MongoDB Administrator's Guide

WiredTiger

WiredTiger provides the ability, for multiple clients, to perform write operations on the same collection. This is achieved by providing document-level concurrency such that during a given write operation, the database only locks a given document in the collection as against its predecessors, which would lock the entire collection. This drastically improves performance for write heavy applications. Additionally, WiredTiger provides compression of data for indexes and collections. The current compression algorithms used by WiredTiger are Google's Snappy and zLib. Although disabling compression is possible, one should not immediately jump this gun unless it is truly load-tested while planning your storage strategy.

WiredTiger uses ...