AWS EC2 Instance Store
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An AWS EC2 Instance Store is a temporary block level storage volume (filesystem volume) provided by the AWS EBS service.
- Context:
- It can be added to an [[EC2 http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/add-instance-store-volumes.html
- It can be attached to an EC2 Instance.
- It can (often) be used as temporary storage of information that changes frequently, such as buffers, caches, scratch data, and other temporary content, or for data that is replicated across a fleet of instances, such as a load-balanced pool of web servers.
- Example(s):
- …
- Counter-Example(s):
- an AWS EBS Volume.
- an AWS S3 Bucket.
- See: Physically Attached Diskdrive, Network Attached Storage, Backed-up Filesystem.
References
2016
- http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Storage.html
- QUOTE: Amazon EC2 Instance Store: Many instances can access storage from disks that are physically attached to the host computer. This disk storage is referred to as instance store. Instance store provides temporary block-level storage for instances. The data on an instance store volume persists only during the life of the associated instance; if you stop or terminate an instance, any data on instance store volumes is lost.
- http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html
- QUOTE: An instance store provides temporary block-level storage for your instance. This storage is located on disks that are physically attached to the host computer. Instance store is ideal for temporary storage of information that changes frequently, such as buffers, caches, scratch data, and other temporary content, or for data that is replicated across a fleet of instances, such as a load-balanced pool of web servers.
An instance store consists of one or more instance store volumes exposed as block devices. The size of an instance store varies by instance type. The virtual devices for instance store volumes are ephemeral[0-23]. Instance types that support one instance store volume have ephemeral0. Instance types that support two instance store volumes have ephemeral0 and ephemeral1, and so on. While an instance store is dedicated to a particular instance, the disk subsystem is shared among instances on a host computer.
- QUOTE: An instance store provides temporary block-level storage for your instance. This storage is located on disks that are physically attached to the host computer. Instance store is ideal for temporary storage of information that changes frequently, such as buffers, caches, scratch data, and other temporary content, or for data that is replicated across a fleet of instances, such as a load-balanced pool of web servers.
- http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/add-instance-store-volumes.html
- QUOTE: You can specify the instance store volumes for your instance only when you launch an instance. You can't attach instance store volumes to an instance after you've launched it.
The number and size of available instance store volumes for your instance varies by instance type. Some instance types do not support instance store volumes.
- QUOTE: You can specify the instance store volumes for your instance only when you launch an instance. You can't attach instance store volumes to an instance after you've launched it.