DIRTY READ Meaning and
Definition
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A dirty read refers to a data access scenario that occurs in concurrent systems or databases, where a transaction reads or retrieves uncommitted or "dirty" data from another transaction that has not yet been finalized or committed. It is also known as an uncommitted dependency. In this context, a transaction represents a sequence of operations performed on a database or data store.
In a dirty read scenario, a transaction retrieves and utilizes data that may be modified, rolled back, or deleted by another transaction before being finalized. This can lead to various problems, such as inconsistent or incorrect results, data integrity issues, and conflicts between concurrent transactions.
Dirty reads often occur in situations where isolation levels are set to a lower level, allowing transactions to access and read uncommitted data. While this can optimize performance and concurrency, it also increases the possibility of data anomalies and conflicts.
To mitigate the risks associated with dirty reads, databases typically offer various isolation levels, such as read committed or repeatable read, which provide different levels of data consistency and protection against dirty reads. Using appropriate locking mechanisms, concurrency control techniques, and transaction management systems can also help minimize the occurrence and impact of dirty reads in a database environment.
Common Misspellings for DIRTY READ
- sirty read
- xirty read
- cirty read
- firty read
- rirty read
- eirty read
- durty read
- djrty read
- dkrty read
- dorty read
- d9rty read
- d8rty read
- diety read
- didty read
- difty read
- ditty read
- di5ty read
- di4ty read
- dirry read
- dirfy read
Etymology of DIRTY READ
The term "dirty read" originated in the field of database management systems. The etymology can be understood as follows:
- "Dirty" refers to incomplete, unreliable, or uncommitted data. In a database context, it signifies that the data being read may be temporary, suspicious, or inaccurate.
- "Read" simply refers to accessing or retrieving data from a database.
So, when combined, "dirty read" specifically describes a situation when a user or application reads data from a database that is in an uncommitted or intermediate state, meaning the data may still be subject to changes or modifications.
It is important to note that the exact origin of the term may not be well-documented, as it emerged within the technical jargon of computer science and database systems.
