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Home/Questions/Cloud/Tools/Explain GetMetadata, ForEach, and Copy Data in Azure Data Factory.

Explain GetMetadata, ForEach, and Copy Data in Azure Data Factory.

Cloud/Toolseasy0.2 min read

Reviewed by Aditya Kumar · Last reviewed 2026-03-24

Architectural logic: GetMetadata lists files/folders; ForEach iterates; Copy Data moves data. Flow: GetMetadata path → childItems → ForEach items → Copy Data per item. Why: Dynamic file iteration; per-file control. Scalability: ForEach batchCount for parallelism; Copy...

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Asked at 1 company
Category
179
questions in Cloud/Tools
Difficulty Split
104E|27M|48H
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1,863
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Expert Answer
48 words

Architectural logic: GetMetadata lists files/folders; ForEach iterates; Copy Data moves data. Flow: GetMetadata path → childItems → ForEach items → Copy Data per item. Why: Dynamic file iteration; per-file control. Scalability: ForEach batchCount for parallelism; Copy parallelCopies. Best practice: GetMetadata + ForEach for dynamic; handle empty; use @item().Name.

⚡
Pro Tip

Red Flag: Sequential ForEach when parallelism is possible. Pro-Move: 'We use batchCount 10 on ForEach; GetMetadata filters by date—process 500 files in 5 min vs 30 min sequential.'

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