3 years ago

Category: Business, Database, Data, github

Academic data warehouse design recommends keeping everything in a normalized form, with links between. In other words, the storage is explicitly built to safely update the data.

It analyzes the structure of fields, makes some assumptions about the types of data in them, skips through the default settings and writes down.

For this, there is a special command to transfer data from one index to another, the so-called _reindex API.

In general, data migration should take place in 3 stages: add a new field, release a service with it, remove the old field.