EBS

  • general

    • attached in same AZ
    • create snapshot cross AZ or region
    • Root EBS volume is deleted, by default
    • persists independently

  • encrypted

    • Public or shared snapshots of encrypted volumes are not supported
    • Existing unencrypted volumes cannot be encrypted directly. Can migrate from copy encripted snapshot
    • Supported on all Amazon EBS volume types, not instance type

  • performence

    • use raid0 , raid1 improve iops
    • EBS optimized with PIOPS EBS

  • price

    • charge with storage, I/O requests and snapshot storage
    • EBS backed EC2,very stop/start it will be charged as a separate hour
  • snapshot

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