seniorMongoDB
Explain the WiredTiger Storage Engine architecture.
Updated May 1, 2026
Short answer
WiredTiger is the default storage engine, utilizing document-level concurrency control and a sophisticated cache.
Deep explanation
It uses 'Checkpoints' to persist data to disk every 60 seconds and 'Journaling' for crash recovery. It provides compression (Snappy/Zlib) and handles high-concurrency writes better than the old MMAPv1 engine.
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