EBS - sergeyzolotukhin/learn-java-gradle GitHub Wiki

EBS - Elastic Block Store

SSD - Solid state drive

General Purpose SSD volumes

  • gp2 - default (OS, boot disk/ root device)
  • gp3 - high performance - for database, virtual desktops, hadoop - 4 time faster

Provisioned IOPS SSD volumes

  • io2 Block Express 3 - super high performance -
  • io1 - lagecy

HHD - Hard disk drive

Throughput Optimized HDD volumes

  • st1 - low-cost hdd - can not be a boot volume

Cold HDD volumes

  • st2 - lowest cost hdd - use where performace is not important - can not be a boot volume

Automatic replicate within a single AZ Dynamicy increase, change volume type, with no downtime and performance impact

Snapshot

stored on s3 incremental

exclude caches can be consistent - recommended stop instance share across same regin encrypted if ebs is encrypted

EBS in same AZ as a EC2 instance

Clone instance in another region

volume -> snapshot -> copy to target region -> create image (AMI) - launch instance copy unencrypted snapshot can be encrypted

How to encrypted volume

volume -> snapshot -> copy with encryption -> create image (AMI) - launch instance

data moving from volume to EC2 instance is encrypted if volume is encrypted

Hibernate

fast boot store ram no more 60 days

AMI - Amazon Machine Images

AMI are categorize as either backed by:

  • Amazon EBS - root device EBS create from AMI can be stop / reboot we do not lose data, if it is stopped By default the root device will be deleted on terminate
  • Instance store - root device create from template on S3 - ephemeral store - cannot be stopped - if host fails you will lost your data can reboot without lost data

The key difference between stopping and terminating an instance is that the attached bootable EBS volume will not be deleted

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