I recall a couple years ago that it was rumored that Apple had bought FDB with the intention of replacing Cassandra (and I think, at the time, Apple had the largest Cassandra cluster ever known).
Combined with other statements in this thread, I think that may be true. I remember reading once that iMessage used to be served by Cassandra, but now its served by FDB.
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Does anyone know if FoundationDB is gaining ground over Cassandra at Apple?
I recall a couple years ago that it was rumored that Apple had bought FDB with the intention of replacing Cassandra (and I think, at the time, Apple had the largest Cassandra cluster ever known).
Combined with other statements in this thread, I think that may be true. I remember reading once that iMessage used to be served by Cassandra, but now its served by FDB.
This is all speculation though.
The FDB Record Layer white paper [0], section 8.1, does open with:
So it seems this is what happened, for CloudKit at least.
[0] https://www.foundationdb.org/files/record-layer-paper.pdf
Apple's Cassandra footprint has grown to over 100 PB (https://twitter.com/jjirsa/status/1071357976454316033)