ACID Properties of Database

Table of Contents

ACID (Atomicity, Consistency, Isolation, Durability) is a set of properties that are used to describe the behavior of a database. These properties are designed to ensure the reliability and consistency of a database, even in the event of failures or errors.

Here is a brief overview of the ACID properties:

Atomicity: This property ensures that a database transaction (a unit of work that is either completed or undone) is either completed in its entirety or not completed at all. This helps to ensure that the database remains in a consistent state, even if a failure or error occurs.
Consistency: This property ensures that a database remains in a consistent state after a transaction is completed. This means that the data in the database must meet all of the specified integrity constraints and requirements.
Isolation: This property ensures that the actions of one transaction are isolated from the actions of other transactions. This helps to prevent conflicts and ensure that the database remains in a consistent state.
Durability: This property ensures that once a transaction is completed, the changes it has made to the database are permanent and cannot be undone, even in the event of a failure or error.

By adhering to the ACID properties, a database can provide reliable and consistent data to applications and users.

ACID with examples

Here is an example of how ACID properties can be applied in MySQL:

Atomicity: Consider a banking system where a user wants to transfer $100 from their savings account to their checking account. This can be represented as a single database transaction that involves subtracting $100 from the savings account and adding $100 to the checking account.

If the database is using the ACID property of atomicity, then either both of these actions will be completed, or neither of them will be completed. This ensures that the database remains in a consistent state, even if a failure or error occurs during the transaction.

For example, if the database crashes while the transaction is being processed, the transaction will be rolled back and the database will be restored to its previous state, with no money transferred between the accounts.

Consistency: In this example, the database must ensure that the balances of both the savings and checking accounts remain consistent and accurate after the transaction is completed.

For example, if the checking account has a balance of $500 before the transaction, and the savings account has a balance of $1000, then the database must ensure that the checking account has a balance of $600 and the savings account has a balance of $900 after the transaction is completed.

Isolation: In this example, the database must ensure that the actions of this transaction are isolated from the actions of other transactions. This means that other users or applications should not be able to access or modify the balances of the accounts until the transaction is completed.
Durability: In this example, the database must ensure that the changes made by the transaction are permanent and cannot be undone, even in the event of a failure or error.

For example, if the database crashes after the transaction is completed, the changes made by the transaction should still be persisted when the database is restarted.

Overall, the ACID properties help to ensure the reliability and consistency of a database, even in the face of failures or errors. By adhering to these principles, a database can provide reliable and accurate data to applications and users.

ACID compliant databases on aws

There are several ACID-compliant database options available on Amazon Web Services (AWS). Here are a few examples:

Amazon Relational Database Service (RDS): This is a managed database service that makes it easy to set up, operate, and scale a relational database. Amazon RDS supports several ACID-compliant database engines, including MySQL, MariaDB, Oracle, and Microsoft SQL Server.
Amazon Aurora: This is a fully managed relational database engine that is designed to be compatible with MySQL and PostgreSQL. Amazon Aurora is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.
Amazon DynamoDB: This is a fully managed NoSQL database service that is designed to provide fast and predictable performance at any scale. Amazon DynamoDB supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.
Amazon DocumentDB: This is a fully managed document-oriented database service that is designed to be compatible with MongoDB. Amazon DocumentDB supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.

Overall, there are several ACID-compliant database options available on AWS, each with its own unique features and capabilities. You can choose the database that best meets the needs of your application and workload.

acid compliant databases on Azure

There are several ACID-compliant database options available on Microsoft Azure. Here are a few examples:

Azure SQL Database: This is a fully managed relational database service that is based on the SQL Server engine. Azure SQL Database is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.
Azure Cosmos DB: This is a fully managed NoSQL database service that is designed to provide fast and predictable performance at any scale. Azure Cosmos DB supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.
Azure Database for MySQL: This is a fully managed MySQL database service that is designed to be compatible with MySQL community edition. Azure Database for MySQL is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.
Azure Database for PostgreSQL: This is a fully managed PostgreSQL database service that is designed to be compatible with PostgreSQL community edition. Azure Database for PostgreSQL is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.

Overall, there are several ACID-compliant database options available on Azure, each with its own unique features and capabilities. You can choose the database that best meets the needs of your application and workload.

ACID compliant databases on GCP

There are several ACID-compliant database options available on Microsoft Azure. Here are a few examples:

Azure SQL Database: This is a fully managed relational database service that is based on the SQL Server engine. Azure SQL Database is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.
Azure Cosmos DB: This is a fully managed NoSQL database service that is designed to provide fast and predictable performance at any scale. Azure Cosmos DB supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.
Azure Database for MySQL: This is a fully managed MySQL database service that is designed to be compatible with MySQL community edition. Azure Database for MySQL is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.
Azure Database for PostgreSQL: This is a fully managed PostgreSQL database service that is designed to be compatible with PostgreSQL community edition. Azure Database for PostgreSQL is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.

acid compliant databases on Alibaba cloud

There are several ACID-compliant database options available on Alibaba Cloud. Here are a few examples:

ApsaraDB RDS: This is a fully managed relational database service that is based on the MySQL, SQL Server, and PostgreSQL engines. ApsaraDB RDS is highly scalable and provides high performance and reliability, making it a good choice for mission-critical applications.
ApsaraDB for MongoDB: This is a fully managed MongoDB database service that is designed to be scalable and easy to use. ApsaraDB for MongoDB supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.
ApsaraDB for Redis: This is a fully managed in-memory data store service that is designed to provide fast and predictable performance at any scale. ApsaraDB for Redis supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.
ApsaraDB for Cassandra: This is a fully managed Apache Cassandra database service that is designed to be scalable and easy to use. ApsaraDB for Cassandra supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.

Overall, there are several ACID-compliant database options available on Alibaba Cloud, each with its own unique features and capabilities. You can choose the database that best meets the needs of your application and workload.

acid compliant databases on DigitalOcean

DigitalOcean is a cloud infrastructure provider that offers a variety of options for hosting databases. There are several ACID-compliant database options available on DigitalOcean, including:

MySQL: This is a popular open-source relational database management system that is known for its high performance and reliability. MySQL is ACID-compliant and is a good choice for mission-critical applications.
PostgreSQL: This is a powerful open-source object-relational database management system that is known for its robustness and support for complex SQL. PostgreSQL is ACID-compliant and is a good choice for mission-critical applications.
MongoDB: This is a popular open-source NoSQL database management system that is designed to store and retrieve large amounts of data quickly. MongoDB supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.
Redis: This is an open-source in-memory data store that is designed to provide fast and predictable performance at any scale. Redis supports ACID transactions, which allow you to perform multiple operations as a single, all-or-nothing unit of work.

Overall, there are several ACID-compliant database options available on DigitalOcean, each with its own unique features and capabilities. You can choose the database that best meets the needs of your application and workload.