However, initialization is billed even if the instance never processes a request. You can see the initialization time in logs and traces after an instance processes a request. When you enable Provisioned Concurrency for your function, your function's initialization code runs during allocation and every few hours, as running instances of your function are recycled. However, if you application needs persistent storage, consider using Amazon EFS or Amazon S3. Q: Can I use ephemeral storage while Provisioned Concurrency is enabled for my function? To learn more, please see Choosing between AWS Lambda data storage options in web apps. If your application requires storing data needed by code in a single function invocation, consider using AWS Lambda ephemeral storage as a transient cache. If your application needs durable, persistent storage, consider using Amazon S3 or Amazon EFS. Q: When should I use Amazon S3, Amazon EFS, or AWS Lambda ephemeral storage for my serverless applications? To learn more, see the AWS CloudWatch Lambda Insights documentation. You can use AWS CloudWatch Lambda Insight metrics to monitor your ephemeral storage usage. Q: What metrics can I use to monitor my AWS Lambda ephemeral storage usage? All data stored in ephemeral storage is encrypted at rest with a key managed by AWS. Q: Is AWS Lambda ephemeral storage encrypted? You can configure each Lambda function with its own ephemeral storage between 512MB and 10,240MB, in 1MB increments by using the AWS Lambda console, AWS Lambda API, or AWS CloudFormation template during function creation or update. Q: How do I configure my application to use AWS Lambda ephemeral storage? AWS Lambda ephemeral storage pricing is $0.0000000309 per GB-second, or $0.000111 per GB-hour and $0.08 per GB-month. Amazon EBS gp3 storage volume pricing in US East (Ohio) is $0.08 per GB-month. For comparison, in the US East (Ohio) region, the AWS Fargate ephemeral storage price is $0.000111 per GB-hour, or $0.08 per GB-month. When configuring your functions with more than 512MB of ephemeral storage, you will be charged based on the amount of storage you configure, and how long your function runs, metered in 1ms increments. The ephemeral storage is available in each function’s /tmp directory.Įach function has access to 512MB of storage at no additional cost. You can configure each Lambda function with its own ephemeral storage between 512MB and 10,240MB, in 1MB increments. Q: What if I need scratch space on disk for my AWS Lambda function? AWS Lambda provides easy scaling and high availability to your code without additional effort on your part. With Lambda, you do not have to provision your own instances Lambda performs all the operational and administrative activities on your behalf, including capacity provisioning, monitoring fleet health, applying security patches to the underlying compute resources, deploying your code, running a web service front end, and monitoring and logging your code. Amazon EC2 Container Service is a scalable management service that supports Docker containers and allows you to easily run distributed applications on a managed cluster of Amazon EC2 instances.ĪWS Lambda makes it easy to execute code in response to events, such as changes to Amazon S3 buckets, updates to an Amazon DynamoDB table, or custom events generated by your applications or devices. AWS Elastic Beanstalk offers an easy-to-use service for deploying and scaling web applications in which you retain ownership and full control over the underlying EC2 instances. With Amazon EC2 you are responsible for provisioning capacity, monitoring fleet health and performance, and designing for fault tolerance and scalability. Q: When should I use AWS Lambda versus Amazon EC2?Īmazon Web Services offers a set of compute services to meet a range of needs.Īmazon EC2 offers flexibility, with a wide range of instance types and the option to customize the operating system, network and security settings, and the entire software stack, allowing you to easily move existing applications to the cloud.
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