What Does Durability Mean?
Durability in databases is the property that ensures transactions are saved permanently and do not accidentally disappear or get erased, even during a database crash. This is usually achieved by saving all transactions to a non-volatile storage medium.
Durability is part of the ACID acronym, which stands for atomicity, consistency, isolation and durability. ACID is a set of properties guaranteeing the reliability of all database transactions.
Techopedia Explains Durability
There are several organizations, such as banks and hospitals, whose very existence depends on the information systems run on databases. The ability to recover 100% of all committed transactions is absolutely crucial. The recovery rate must be 100 percent, not 90 percent or even 99.6 percent. In addition, this recovery must be permanent, meaning all transactions must be reconstructed, even if the database server crashes due to OS failure or power loss.
