# Amazon Aurora Serverless

Amazon Aurora Serverless is an on-demand, autoscaling configuration for [Amazon Aurora](https://aws.amazon.com/rds/aurora/). It automatically starts up, shuts down, and scales capacity up or down based on your application's needs. You can run your database in the cloud without managing any database instances. You can also use Aurora Serverless v2 instances along with provisioned instances in your existing or new database clusters.

Manually managing database capacity can take up valuable time and can lead to inefficient use of database resources. With Aurora Serverless, you create a database, specify the desired database capacity range, and connect your applications. You pay on a per-second basis for the database capacity that you use when the database is active, and migrate between standard and serverless configurations with a few steps in the Amazon Relational Database Service (Amazon RDS) console.

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Amazon Aurora Serverless v2 scales instantly to hundreds of thousands of transactions in a fraction of a second. As it scales, it adjusts capacity in fine-grained increments to provide the right amount of database resources that the application needs. There is no database capacity for you to manage. You pay only for the capacity your application consumes, and you can save up to 90% of your database cost compared to the cost of provisioning capacity for peak load.

Aurora Serverless v2 supports all manner of database workloads. Examples include development and test environments, websites, and applications that have infrequent, intermittent, or unpredictable workloads to the most demanding, business critical applications that require high scale and high availability. It supports the full breadth of Aurora features, including global database, Multi-AZ deployments, and read replicas. Aurora Serverless v2 is available for the Amazon Aurora MySQL-Compatible Edition and PostgreSQL-Compatible Edition.

### Benefits <a href="#benefits" id="benefits"></a>

#### Highly scalable <a href="#highly_scalable" id="highly_scalable"></a>

Scale instantly to hundreds of thousands of transactions in a fraction of a second.<br>

#### Highly available <a href="#highly_available" id="highly_available"></a>

Power your business-critical workloads with the full breadth of Aurora features, including cloning, global database, Multi-AZ, and read replicas.<br>

#### Cost effective <a href="#cost_effective" id="cost_effective"></a>

Scale out fine-grained increments to provide just the right number of database resources and pay only for capacity consumed.<br>

#### Simple <a href="#simple" id="simple"></a>

Removes the complexity of provisioning and managing database capacity. The database will scale to match your application’s needs.<br>

#### Transparent <a href="#transparent" id="transparent"></a>

Scale database capacity instantly, without disrupting incoming application requests.<br>

#### Durable <a href="#durable" id="durable"></a>

Protects against data loss using the distributed, fault-tolerant, self-healing Aurora storage with six-way replication.<br>

### Use cases <a href="#use_cases" id="use_cases"></a>

#### Variable workloads <a href="#variable_workloads" id="variable_workloads"></a>

You're running an infrequently-used application, with peaks of 30 minutes to several hours a few times each day or several times per year, such as a human resources, budgeting, or operational reporting application. You no longer have to provision to peak capacity, which would require you to pay for resources you don't continuously use, or to average capacity, which would risk performance problems and a poor user experience.<br>

#### Unpredictable workloads <a href="#unpredictable_workloads" id="unpredictable_workloads"></a>

You're running workloads with database usage throughout the day, and also peaks of activity that are hard to predict. For example, a traffic site that might see a surge of activity when it starts raining. Your database will automatically scale capacity to meet the needs of the application's peak load and scale back down when the surge of activity is over.<br>

#### Enterprise database fleet management NEW <a href="#enterprise_database_fleet_management" id="enterprise_database_fleet_management"></a>

Enterprises with hundreds or thousands of applications, each backed by one or more databases, must manage resources for their entire database fleet. As application requirements fluctuate, continuously monitoring and adjusting capacity for each and every database to ensure high performance, high availability, and remaining under budget is a daunting task. With Aurora Serverless v2, database capacity is automatically adjusted based on application demand. You no longer need to manually manage thousands of databases in your database fleet. Features such as global database and Multi-AZ deployments ensure high availability and fast recovery.<br>

#### Software as a service applications NEW <a href="#software_as_a_service_applications" id="software_as_a_service_applications"></a>

Software as a service (SaaS) vendors typically operate hundreds or thousands of Aurora databases, each supporting a different customer, in a single cluster to improve utilization and cost efficiency. But they still need to manage each database individually, including monitoring for and responding to colocate databases in the same cluster that may take up more shared resources than originally planned. With Aurora Serverless v2, SaaS vendors can provision Aurora database clusters for each individual customer without worrying about costs of provisioned capacity. It automatically shuts down databases when they are not in use to save costs and instantly adjusts databases capacity to meet changing application requirements.<br>

#### Scaled-out databases split across multiple servers NEW <a href="#scaled-out_databases_split_across_multiple_servers_" id="scaled-out_databases_split_across_multiple_servers_"></a>

Customers with high write or read requirements often split databases across several instances to achieve higher throughput. However, customers often provision too many or too few instances, increasing cost or limiting scale. With Aurora Serverless v2, customers split databases across several Aurora instances and let the service adjust capacity instantly and automatically based on need. It seamlessly adjusts capacity for each node with no downtime or disruption, and uses only the amount of capacity needed to support applications.
