AWS Classroomnotes 01/Jun/2022

Storage in AWS

  • Storage Needs for a typical organization
    • Backups, archives, log files etc
    • Hard drives, network file shares (SAN, NAS) etc
    • Any files so that they can be downloaded (BLOB)
  • In AWS, we deal with virtual storage, so we need services for
    • Hard drives => Block Storages => Elastic Block Storage (EBS):
      • File Systems based on os (i.e. NTFS for windows, ext4/xfs/zfs on linux ) will be created on this disk (volume)
      • The Backup of this volume is called as snapshot.
      • EBS Volumes have types based on hardware
        • Hard disk drive (HDD)
        • Solid State Drive (SSD)
        • Magnetic disk
      • EBS Volumes speed is measured in IOPS (1 IOPS => 256KB/s (ssd)) and throughput (units/second)
      • EBS Volumes are scoped to Availability zones.
    • Network file share
    • BLOBs

Disk Storage

  • EBS is a block storage which is allocated from a different physical server than ec2 instance
  • Instance store is the block storage which is allocated from the same physical server where ec2 instance is created.
  • EBS can exist even after ec2 instance is deleted where as instance storage cannot exist.
  • Instance store is not supported for all the ec2 instance types, they exist for special needs only.

Network Storage

  • EFS & FSx are the services which provider network file shares alternatives to SAN/NAS storages
  • EFS & FSX support sync between AZ’s

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