Percona Server for MongoDB 3.4 is an enhanced, open source, and highly-scalable database that is a fully-compatible, drop-in replacement for MongoDB 3.4 Community Edition. It supports MongoDB 3.4 protocols and drivers.
Percona Server for MongoDB requires no changes to MongoDB applications or code.
This release is based on MongoDB 3.4.17. There are no additional improvements or new features on top of those upstream fixes.