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filemd5

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  • Definition
  • Compatibility
  • Syntax

Definition

filemd5

The filemd5 command returns the md5 hash for a single file stored using the GridFS specification. Client libraries use this command to verify that files are correctly written to MongoDB. The command takes the files_id of the file in question and the name of the GridFS root collection as arguments.

Compatibility

This command is available in deployments hosted in the following environments:

  • MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud

Note

This command is supported in all MongoDB Atlas clusters. For information on Atlas support for all commands, see Unsupported Commands.

Syntax

The command has the following syntax:

db.runCommand(
   {
     filemd5: ObjectId("4f1f10e37671b50e4ecd2776"),
     root: "fs"
   }
)

MongoDB computes the filemd5 using all data in the GridFS file object pulled sequentially from each chunk in the chunks collection.

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