Storage Considerations

Before launching an instance, consider the implications of the available storage types, including media, capacity, data persistence, and cost related to data persistence.

Storage Type Intended Use Case
Amazon EC2 Instance Local Storage Local (both SSD and HDD)
  • Storage is ephemeral and requires a running instance
  • Potential for data loss if instance fails
  • Data protection available using Teradata DSC
  • Lower reliability than EBS; HDD is lower reliability than SSD
SSD Only
  • Highest performance
  • Highest cost per vCPU per TB
  • Up to 6.4 TB of storage per EC2 instance
HDD Only
  • Lower performance than SSD
  • Lower cost per vCPU per TB than SSD
  • Up to 48 TB storage per EC2 instance
Amazon Elastic Block Storage (EBS) EBS (SSD)
  • Highest reliability
  • Lower performance (network-attached)
  • Lowest cost per vCPU even with extra charges for EBS
  • Up to 30 TB remote storage (pre-provisioned) on SSD volumes attached to the instance
  • Storage is expandable by attaching additional EBS volumes
  • Data persists independent of running an instance which provides the ability to shut down an instance between sessions to reduce EC2 costs and lower cost of ownership

Specific storage options depend on product and instance type. For information on AWS storage, see Amazon User Guide for Linux Instances.

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