Lesson 1 / 25

RDDs and DataFrames

Apply RDDs and DataFrames with clear evidence.

Understand RDDs and DataFrames

For RDDs and DataFrames, begin with the problem it solves. Identify the inputs, constraints, and observable outcome before choosing an implementation.

See the workflow

Use this path while practising RDDs and DataFrames: understand, act, verify, and improve.

Workflow for RDDs and DataFrames.
Figure 1.1 — A repeatable workflow.

A useful comparison

RDDs and DataFrames is like a route plan: it keeps each step connected to a destination.

Check your reasoning.

Quick check: What is the best first step for RDDs and DataFrames?

  • Define the goal and constraints.
  • Copy an unverified example.
  • Skip measurement.
Answer

Define the goal and constraints. — A clear goal and constraints make decisions reviewable.