to service the CRAC,
I started for home, without looking back.
But I had to Tweet,er I drove out of sight,
"Happy Holistic Design to all, and to all a good night!"
Belden Data Center Bloggers