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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I may have jumped the gun for the list of programming languages, because I found the list right before you sent this. I am currently on the github readme for node. https://github.com/Venemo/node-lmdb. I really appreciate it. Thank you for all the other knowledge too. Hopefully I can figure this out and utilize it.
Poking around at your post/comment history, maybe this will be relevant: here's a scraper that downloads option chains and sticks them into PostgreSQL. Each day, 600 MB worth of HTML data are downloaded, parsed, and stuck into PostgreSQL. It handles this just fine.