[AtlasBarfed]

"MongoDB’s default level of write concern was (and remains) acknowledgement by a single node, which means MongoDB may lose data by default."

Cassandra doesn't do that, consistency level is fundamental to the documentation and user guide. That is AWFUL.

"Curiously, MongoDB omitted any mention of these findings in their MongoDB and Jepsen page. Instead, that page discusses only passing results, makes no mention of read or write concern, buries the actual report in a footnote, and goes on to claim:

    MongoDB offers among the strongest data consistency, correctness, and safety guarantees of any database available today.

"

That is fraud. That is clownshow. Enjoy your increasing revenue.

[threeseed]

The default write concern for the last 2 years has been majority.

And single node is a perfectly fine default for most use cases.

After all Cassandra's default consistency level is 1.

[dorlaor]

Most users of ScyllaDB/Cassandra use quorum or local_quorum

[threeseed]

And most users of MongoDB use majority write concern.

Hence my point there is no difference in defaults between MongoDB and Cassandra.