Mongo: avoid duplicate files in gridfs

Question

Is there a way to avoid duplicate files in mongo gridfs? Or should I do this using application code (I use pymongo)

Answer 1

The MD5 sum is already part of the Mongo gridfs metadata, so you can simply set a unique index on this column and the server will refuse to store the file. No need to compare on the client side.

Answer 2

You can use the md5 hash and compare the new hash with the existing one before saving the file.