[lug] PoPToP Performance

[Ryan Wheaton]

Hey guys.

I did some testing last night, comparing file transfer speeds using 
different protocols, with and without the VPN.  I used the same 19.1 MB 
file do do each transfer.  Here's what I found:

With the VPN:

UPLOADING 	|	to windows file share, took about 13 minutes.
			|	using scp (secure copy) to a linux server, took about 10 minutes

DOWNLOADING	|	Using a browser (HTTP), got about 180Kb/sec transfer 
rate, took about 2 min 15 sec
				|	using wget (HTTP), got about 135.80Kb/sec transfer rate, took 2 
min 50 sec
				|	from windows file share (SMB), took about 9 minutes
				|	using scp from a linux server, took 2 min 13 sec

With out VPN:

UPLOADING	|	using scp to a linux server, took about 10 minutes

DOWNLOADING	|	using wget (HTTP) got 171Kb/s, took about 2 min 30 sec
				|	using a browser (HTTP) got 171.9 Kb/s took 1 min 53 sec
				|	using scp took 1 min 55 sec


and they seem to be comparable.  My biggest problem, and the thing that 
affects my users the most, is the sloooooow copy speed both up and down 
copying to windows file shares.  Any suggestions on how I can track 
down the bottleneck here or to improve performance?  I've got the WINS 
server set in my options.pptpd file...  should I remove this?  Is there 
any special routing that I can set up that will improve copy speeds?

thanks again for all the help before (and presently).

-rtw

On Monday, Feb 16, 2004, at 12:42 America/Denver, Calvin Dodge wrote:

> On Mon, Feb 16, 2004 at 09:37:10AM -0700, Ryan Wheaton wrote:
>>
>> I've finally gotten my PoPToP VPN server to accept connections
>> correctly, and all seems to be dandy, but it is unbelievably slow.  I
>> couldn't get exact Mb/s times, but when I tried to copy the CentOS 
>> ISOs
>> (about 1.8Gb) to a file share over the VPN, it was going to take about
>> 23 hours.  I have a cable modem at home, so i'd expect that 
>> performance
>
> You're doing this from Windows? That sounds a little slow, but not too 
> slow.
>
> I have a friend with a cable modem (150 KBps) in Boulder. He also uses 
> a VPN connection to the office server (Linux with PPTP).
>
> We timed some 5 megabyte copy operations. Ftp over the VPN runs around
> 135-140 KBps, while copying from Windows runs at around 50 KBps. 
> Database
> access is painful - Goldmine takes 20 minutes to open.  I suspect the
> Windows copy (and database) issue is due to latency - there are more 
> packets going back and forth, with a delay of .1-.2 second for each 
> round trip.
>
> Calvin
>
> -- 
> Calvin Dodge
> Certified Linux Bigot (tm)
> http://www.caldodge.fpcc.net
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