11.1The simplest mental model

Think:

Mule Batch
==========
How Mule processes a large collection reliably

Salesforce Bulk API
===================
How Salesforce accepts/processes large record volumes efficiently

They can be used together.

Example:

CSV with 500,000 customers
        ↓
Mule Batch Job
        ↓
transform / validate / partition
        ↓
Salesforce Bulk API v2
        ↓
Salesforce

Mule batch processing is explicitly designed for reliable asynchronous processing of large datasets and can persist work so batch executions can survive crashes/redeployments.