Nest Engineering Docs
Stream

Data model

Storage, schemas, and data ownership for Stream

Source of truth

  • Stream reads from Cloud Spanner to enrich change stream events.

Primary tables

  • Pipelines
  • Organizations
  • Clinics

Change stream inputs

  • Dataflow forwards Spanner Change Stream events for the Pipelines table.
  • Each change yields TaskInfo for downstream processing when enabled.

Data ownership

  • Stream does not own data; it reads Spanner and emits Cloud Tasks.

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Architecture

System design and data flow for Stream

Local development

Run, debug, and test Stream locally