DataDiffer will compare a user-defined percentage of random documents between two MongoDB/DocumentDB servers for a single collection in each.

1. Install pymongo, deepdiff, and tqdm software packages by running the following commands in the command line:

    pip install pymongo
    pip install deepdiff
    pip install tqdm

2. Clone the repo to your machine where you want to run DataDiffer.

3. CD into DataDiffer

1. Assuming you have the prerequisites above met, create an envrionment file(s) as needed based on your migration needs. The environment file should set environment variables and look something like this with each variable filled out for your use case:

    export SOURCE_URI=""
    export SOURCE_DB=""
    export SOURCE_COLL=""
    export TARGET_URI=""
    export TARGET_DB=""
    export TARGET_COLL=""

2. Source the environment file you built in the command line with a command such as the following:

    source <environment-file-name-here>.sh

3. Run the data-differ.py file in the command line with the proper arguments, such as the following:

     python data-differ.py --source-uri $SOURCE_URI --target-uri $TARGET_URI --source-namespace "$SOURCE_DB.$SOURCE_COLL" --target-namespace "$TARGET_DB.$TARGET_COLL" --percent 100

Note: You can adjust the percent value as you wish in the command above.

4. See the ouput in the command line!