Read Concern "snapshot" for snapshot isolation...

TL;DR: I a previous post I explained why Why isn't "majority" the default read concern in MongoDB. If you’re used to SQL databases, you’ll likely prefer the snapshot read concern, which guarantees all rows are read from the same snapshot. Alternatively, run your operations in an explicit transaction, as transactions are ACID. With majority, you avoid dirty or uncommitted reads because you only see data acknowledged by a majority. However, a scan can yield while the majority state advances, so so