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Date: Fri, 18 Oct 2002 16:19:52 +0900 (JST)
Message-Id: <20021018.161952.41628057.taka@valinux.co.jp>
To: trond.myklebust@fys.uio.no
Cc: habanero@us.ibm.com, neilb@cse.unsw.edu.au, davem@redhat.com,
       linux-kernel@vger.kernel.org, nfs@lists.sourceforge.net
Subject: Re: [NFS] Re: [PATCH] zerocopy NFS for 2.5.36
From: Hirokazu Takahashi <taka@valinux.co.jp>
In-Reply-To: <shs8z0w1f3k.fsf@charged.uio.no>
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Hello,

>      > Congestion avoidance mechanism of NFS clients might cause this
>      > situation.  I think the congestion window size is not enough
>      > for high end machines.  You can make the window be larger as a
>      > test.
> 
> The congestion avoidance window is supposed to adapt to the bandwidth
> that is available. Turn congestion avoidance off if you like, but my
> experience is that doing so tends to seriously degrade performance as
> the number of timeouts + resends skyrockets.

Yes, you must be right.

But I guess Andrew may use a great machine so that the transfer rate
has exeeded the maximum size of the congestion avoidance window.
Can we determin preferable maximum window size dynamically?

Thank you,
Hirokazu Takahashi.
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