[Babel-users] Babel RTT settings for low and high latencies

[Marek Küthe]

On Wed, 17 Jul 2024 12:54:52 +0000
Thomas Gambier <thomas.gambier at nexedi.com> wrote:

> max-rtt-penalty 5000
> rtt-max 500
> rtt-decay 125

Thank you for sharing your experience with me!

On Wed, 17 Jul 2024 18:18:42 +0200
Juliusz Chroboczek <jch at irif.fr> wrote:

> >> Some of the VM's are in the same data center (latency < 1ms) and some
> >> are very far away (Germany <-> Hong Kong 300ms-400ms). Which rtt-min,
> >> rtt-max and rtt-cost/max-rtt-penalty would be suitable for such
> >> a network?  
> 
> rtt-min should be chosen so that all links below rtt-min are local -- the
> idea is that below rtt-min, it's not worth optimising the path.  The
> default value (10ms) should be fine in most networks.
> 
> rtt-max should be larger than all good links in your network -- the idea
> is that above rtt-max, it's no longer worth optimising the path.  In your
> case, you might want to increase the value to 350ms or so.

Thanks for the quick answers!

What should I set rtt-cost/max-rtt-penalty to?
 
> -- Juliusz


-- 
Marek Küthe
m.k at mk16.de
er/ihm he/him
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