If you use MongoDB as a document store, arguably it's core functionality, you're not exposed to any of the shortcomings Jepsen rightly identified and exploited weaknesses in.
Transactions are new to MongoDB and they are not necessary for most. Structure your data model so you only perform single-document atomic transactions ($inc, $push, $pull) rather than making use of multi-document ACID transactions. It's possible, we're doing it for our ERP.
Sharding is something we've intentionally avoided opting for application-layer regional clusters. We specifically were avoiding other complexities related to shards that are not a concern for replica sets. Durability and maximum recovery time during emergency maintenance caused us to avoid them.
Transactions are new to MongoDB and they are not necessary for most. Structure your data model so you only perform single-document atomic transactions ($inc, $push, $pull) rather than making use of multi-document ACID transactions. It's possible, we're doing it for our ERP.
Sharding is something we've intentionally avoided opting for application-layer regional clusters. We specifically were avoiding other complexities related to shards that are not a concern for replica sets. Durability and maximum recovery time during emergency maintenance caused us to avoid them.