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EBS

General Purpose - SSD

  • 1 IOPS => 1 IO (16KB) in 1 second
  • Initial capacity - 5.4 million IO Credits => 3000 IOPs
    • great for boots and initial workloads

gp3 is cheaper than gp2 for base performance

gp2 gp3
Volume 1GB-16TB 1GB-16TB
IOPs credit
  • Baseline performance (100 IO credits/s) + 3 IO Credits/s per GB
  • Volumes > 1000GB does not use credit system
 no credit bucket system
  • Baseline performance - 3000 IOPS + 125 MiB/s
  • Extra cost upto 16,000 and 1000 MiB/s
Max IOPS per volume (16KiB I/O) 16,000 16,000
Max throughput per volume 250 MiB/s * 1,000 MiB/s
Boot volume Supported Supported
Use Cases
  • Low-latency interactive apps
  • Development and test environments
 +
  • virutal machine
  • single instance DB
Amazon EBS Multi-attach Not supported Not supported

Provisioned IOPS SSD (io1/2)

  • IOPS can be adjusted independently of size
  • Consistent Low Latency & jitter
block express io1/io2
Volume 4GB- 64TB 4GB-16TB
Max IOPS per volume (16KiB I/O) 256,000 64,000
Amazon EBS Multi-attach Supported Supported
Max throughput per volume 4000 MiB/s * 1,000 MiB/s
Use Cases Workloads that require:
  • Sub-millisecond latency
  • Sustained IOPS performance
  • More than 64,000 IOPS or 1,000 MiB/s of throughput
    		•
    • Workloads that require sustained IOPS performance or more than 16,000 IOPS
    • I/O-intensive database workloads

    provisioned-iops

    Hard Disk Drive (HDD)

    • st2 (throughput optimized) and sc2 (cold HDD)

    ebs-hdd

    Instance Store

    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.

    • Block Storage Devices
    • Physically connected to one EC2 Host
    • Instances on that host can access them
    • Highest storage performance in AWS
      • already included with the instance price
    • CAN ONLY BE ATTACHED AT LAUNCH TIME

    • Instances moving between hosts will lose the access to the ephemeral volumes

      • if hardware hosting the ephemeral volume is lost, the data in the volume is also lost

    • NOT all the instances support instance store volumes, larger the size of the instance, larger no. of instance volumes can be allocated

    EBS vs Instance Store

    EBS Instance Store
    Persistence
    Reslience
    Storage isolated from instance lifecycle
    Resilence w/App In-built Replication... ... it depends
    High performance needs... ... it depends
    Super high performance needs
    Cost already included within instance price
    • Cheap = ST1 or SC1
    • Throughput..streaming - ST1
    • Boot - not ST1 or SC1
    • GP2/3 - up to 16,000 IOPS
    • io1/2 - up to 64,000 IOPS (*256,000)
    • RAID0 + EBS up to 260,000 IOPS (io1/2-BE/GP2GP3)
    • More than 260,000 IOPS - INSTANCE STORE