데이터베이스

Transaction 이란? user: logical unit of work system: a program unit (sequence of instruction == transaction) ACID 성질 1) Atomicity > all or nothing 전

A (possibly concurrent) schedule is serializable if it is equivalent to serial schedule.순차적인 스케줄과 실행 결과가 같은 (equivalent한) 스케줄을 serializable 하다고 함.

Schedule must be Serializable and Recoverable✨ trade-off: amount of Concurrency <-> amount of Overhead.일반적인 경우 동시성으로 인해 throughput이 더 높아지긴 하지. 근데 그