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New File Copy-Based Initial Sync Overwhelms the Logical Initial Sync in Percona Server for MongoDB
Originally from percona.com/blog/feed/
September 29, 2025 • Roasted by Patricia "Penny Pincher" Goldman Read Original Article

Ah, another dispatch from the front lines of digital disruption. How positively thrilling. I must commend the author's prolific prose on the subject of File Copy-Based Initial Sync. The benchmarks are beautiful, the graphs are certainly… graphic. It's a masterful presentation on how we can make a very specific, technical process infinitesimally faster. My compliments to the chef.

Of course, reading this, my mind doesn’t drift to the milliseconds saved during a data sync; it drifts to the dollars flying out of my budget. I love these "significant improvements," especially when they're nestled inside a conveniently custom, "open-source" solution. It’s a classic play. The first taste is free, but the full meal costs a fortune. This fantastical feature, FCBIS, is a perfect example. It's not a feature; it's the cheese in the mousetrap.

You see, the article presents this as a simple, elegant upgrade. But I’ve been balancing budgets since before your engineers were debugging "Hello, World!" and I know a pricey panacea when I see one. Let's perform a little back-of-the-napkin calculation on the Total Cost of Ownership, shall we? Let me just get my abacus.

The article implies the cost is zero. Adorable. The true cost begins the moment we decide to adopt this "improvement."

So, this "free" feature that offers "significant improvements" has a Year-One TCO of $700,000. And that’s before the recurring support contract, which I’m sure is priced with all the restraint of a sailor on shore leave.

And for what ROI? The article boasts of faster initial syncs.

Those first results already suggested significant improvements compared to the default Logical Initial Sync.

Fantastic. Our initial sync, a process that happens during a catastrophic failure or a major topology change, might now be four hours faster. Let's assume this saves us one engineer's time for half a day, once a year. That’s a tangible savings of… about $400.

So, we’re being asked to spend $700,000 to save $400 a year. The ROI on that is so deeply negative it’s approaching the temperature of deep space. At this burn rate, we'll achieve bankruptcy with large-scale scalability.

This isn't a technical whitepaper. It’s an invoice written in prose. It's a beautifully crafted argument for vendor lock-in, a masterclass in monetizing open-source, and a stunning monument to treating corporate budgets like an all-you-can-eat buffet.

This isn’t a feature; it's an annuity plan for your consulting division. Now if you’ll excuse me, I need to go approve a request for more paper clips. At least I understand their value proposition.