amazon web services - AWS feed processing - How to make sure that processing is done sequentially? -


we processing xml/json feeds.
need process files sequentially.
want store them database.

our workflow:

  1. download feed (xml/json file)
  2. process feed using step function
  3. finally, step function stores data in database

the downloaded feed 1 newest data, want process them sequentially, since need difference between each feed.
files processed slower/faster others, due difference in size.

now because file sizes different, problem processing step functions overlap eachother , wrong data goes database.

is using step functions right way go this, or there better alternative our workflow overlooking?
how make sure process feeds sequentially?


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