SQL and NoSQL Databases: Modeling, Languages, Security and Architectures for Big Data Management by Michael Kaufmann & Andreas Meier

SQL and NoSQL Databases: Modeling, Languages, Security and Architectures for Big Data Management by Michael Kaufmann & Andreas Meier

Author:Michael Kaufmann & Andreas Meier
Language: eng
Format: epub
ISBN: 9783031279089
Publisher: Springer Nature Switzerland


Durability (D): Database states must remain valid and be maintained until they are changed by a transaction. In case of software errors, system crashes, or errors on external storage media, durability retains the effects of a correctly completed transaction. In relation to the reboot and recovery procedures of databases, transactions can be considered a unit for recovery.

These four principles, Atomicity (A), Consistency (C), Isolation (I), and Durability (D), describe the ACID concept of transactions, which is the basis of several database systems and guarantees that all users can only make changes that lead from one consistent database state to another. Inconsistent interim states remain invisible externally and are rolled back in case of errors.



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