Large files and chunking

Reading a file too big to hold in a payload, and the memory limit you will meet before you expect to. The naive read loads the whole file into the message. That works comfortably for the sample the partner sent and fails on the real file — and the failure is not gradual: it works, it works, it works, then it does not. SEGMENTED READING processes the file in chunks rather than holding it whole: a batch of records at a time, mapped and sent, then the next. The memory footprint is a batch rather than a file, which means the design scales with the batch size you chose rather than with what the partner sends. THE LIMIT ARRIVES EARLIER THAN PEOPLE EXPECT, because the payload is not just the file — it is the file, plus the mapped structure, plus whatever earlier steps added. A file that looks modest…

In this module: Module 7 · Scheduled integrations and file handling

1. 1Scheduling an integration
2. 2Parameters and run state
3. 3Reading files: patterns and directories
4. 4The staging problem
5. 5Large files and chunking
6. 6Writing files a partner can read
7. 7Archiving and idempotent file processing
8. 8Catching the file that never arrived
9. 9What breaks: four file failures
10. 10Lab briefing · A nightly file, done properly