Help Center> FunctionGraph> User Guide (ME-Abu Dhabi Region)> FAQs> Trigger Management FAQs> What Do LATEST and TRIM_HORIZON Mean in DIS Trigger Configuration?

Updated on 2023-05-09 GMT+08:00

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What Do LATEST and TRIM_HORIZON Mean in DIS Trigger Configuration?

Cursors LATEST and TRIM_HORIZON specify the start points for reading data in Data Ingestion Service (DIS) streams.

TRIM_HORIZON: Data is read from the earliest valid record stored in the partition.
For example, a tenant used a DIS stream to upload three pieces of data A1, A2, and A3. Assuming that A1 expires but A2 and A3 are still valid after a period of time, if the tenant specifies TRIM_HORIZON for downloading data, only A2 and A3 can be downloaded.
LATEST: Data is read from the latest record in the partition. This option ensures that the most recent data in the partition is read.

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