netdev - Re: TCP congestion control for fast, short-distance networks ?

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Message-ID: <20070404153911.GA32019@galon.ev-en.org>
Date:	Wed, 4 Apr 2007 18:39:11 +0300
From:	Baruch Even <baruch@...en.org>
To:	davef1624@....com
Cc:	shemminger@...ux-foundation.org, netdev@...r.kernel.org
Subject: Re: TCP congestion control for fast, short-distance networks ?

* davef1624@....com <davef1624@....com> [070404 18:29]:
> Hello,
> 
> We are currently using both 1 Gb & 10 Gb links, that interconnect several servers that are very *local* to 
> each other.
> Typical RTT times range from 0.2 ms - 0.3 ms.
> 
> We are currently using TCP reno - is there a more suitable congestion control algorithm for our 
> application,
> especially using the 10 Gb links ?
> (Most of the High-Speed TCP algorithms seem suitable for large RTT, long-distance networks).

I'm not aware of any tests for high speed links with very low RTTs, but
I suspect that the new algorithms will not change much, if the
connections you have are indeed local than the Ethernet pause mechanism
is more effective for the flow control you need.

Baruch
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