Sharedlockvsexclusivelock

2022年5月14日 — The shared lock ensures that a record is not in the process of being updated during a read-only request. It is also used to prevent updates of a ...

2023年3月17日 — Shared lock can be placed on objects that do not have an exclusive lock already placed on them. Exclusive lock can only be placed on objects ...

2021年10月4日 — Both these locks are usually used in the Database in order to ensure control over the transactions that happen concurrently at the same time ...

Exclusive locks. Exclusive locks protect updates to file resources, both recoverable and non-recoverable. They can be owned by only one transaction at a time.

A shared lock means multiple transactions can be holding the same lock at the same time, where same lock is a combination of resource type and resource id.

2012年8月6日 — Exclusive lock mode prevents the associated resource from being shared. This lock mode is obtained to modify data. The first transaction to lock ...

互斥鎖定(Exclusive Lock)：它禁止相關資源共享。如果一異動交易以互斥鎖定方式封鎖某資源，則僅有該異動交易被允許更新該資源的資料，直到該異動交易釋放對該資源的鎖定。

2019年6月20日 — Shared Lock (Read Lock, S-Lock). 資料被加上Shared Lock 時，就無法再被加上Exclusive Lock，所以其他Transaction 將無法對這筆資料做寫 ...

Shared lock vs Exclusive lock. shared lock 就是read lock. exclusive lock 就是write lock. 換個名稱而已= = Others. 確保讀取者讀 ...