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Re: How to improve scp speed?
- From: "Cary Jamison" <Cary_Jamison at Symantec dot com>
- To: cygwin at cygwin dot com
- Date: Thu, 1 Dec 2005 13:40:47 -0700
- Subject: Re: How to improve scp speed?
- References: <firstname.lastname@example.org> <BAY105-F2693514CAA56EEF86ECAC3E9480@phx.gbl> <email@example.com> <438D6EE0.firstname.lastname@example.org> <email@example.com> <438E30CB.4327D914@dessent.net>
Brian Dessent typed:
> Cary Jamison wrote:
>> I think we all know that encryption is a factor. The site still
>> states :
> No, I wouldn't say that we all know that. I just ran "openssl speed"
> and on my very modest Athlon XP 1700 machine and both the aes-128 and
> blowfish ciphers clocked in at approximately 60-65 megabytes/sec
> throughput. That's about 50 times faster than the theoretical maximum
> throughput of 10Base-T ethernet. Even this modest system can encrypt
> 5 times faster than the absolute maximum rate of 100 megabit ethernet.
> I think you are vastly overestimating the CPU requirement of
> encryption. And it is also why the original poster should not waste
> his time trying to find a nonexistent, useless, and insecure option to
> disable encryption.
Ok, I probably am. But, you wouldn't expect the buffer tuning to make such
a big difference, either, since a fast processor can surely move data around
in memory several times faster than it can move it over the net. All these
things add up, though....
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