A data engineer wants to ingest data from a cloud-storage source that contains data from the past decade. What must be done to ingest only data from the past year?

Ingesting data from a cloud-storage source that dates back a decade while only wanting to capture the last year’s worth requires a strategic approach. The most effective method is to provide a start time for the data ingestion process. By specifying a start time, the system can filter and only ingest data that has been created or modified from that point onwards.

Enabling backfill allows for filling in any gaps that may exist within the specified time frame. This means that if there are any data points missing from the last year, the ingestion process can still capture those missed data items, thereby ensuring a complete dataset for the past year.

In contrast, merely renaming the cloud-storage file or changing its status to read-only does not impact the data ingestion parameters and does not filter data based on time criteria. Deleting prior data is also an extreme approach and not necessary if the right parameters are set during the ingestion process. Thus, providing a start time and enabling backfill is the appropriate method for ensuring that only the desired year of data is ingested.