Rate Limiting

• Setting a threshold of allowing requests.

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Client             Server             Database
[    ]----------->[      ]---------->[        ]
[    ]<-----------[      ]<----------[        ]

• Rate limiting protects DOS attacks.

• Rate limiting strategies:

  • By User:
  • By IP Address:
  • By Region:
  • By System:

You can use a small hash table of user → time accessed, and use that to rate limit.

• Redis is a perfect use case for this, as you can uniquely identify each user.

• We can use redis for this, with a master slave architecture to remove the single point of failure.