"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.

Although it was some time ago and I may be misremembering, I seem to recall reading the Jepsen article on RedPanda and thinking that it (and Postgresql) were among the better reports.

Certainly, not all Jepsen reports are all that bad, and tbh I'm at leaast as interested in the way the vendors respond (some of which have been terrible).