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Flume >> mail # user >> Data Lineage

Hello All,


In my company we are worried about data lineage. Big files can be split into
smaller files (block size) inside HDFS, and smaller files can be aggregated
into larger files. We want to have some kind of control regarding data
lineage and the ability to map source files to files in HDFS. Using
interceptors we can add various keys like timestamp, static, file header


After a file has been processed and inserted into HDFS, do those keys still
exist and viewable if I choose to cat the file in HADOOP? (I did cat the
files and didn't see any of the keys) Or the keys only exist during the
process and are not saved into the file.


Alternatively is it possible to append those keys into the file using
Flume's built in component?


I appreciate the help,