Re: gaps in a tcp flow

[Mark Allman <[e-mail]>]

 
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Date: Wed, 30 Apr 2003 16:14:16 -0700
From: Rick Jones <[e-mail]>
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Organization: the Unofficial HP
To: [e-mail]
Subject: Re: gaps in a tcp flow

Murali Bashyam wrote:
> 
> Mark Allman wrote:
> 
> Doesn't this cause  problems for the initial RTT estimate of the
> server ? And in the attached example the delay seems to be negligible
> so it's ok, but if the client is delaying the ACK by 70 ms  to
> piggyback the GET request, it seems like a  variant of stretch ack
> violation.

I'll make the embarassing statement that I'm not familiar with "stretch
ack violation" and so a reference would be really nice.

Apart from that, it doesn't seem all that evil if the initial RTT is a
bit longer than it might be later.  If anything that would seem to be
"conservative" in the sense that it leads to a longer RTO and so less
likely to have a spurrious RTO. On top of that, most stacks start with
an intial RTO for the SYN or the SYN|ACK of something much larger than
the standalone ACK timer anyway.

rick
- -- 
Wisdom Teeth are impacted, people are affected by the effects of events.
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to raj in cup.hp.com  but NOT BOTH...

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