Stat Servers- Reporting Vs Routing

[Shooter]

What is the difference between Routing Stat Server and Reporting Stat Server, in terms of their functionality and usage?
Can we use only one stat server for both the purposes i.e. reporting and routing?

[hsujdik]

It is not impossible, though it is highly recommended to split for means of less loading on them

[cavagnaro]

Technically there is no difference only as the name suggests what they are intended to do.
Routing usually is used only by URS as you need fast and reliable info to do routing.
Reporting is usually filled with a lot of metrics, filters and lot of clients which can affect its response time.
You don't want a StatServer slow for URS.
However if you env is small,yeah you could use both but doesn't harm to be ready and avoid issues by having them splitted in two or more.

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[Dionysis]

Separating them also means you can restart the routing ones without resetting everyone's CCPulse stats to 0.

[Adam G]

Dionysis is spot on - avoid sharing your configuration/framework, routing and reporting solution elements.  You don't want to have to stop the whole Platform from working just because CCPulse isn't showing the right stats!  Generally, you should house Config, Framework and Solution Applications on separate Servers, too... just in case a reboot is required.