THE ‘ONE WAY STREET‘ PROBLEM

The ‘One Way Street‘ Problem

The ‘One Way Street‘ Problem arises as a result of any algorithm that transforms data in such a way that the original values cannot be retrieved.

It might appear counter-intuitive that it is possible to so alter our data as we migrate it that it is impossible to go back the other way and recreate the original values. But it is. Anyone familiar with one-way encryption will be aware of how this can happen. But let us go through a worked example first.

Let us take the Equipment entity from our worked example as a demonstration. The new system allows us to create an Equipment hierarchy of ...

Get Practical Data Migration now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.