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  • AWS EC2 pricing official doc:
    Amazon EC2, Amazon RDS, Amazon Redshift or Amazon ElastiCache instances, Amazon Elastic Load Balancing, or Elastic Network Interfaces in another Availability Zone or peered VPC in the same AWS Region $0.01 per GB


  • Be careful when designing HA architecture, as paying $0.01 per GB may soon be one of your biggest cost factor
  • For some scenarios it may be better to store data shared among hosts using S3 - tranfer is free, it’s highly durable and can be pretty fast too, be careful though about other cost factors (number requests, traffic)

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