====== AWS Limits ======

  * [[https://docs.aws.amazon.com/general/latest/gr/aws-general.pdf#aws-service-information|AWS Service Information]]
  * [[https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html|AWS Service Limit]]

^  Technologies  ^  Units  ^  Item\\ Size  ^  Timeout (s)  ^  Write                       ^  Requests                                  ^  Retention  ^
|  API Gateways  |         |               |  30           |                              |  Per region\\ 10,000/s\\ 5,000 concurrent  |             |
|  Dynamo DB     |         |  400KB        |               |                              |                                            |             |
|  Kinesis       |  Shard  |               |               |  1MB/s\\ 1000 Transaction/s  |                                            |  24hrs      |
|  Lambda        |         |               |  900          |                              |                                            |             |


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===== Bandwidths =====

  * VPC - No Limit
  * Internet Gateway - No Limit
  * VPC Peering - No Limit

  * NAT Gateway - 45Gbps

  * EC2
    * Within region - FULL of EC2
    * Other region, Internet or Direct Connect
      * 50% of FULL EC2 (32 vCPUs)
      * 5Gbps for other
    * With Intel 82599 VF interface
      * 10Gbps aggregate with multiple flow
      * 5Gbps per flow
    * With ENA
      * 10Gbps per flow in a placement group
      * 5Gbps per flow outside a placement group
      * Max 100Gbps aggregate with multiple flow
        * Within a VPC
        * Peered VPC in same region
        * S3 using VPC endpoint in same region
    * AWS P4d UltraClusters supercomputer
      * 400Gbps

  * Virtual Private Gateway (VGW)
    * VPN - 1.25Gbps aggregate
    * DX - DX port speed 

  * Transit Gateway
    * 1.25Gbps per VPN tunnel
    * 50Gbps total VPN bandwidth

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===== Direct Connect =====

  * Direct Connect via Private VIF
    * Max 10 VPC/VGW

  * Direct Connect via Transit VIF
    * Max 4 Transit VIF
    * Max 6 Transit GW per Transit VIF
    * Max 6 x 4 = 24 Transit gateways 

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===== EC2 =====

  * Up to 5Gbps outside VPC
  * Up to 10Gbps/flow in placement group
  * Up to 5Gbps/flow outside placement group
  * Up to 100Gbps aggregate in placement group (Enhanced Networking)

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===== NAT Gateway =====

  * Must use EIP
  * 5Gbps auto scale up to 100Gbps
  * 55,000 simultaneous connections
  * No Security Group

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===== Route tables =====

  * Max 100 propagated routes

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===== S3 =====

  * Objects can be 5TB in size
  * Durability = 99.999999999% (11 9s)
  * Availability = 99.99%
  * Max buckets (default) = 100
  * Virtual URL:
    * http://bucket.s3.amazonaws.com
    * http://bucket.s3-aws-region.amazonaws.com
  * Path URL:
    * http://s3-aws-region.amazonaws.com/bucket
    * <Path style URL will be deprecated for all new buckets from Sep 2020>
  * Object Key names use UTF-8 encoding and must not be longer than 1024 bytes
  * Charges
    * Storage
    * Requests
    * Data Transfer Pricing (only data out. data into AWS is free)
    * Transfer Acceleration
    * Management Functions
      * Monitoring metrics
      * Storage Class Analysis
      * S3 Inventory
    * Object Tagging

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===== Transit Gateway =====

  * 5000 attachments
  * 50Gbps/attachment

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===== VPC Peering =====

  * Max 125 VPC Peering connections per VPC
  * No bandwidth limit


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