Ephemeral disk5/31/2023 Furthermore, there is no charge associated with the ephemeral storage.Ĭontent stored in ephemeral storage survives reboots, however, when an EC2 instance is stopped, terminated or restarted, all the content stored in the instance storage is lost. As a result, the disk access is extremely fast, setting aside the constraints of the physical media. Since the storage is local to the host, there is no network I/O overhead for reading or updating the content. When an EC2 instance/container is launched, a mount point can be created in the Guest VM and mounted to a portion of the disk from the underlying host. What is Ephemeral Storage (Instance Storage)?Įach EC2 guest instance (or container) can use the disk storage attached to the physical host. The end use cases dictate the optimal storage service to be used in different scenarios. The last item in the list, S3 ecosystem, is centered around the object storage. These three offer Portable Operating System Interface (POSIX) compliances. The first three items in the list above - ephemeral storage, elastic block storage and elastic file system - are different abstractions around block storage.
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