ACID Transactions – ACID Properties in DBMS Explained Here

ACID Properties in DBMS

What is ACID? To figure out the definition of ACID, you need to understand what the transaction is. Transaction is more often mentioned in the economic business, but concerning databases and data storage systems, transaction is treated as a single logical unit of work, accessing and changing the contents of the database.

In the context of transaction in computer science, ACID is short of Atomicity, Consistency, Isolation, and Durability. Most transactions are executed as ACID properties in DBMS and the goal of ACID properties of transactions is to maintain the consistency and correctness of the database before and after the transaction.

Therefore, ACID transactions plays an important role in keeping your data integrity when the transaction starts in your computer.

Related article: Resolved! What Is S3 (Simple Storage Service)? Do You Need It?

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ACID Transactions – Atomicity

As we mentioned, transaction will make changes on database. One big specialty is that all changes to data are performed as if they are a single operation.

Since transaction is composed of multiple statements, if any statement fails to complete, the whole transaction is turned to be failed and the database won’t be changed. In other words, either the entire transaction takes place at once or doesn’t happen at all and no midway happens.

The database can keep a record of every change and when the connection is interrupted, the changes are undone. This property can effectively prevent data loss and corruption from occurring.

ACID Transactions – Consistency

Consistency can be regarded as a process that data is in a consistent state when a transaction starts and when it ends. The data will be changed by transactions only in predictable and predefined ways.

With this property, the correctness of a database is ensured and the corruption and error in your data do not create unintended consequences for the integrity of your table.

ACID Transactions – Isolation

With the property of isolation, multiple transactions can occur concurrently without each other interfering with themselves. Besides, the intermediate state of a transaction is invisible to other transactions.

ACID Transactions – Durability

The property can make sure that when the transaction has been performed, the modifications in the database can be stored, even in the event of a system failure. The transaction’s changes are saved to the database permanently. The responsibility for maintaining this property is Recovery Manager.

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Advantages and Disadvantages of ACID Transactions

Then, there are some advantages and disadvantages of ACID transactions you may be interested in. Please keep reading here.

Advantages of ACID Properties in DBMS

1. ACID properties in DBSM can ensure your data consistent and accurate.
2. ACID properties in DBSM can maintain the data integrity and make sure the changes in the database are permanent.
3. Multiple transactions can occur concurrently with the help of ACID properties to prevent interference between them.
4. ACID properties in DBSM can help the system recover the data to the point of failure or crashes.

Disadvantages of ACID Properties in DBMS

1. ACID properties requires additional processing to make data consistency and integrity, causing a performance overhead in the system.
2. Scalability issues may be triggered by the ACID properties when multiple transactions occur concurrently.
3. ACID properties requires more resources and expertise and increase the complexity of the system.

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Wrapping It Up

Now, after reading this article, you may have understood the meaning of ACID transactions. If you have any other related questions, you can leave messages below and we will try the best to fix them up.