Distributed
← Data modeling & storage

Lesson 06.5

Time-series, graph & columnar stores

Specialized stores arrange data for particular work: time-series databases for timestamped windows, graph databases for relationship traversals, and columnar databases for large analytic scans.

Update one complete transactional record

Ava changes one cookie order while a payment is being checked. The computer needs the whole order together.

In this lesson you'll

  1. 1Follow one run and learn how to read the picture
  2. 2Predict what changes before revealing the result
  3. 3Compare the choices and help Ava get one committed order without too much waiting