Write-Ahead Log: Crash Recovery Technique
Databases lie to you. When your application receives a ‘commit successful’ response, the data might only exist in volatile memory. A power failure milliseconds later could erase that transaction…
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Database Write-Ahead Log: Crash Recovery Mechanism
When your application commits a transaction, you expect that data to survive a crash. This is the ‘D’ in ACID—durability. But here’s the challenge: writing every change directly to disk is…
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