TokuMX: High Performance for MongoDB
From the webpage:
TokuMXTM for MongoDB is here!
Tokutek, whose Fractal Tree® indexing technology has brought dramatic performance and scalability to MySQL and MariaDB users, now brings those same benefits to MongoDB users.
TokuMX is open source performance-enhancing software for MongoDB that make MongoDB more performant in large application with demanding requirements. In addition to replacing B-tree indexing with more modern technology, TokuMX adds transaction support, document-level locking for concurrent writes, and replication.
You have seen the performance specs on Fractal Tree indexing.
Now they are available for MongoDB!