Clarifying the often-confused terms in data engineering: upstream refers to the processes or data sources that provide data to a particular process, while downstream refers to the processes or systems that consume data from a particular process.
For example, if you have a data pipeline that collects data from multiple sources, cleans and transforms it, and then loads it into a database, the sources of the data are upstream, and the database is downstream.
Upstream processes usually have a significant impact on downstream processes, as the quality and reliability of data they provide affect the quality and reliability of downstream data. Therefore, it is important to ensure that upstream processes are well-designed and well-maintained to prevent downstream issues.
Similarly, downstream processes can also impact upstream processes. For instance, if a downstream process fails to consume data correctly or in a timely manner, it can cause bottlenecks or even data loss upstream. Therefore, both upstream and downstream processes need to be monitored and optimized to ensure the overall success of the data pipeline.
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