kdb/q, or many other mature data platforms. 250M records isn't big for a lot of data platforms. I've seen plenty of solutions in traditional RDBMSs that would

kdb/q, or many other mature data platforms. 250M records isn't big for a lot of data platforms. I've seen plenty of solutions in traditional RDBMSs that would easily scale an order of magnitude larger than this, if not several. Moving into anything analytically focused, like an OLAP engine, or just a columnstore in an RDBMS easily gives you another order of magnitude or few.