rate limiting per target across proxies

[#1]

Hi,

I have a requirement to rate limit per target (backend) that I know can be done using concurrent rate limiting policy.

Also, I need to enforce this rate limit across multiple proxies. Means, Multiple proxies connecting to the same backend should have a common (shared) rate limiting. Not sure if it is covered by the concurrent rate limit policy (target identifier) ?

I think this is very common requirement to prevent backend overload. Any alternative or better implementation approach would be appreciated.

Thanks.

[#2]

You can do the rate limiting in proxies and back-end adding mediation policy(for example Quota Policy) in proper step of your proxy configuration.

[#3]

the challenge is to have a mediation policy that measures across proxies and not just for single proxy. Not sure what is the construct(if any) in apigee that can help counting target calls across all proxies.