Tino Schwarze wrote:
> On Wed, Aug 19, 2009 at 10:58:19AM -0500, Jim Leonard wrote:
>> Tino Schwarze wrote:
>>> I'd rule out the network. Samba might be doing fancy things to the TCP
>>> level etc. Or you might try establishing an ssh tunnel to the Windows
>>> host (or from Windows host to BackupPC server using putty which might be
>>> easier), then point rsyncd to the local end of the tunnel.
>> I've already ruled out the network; I'm able to prove that rsyncd on the 
>> windows side is simply not very fast :-(  In fact, I'm almost willing to 
>> bet money that, if everyone checks their Full backup times, none of the 
>> rsync ones will be over 10MB/s.  Why is rsyncd performance so bad in 
>> Windows?
> 
> Alright, I can verify that. I just tried with a fresh install of Cygwin
> and rsyncd. Copying an 8GB file via rsyncd yields about 14 MB/s. Using
> plain smbclient, I get "average 40119.7 kb/s" which is about the maximum
> write speed of the RAID.
> 
> Maybe there is some tuning possible with the socket options
> configuration parameter. I couldn't find any recommendations though.

Most of the people using backuppc are probably linux oriented so bad 
performance on windows is just expected, and compensated for by running 
more instances concurrently if the server is waiting.  But, I'd try 
adding something like:
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=65536
to the rsyncd/deltacopy.conf file (and restart) to see if it helps.

http://support.microsoft.com/kb/329781
http://support.microsoft.com/kb/214397/EN-US/

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com

------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with 
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki:    http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/