Latency based path selection

[Ryan Whelan]

Is it possible to make route selection based on path latency? (or even
delegate path selection to an external app/program/api?)

I'm currently using ospf (but can really use any igp) to manage
routing in a system with many end nodes all connected together via a
handful of servers (via vpn links) which are spread across the
country.

The problem is, the 'end nodes' are always moving/relocating and
currently have to be manually updated to use which ever server(s) are
closest / quickest.  It would be nice if there was a method or
protocol that could make path selection based on lowest avg latency.

The applications that transverse the network aren't bandwidth
intensive, but are very latency sensitive so detecting and using the
lowest latency path would ideal.

Any input / suggestions would be greatly appreciated!
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