6.40Scatter-Gather and side effects

Be careful using Scatter-Gather for multiple writes:

              ┌→ Salesforce create
Request → SG ─┼→ Billing create
              └→ ERP create

What if:

Salesforce success
Billing success
ERP failure

You now have partial state across systems.

Scatter-Gather doesn't magically give you:

distributed ACID transaction

You may need:

compensation
retry
reconciliation
saga-style design

This is an important senior-level integration concept.