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FREE · TOPIC 161

Memtable WAL And SSTable

479 words·Updated 2026-07-18·
#system-design#storage-engines#lsm-tree#wal
Accompanying Lab
Write-Ahead Log
A tiny durable key-value store that writes JSONL WAL records before applying in-memory state, then replays safe records after a crash.
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Primary References & Engineering Sources
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