[erlang-questions] trading systems

Joel Reymont <>
Thu Oct 1 22:02:13 CEST 2009

On Oct 1, 2009, at 8:50 PM, Jayson Vantuyl wrote:

> Concurrent + latency-sensitive + distributed == damn hard to  
> optimize in any language.

Not necessarily hard. It's perfectly fine to be concurrent at the  
process level, for example.

The difficulty with Erlang is tracking the state of all the message  
queues at any given moment and just plain figuring out what's going on  
among all the different processes. I have resorted to various tricks  
apart from tracing, e.g. putting stuff into the process dictionary at  
various stages of process life for ease of fetching via process_info.

> That said, Erlang certainly takes a specific mindset to optimize.   
> Are these built with Distributed Erlang?

Distributed Erlang indeed. Very distributed. Check the recent netsplit  
thread for some of the weirdness. Go back to the "Ultimate Erlang  
Challenge" for more.

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