Transactional databases guarantee durability of your changes, even in face of unexpected power outage.
How does that mechanism work? How does a database guarantee a committed transaction is made durable? How does it guarantee the rollback of uncommitted changes?
We will explain the performance characteristics of an OLTP database, and how spinning disk characteristics dictated the classic redo logs and rollback segments approach. We will consider complex scenarios of committed and uncommitted transactions, with dirty pages and limited memory, and illustrate a complete crash recovery process.
How durability works in transactional databases
Short Talk (20 Minutes)
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