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To: oberman@es.net, to.my.trociny@gmail.com
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From: Pete French <petefrench@ticketswitch.com>
Cc: pjd@freebsd.org, freebsd-stable@freebsd.org
Subject: Re: hast vs ggate+gmirror sychrnoisation speed
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> If you are 50ms RTT from the remote system, the default buffer size will
> limit you to about 21 Mbps. Formula is Window-size(in bits/sec)/RTT(in
> sec.) The result is the absolute maximum possible bandwidth in
> bits/sec. Of course, you can replace window size with the bytes/sec and
> the result will be in bytes. 

I've got a ping time of around 100us (ranges from 0.093ms to 0.109ms)
So from your formula I should be able to saturate 1 gigabit ether.
I was getting around 90 meg/sevond using ggate

Am going to experiment now with the recompiled hastd using
the buffesr sizes I was using with ggate and see what happens.

thanks,

-pete.