rsync speed

Julian Pace Ross julian.paceross at gmail.com
Tue May 23 10:37:08 GMT 2006


Hmm.. could be.. I'll double check this evening and re-post.
Thx

Tony Abernethy wrote:

> Excuse the "humor", but it sounds like you have a virus.
> One of the virus that is called "anti".
> ( Case of the "cure" being worse than the disease? ;)
>
>     -----Original Message-----
>     *From:* rsync-bounces+tony=servacorp.com at lists.samba.org
>     [mailto:rsync-bounces+tony=servacorp.com at lists.samba.org]*On
>     Behalf Of *Julian Pace Ross
>     *Sent:* Tuesday, May 23, 2006 4:22 AM
>     *To:* Wayne Davison
>     *Cc:* rsync at lists.samba.org
>     *Subject:* Re: rsync speed
>
>
>>>Pushing the file from Windows to Linux over ssh takes around 15 min, with an
>>>average speed of ~400Kbps (using --progress).
>>>
>>>Pulling the same file using the same arguments takes around 45 mins, with an
>>>average speed of ~150Kbps.
>>>    
>>>
>>
>>Do you mean pulling it back again from Linux to Windows?  Or switching
>>machines and pulling it in the same direction from Windows to Linux?
>>I'm going to assume the former.
>>  
>>
>     Yep its the former... pushing and pulling from the same Windows PC
>     which is a P4. The linux server is a PIII....i delete the 350MB
>     file from the source/dest in turn in order to try it...
>
>>>It seems slow to me (ssh overhead??)
>>>    
>>>
>>
>>This depends on how slow (or loaded) your CPU is.  For instance, on an
>>old Pentium III 733mhz, the encrypting that ssh does cuts down the top
>>transfer speed compared to an unencrypted daemon connection (I think the
>>ssh connection was about 33% of the daemon connection, IIRC). 
>>  
>>
>     Both CPUs reach a max of 2-3%, so the bottleneck is somewhere else...
>
>>If you're backing-up over a local network, it may well be safe enough to
>>dropp the ssh transport of your daemon-style transfers and just run a
>>password-protected daemon on your Linux box. 
>>
>
>     I know, but I'm trying to simulate transfer over an internet
>     conncetion on my lan first.
>     I'll experiment further and let you know what I come up with...
>     but I'm quite sure its something particular to my setup.
>
>     Thanks wayne!
>     Julian
>

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