Ask HN: Do you self-host your database?

Re:Ask HN: Do you self-host your database? by exikyut on Wednesday June 30, 2021 @06:42AM (#27686996)

I must admit I'm very curious as to what real-world thing(s) translate to 35TB of stored data (that presumably isn't large blobs, like video or ML models).

(And oh wow I just realized the billing must be amazing...)

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Re:Ask HN: Do you self-host your database? by cutthegrass2 on Friday July 02, 2021 @10:58AM (#27712354)

Yep, the AWS cost footprint of this system is eye-watering. The compute spend is 2x the RDS spend!

Can't say too much, but it's Financial Services related.

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Re:Ask HN: Do you self-host your database? by exikyut on Friday July 02, 2021 @11:17PM (#27719088)

Ah, a gigantic time series event firehose. (That was what I was curious about.)

I guess this cues the stereotypical "have you looked at kdb+" question, then, which you've probably already fielded :)

(https://kx.com)

IIUC, kdb+ does in fact have a real DB hiding in it, and it's not all just "weird programming language" - but it does seem to require/prefer a reasonable amount of buy-in to the way it does things to be valuable. I guess the lateral question is whether its performance obsession extends to smaller on-disk footprint, and whether the savings would be worth throwing out all the the existing Aurora integration work. (Answer: very probably not.)

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