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by misframer 2715 days ago
I wrote a blog post on how to implement secondary indexes using an ordered key-value store a couple of years ago: https://misfra.me/2017/01/18/how-to-implement-secondary-inde...

It would work with FoundationDB, RocksDB, etc. I actually learned these techniques when I interned at FoundationDB but have used them the most with other K-V systems.