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Do The Attributes Get Added To Content (actual Data) When Data Is Pulled By Nifi ?

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You can certainly add attributes to your FlowFiles at anytime, that’s the whole point of separating metadata from the actual data. Essentially, one FlowFile represents an object or a message moving through NiFi. Each FlowFile contains a piece of content, which is the actual bytes. You can then extract attributes from the content, and store them in memory. You can then operate against those attributes in memory, without touching your content. By doing so you can save a lot of IO overhead, making the whole flow management process extremely efficient.

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