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Message-ID: <40F3C6CE.6030602@alexisgallagher.com>
Date: Tue, 13 Jul 2004 12:26:06 +0100
From: Alexis Gallagher <alexis AT alexisgallagher DOT com>
Reply-To: alexis AT alexisgallagher DOT com
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To: Steven Hartland <killing AT multiplay DOT co DOT uk>
CC: cygwin AT cygwin DOT com
Subject: Re: rsync very slow, but not a network issue
References: <40F3BFC4 DOT 9060000 AT alexisgallagher DOT com> <009b01c468ca$217959e0$b3db87d4 AT multiplay DOT co DOT uk>
In-Reply-To: <009b01c468ca$217959e0$b3db87d4@multiplay.co.uk>
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Hi Steve,

Steven Hartland wrote:

> Is this not because its showing you the network transfer rate i.e. spending
> all its time doing compression and therefore not having to do actual
> network transfers? How long did each test take?
> 

I just performed the test again, this time timing the transfers with a 
stopwatch. (This time I was transferring a text file that consisted of 5 
million zeros, which is about 5MB.) Here's what I found.

    scp: 19 seconds
    rsync (no there): 17 seconds
    rsync (already there): 93 seconds

So it's taking much longer in real time when the file is already there, 
which is exactly the situation where rsync is supposed to accelerate teh 
transfer.

The cygwin machine is a Pentium III 1Ghz, and the eMac is a bit faster I 
believe. This should be fast enough that it's not bottlenecking on the 
hash computation, I think.

Cheers,
Alexis




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