UPDATE LOCK Meaning and
Definition
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An update lock is a type of database lock that is employed to control and coordinate concurrent access to data in a database management system (DBMS). It is typically used to prevent data inconsistencies and conflicts that may arise when multiple transactions attempt to modify the same data simultaneously.
When an update lock is applied to a particular data item, it grants exclusive access to the transaction that holds the lock. This means that other transactions are prohibited from acquiring a conflicting lock, such as a write lock or an exclusive lock, on the same data item until the update lock is released. However, multiple transactions can still acquire a shared or read lock on the data item, allowing them to read the data simultaneously.
The primary purpose of an update lock is to ensure that a transaction can modify the data without interference from other concurrent transactions. By preventing conflicting operations, such as two transactions attempting to modify the same data simultaneously, an update lock helps maintain data integrity. It also helps prevent the phenomenon of dirty reads or non-repeatable reads, where a transaction reads data that is in an intermediate state due to another ongoing transaction.
Update locks are commonly used in database systems that follow the two-phase locking protocol, which ensures that no conflicting operations occur during the execution of concurrent transactions.
Common Misspellings for UPDATE LOCK
- ypdate lock
- hpdate lock
- jpdate lock
- ipdate lock
- 8pdate lock
- 7pdate lock
- uodate lock
- uldate lock
- u-date lock
- u0date lock
- upsate lock
- upxate lock
- upcate lock
- upfate lock
- uprate lock
- upeate lock
- updzte lock
- updste lock
- updwte lock
- updqte lock
Etymology of UPDATE LOCK
The term "update lock" is a compound word that combines "update" and "lock".
"Update" originates from the Latin word "updatare", which means "to bring up to date". It entered the English language in the mid-1940s with the meaning of "to bring to the modern standard" or "to amend or revise".
"Lock" comes from Old English "loc", which means "fastening" or "closure". Its usage as a verb, meaning "to fasten or secure with a lock", dates back to the early 13th century.
In the context of database management systems or computer programming, an "update lock" refers to a type of lock that prevents other transactions from acquiring conflicting locks on the same data object. This ensures data integrity when multiple processes are trying to update the same resource simultaneously.
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