Firestore pricing vs Cloud Bigtable?

[Kevin Burton]

I'm curious if Google (or anyone else) has any visibility on comparing pricing of Firestore vs Cloud Bigtable?

Firestore is priced per IOP (read / write) whereas Cloud Bigtable is priced per node /SSD.

I'm thinking of doing most of my real-time and user facing data on Firestore and then moving some of this into Cloud Bigtable for more ETL-like operations.

Pricing is the big motivator here as a lot of the algorithms would be expensive to run on Firestore but should be much more affordable on Bigtable.

Firestore is REALLY good for user facing event-updated data but I want to have some ETL jobs that load data back and forth.

Kevin

[Sam Stern]

Hi Kevin,

BigTable is a fantastic product and using it alongside Firestore is definitely a powerful combination.  I'd suggest using the GCP pricing calculator to get a better sense of BigTable pricing:
https://cloud.google.com/products/calculator/#tab=bigtable

It's very hard to compare BigTable and Firestore on price without knowing a lot about your situation and scale.  As you know, Firestore has a minimum cost of $0.  BigTable requires a minimum of three nodes, which means you have a much higher cost baseline if your utilization is low.  However as your QPS grows, it's very possible that the average cost-per-operation for BigTable could be lower than Firestore.  It all depends on the shape of your workload.

And as you said, Firestore is more than a database here because it delivers your data directly to the client.  With BigTable (or pretty much any database) you'd have to build the client access layer yourself.

- Sam

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