Reference documentation and code samples for the Dataflow V1beta3 API module Google::Cloud::Dataflow::V1beta3::StreamingMode.
Specifies the Streaming Engine message processing guarantees. Reduces cost and latency but might result in duplicate messages written to storage. Designed to run simple mapping streaming ETL jobs at the lowest cost. For example, Change Data Capture (CDC) to BigQuery is a canonical use case. For more information, see Set the pipeline streaming mode.
Constants
STREAMING_MODE_UNSPECIFIED
value: 0 Run in the default mode.
STREAMING_MODE_EXACTLY_ONCE
value: 1 In this mode, message deduplication is performed against persistent state to make sure each message is processed and committed to storage exactly once.
STREAMING_MODE_AT_LEAST_ONCE
value: 2 Message deduplication is not performed. Messages might be processed multiple times, and the results are applied multiple times. Note: Setting this value also enables Streaming Engine and Streaming Engine resource-based billing.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-10-10 UTC."],[],[]]
