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Run MongoDB compatible apps on Firestore (Zero code changes)

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Run MongoDB compatible apps on Firestore (Zero code changes)

Firestore with MongoDB compatibility overview → https://goo.gle/4rHxW5L

Did you know you can point a MongoDB application at Firestore just by changing a connection string? Patrick Costello, Firestore Engineering Lead, joins Martin Omander to show exactly how the new interface works under the hood, without changing any code.

Watch along as the duo switch an application from a MongoDB compatible database to Firestore, and then we put it to the test. Patrick ramps the load up to 40,000 orders per second, showing how Firestore handles the massive influx of writes while Cloud Run automatically scales the application instances to match.

Key takeaways:
1️⃣ Flexibility: Easier switching between MongoDB compatible databases and Firestore (in both directions) using drivers and tools you already know.
2️⃣ True serverless: No sharding or provisioning capacity ahead of time. It scales to zero and handles spikes automatically.
3️⃣ Unified Ops: Manage your database, IAM, and networking in a "single pane of glass" alongside the rest of the Google Cloud resources.

Chapters:
0:00 – Intro
1:01 – What is Firestore?
1:40 – Is it realistic to switch databases?
2:10 – Demo
3:18 – Why use Firestore?
4:14 – Scalability
6:26 – Database migration
7:15 – Takeaways
7:49 – Wrap up

Watch more Serverless Expeditions → https://goo.gle/ServerlessExpeditions
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#GoogleCloud

Speakers: Martin Omander, Patrick Costello
Products Mentioned: MongoDB, Firestore, Cloud Run

Date: December 11, 2025