6주차 [Database] Concurrency control(동시성 제어)#49
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leeejuhyeong wants to merge 12 commits intono-study-no-future:leeejuhyeongfrom
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6주차 [Database] Concurrency control(동시성 제어)#49leeejuhyeong wants to merge 12 commits intono-study-no-future:leeejuhyeongfrom
leeejuhyeong wants to merge 12 commits intono-study-no-future:leeejuhyeongfrom
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leeejuhyeong
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doho-ho
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Jan 23, 2022
Database/동시성 제어.md
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계속 lock을 해야한다는 말은 하나의 트랜잭션이 락을 획득한다면 그 락을 계속 유지해야한다는 뜻인가요?
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모든 트랜잭션이 lock을 할때는 lock만 할 수 있다는 의미입니다.
모든 lock 획득이 끝난 이후에 축소단계로 넘어갈 수 있습니다.
Database/동시성 제어.md
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이미지 왼쪽이 연쇄 복귀의 상황인가요?
y의 락을 획득한 뒤에 rollback이 될 때 y의 락을 건 트랜잭션까지 롤백 되는 상황..?
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이미지 왼쪽은 직렬 스케줄이 안된 Locking 방법일 때의 모습이고 오른쪽이 2PL 기법을 사용할 때입니다.
연쇄 복귀는... Recovery 때 자세히... 설명해드리겠읍니다..
Database/동시성 제어.md
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Database/동시성 제어.md
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Database/동시성 제어.md
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