AWS - EBS

EBS -Elastic block storage

  1. To create block storage volumes.
  2. Attach to EC2 instance and create file system, run database etc.
  3. Automatic backup or storage replicated.
  4. Cannot mount 1EBS volume to multiple EC2 instances, instead use EFS.

EBS volume types

  1. General purpose SSD (GP2)
    1. Balances both price and performance.
    2. Ratio 3IOPS per GB up to 10K IOPS.
    3. Burst up to 3000 IOPS
  2. Provisioned IOPS SSD (IO1)
    1. For I/O intensive application like RDBMS
    2. Use if application needs above 10K IOPS.
    3. Can support up to 20K IOPS per volume.
  3. Magnetic storage (Old school)
    1. Throughput optimised HDD (ST1)
      1. Frequently accessed workloads.
      2. For Big data, Data warehouse, Log processing.
      3. Can not be boot volume.
    2. Cold HDD (SC1)
      1. Lowest of all for infrequently accessed workloads.
      2.  File server
      3. Can not be boot volume.
    3. Magnetic storage (Standard)
      1. Lowest cost per GB of all that is bootable.
      2. Magnetic volumes ideal for workloads.

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