Unverified50% confidenceFactExact time
The LSM tree is the foundation of modern NoSQL systems such as LevelDB, RocksDB, and Cassandra; writes first enter an in-memory buffer called a MemTable, which is sequentially flushed to an SSTable once a threshold is reached, with background compaction maintaining a multi-level sorted structure.
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Long-term
Relevance
9/11/2026
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