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apache / trafficcontrol

Apache Traffic Control is an Open Source implementation of a Content Delivery Network
https://trafficcontrol.apache.org/
Apache License 2.0
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[TC-387] Max IP Address in DNS Answer - Make Dynamic based on Traffic Load #951

Open limited opened 7 years ago

limited commented 7 years ago

Currently when we build a DNS routed service there is a parameter assigned called maximum IP address which determines how many cache IPs in each cache group should be handed out to the DNS system for the client. This determines the number of caches across which content is assigned. For small services we typically assign 1-2 caches for larger services we assign 3-5 caches.

This is currently done manually and if a service grows rapidly they could be handling a large volume of traffic and only have one cache in each group assigned.

I would like to consider some type of feedback loop which gages the popularity of a service and dynamically adjusts the number of cache IPs handed out.

We should also consider splitting up this behavior of tying DNS address hand out to the number of caches across which we hash content. These should be separate configuration and only the number of caches to hash across needs to be dynamic.

Author: Ryan Durfey JIRA Link: https://issues.apache.org/jira/browse/TC-387

ashish-timilsina commented 6 years ago

@ryandurfey @ashish-timilsina