[lug] Samba, VPN, unison & speed

[Ben Luey]

> sorry i don't have an answer for you.  but i was curious as to what method and or commands you use to determine those 20% and 50% "best" bandwidth utilization figures.  i would like to be able to determine similar types of things if you care to share.
The glib answer is math :)  On Windows, I use process manager to look at 
the traffic on the line and it reports in Network Utilization. So if I'm 
on a 100 Mbps  ethernet connection, but I have a 1.5Mbps internet 
connection, my max through-put  is 1.5%. So 0.5% utilization is 33% of 
my theoretical max. Under Linux I use gnome's system monitor (process 
monitor? I can't remember) and it reports in kB/s, so I multiply by 8 to 
get it until kbps and take the ratio compared to what I should get based 
on my network connection to the machine.

In response to John, I get ~90ms on pings. Samba is running 3.5.6 on a 
LAN with a mix of XP and Win 7 machines. Can samba use smb2 on a mixed 
network, or if there is one old machine, does everything have to be on smb1?

Ben


>> I'm running Debian Squeeze with Samba 3.5.6 and OpenVPN. It works fine,
>> but using file sharing over the VPN is very slow. I've read that the smb
>> protocol doesn't play nice with network latency, etc, so maybe there is
>> nothing I can do about it, but I'm curious if anyone has any
>> suggestions. Transferring large files utilizes at best 20% of bandwidth
>> (direct wireless connetion to the vpn, or fast internet connection) (On
>> wired 100MB/s ethernet without VPN, I get 50% utilization). Doing lots
>> of dirs and small file look-ups are significantly slower. This is
>> particularly a problem when using unison to sync diectories on a Windows
>> machine (fastcheck is enabled in unison), which is really mostly what I
>> care about.
>>
>> I've tried adding
>> max protocol = SMB2 to samba, but speed tests under Win 7&  Ubuntu 11.10
>> were the same. Maybe the solution is not to have unison run on top of
>> windows file sharing, but users don't have shell/ssh access so I don't
>> know how else to do it.
>>
>> Any ideas appreciated. Thanks,
>>
>> Ben
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