Table of Contents

AWS Limits
- Bandwidths
- Direct Connect
- EC2
- NAT Gateway
- Route tables
- S3
- Transit Gateway
- VPC Peering

AWS Limits

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

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

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

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)

NAT Gateway

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

Route tables

Max 100 propagated routes

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

Transit Gateway

5000 attachments
50Gbps/attachment

VPC Peering

Max 125 VPC Peering connections per VPC
No bandwidth limit