Q43: What is the WiredTiger Storage Engine and what features does it provide?
WiredTiger is the default storage engine for MongoDB. Key features:
- Document-Level Concurrency: Uses optimistic concurrency control for concurrent document writes.
- Snappy / Zlib Compression: Compresses data and indexes on disk to save up to 70% storage.
- Memory Checkpoints & Journaling: Ensures durability and fast recovery.
Key Takeaways
- Default storage engine since MongoDB 3.2.
- Provides document-level concurrency locking and transparent data compression.
Knowledge Check
What concurrency control level does the WiredTiger storage engine provide for write operations?