Rsync's Speed

[Steve Sills]

Well I belive I found the problem.  It was a bad network card, after
replacing it, and upgrading rsync, my SSHD usage is between 42 and 72%, and
rsync is about about 23%, this is the initial download as I need to test thr
progess. The download now takes about 35 mins for 11 GB, much better.
Thanks for everyones help.


Steve Sills
Platnum Computers, President
http://www.platnum.com
steve at platnum.com
----- Original Message ----- 
From: "jw schultz" <jw at pegasys.ws>
To: "Steve Sills" <steve at platnum.com>
Sent: Thursday, January 22, 2004 2:02 PM
Subject: Re: Rsync's Speed


> On Thu, Jan 22, 2004 at 01:52:23PM -0700, Steve Sills wrote:
> > The source server is a Dual 800 Mhz /w a 7200 RPM 40 GB HDD, the dest
server
> > is a P III 450 with a 7200 RPM 30 GB HDD, both have a 100 MB/S network
card,
> > and attached to a 100 MB switch.  The ssh was taking 1.7 % of the CPU
time,
> > and rsync 4.7 I have turned off compression, and will upgrade rsync to
2.6,
> > see if that helps any.  Thanks for your help.
>
> 1.7% is nothing.  Upgrading rsync will almost certainly
> improve performance.
>
> Note: 100MB ~= 1Gb, 10MB ~= 100Mb.  Disk and disk interface
> speeds are mostly measured in MB (FC excepted) network
> speeds are mostly measured in Mb.
>
>
> >
> >
> > Steve Sills
> > Platnum Computers, President
> > http://www.platnum.com
> > steve at platnum.com
> >
> > ----- Original Message ----- 
> > From: "jw schultz" <jw at pegasys.ws>
> > To: <rsync at lists.samba.org>
> > Sent: Thursday, January 22, 2004 1:42 PM
> > Subject: Re: Rsync's Speed
> >
> >
> > > On Thu, Jan 22, 2004 at 01:36:05PM -0700, Steve Sills wrote:
> > > > Well, it is running under SSH, that could slow it down i guess....
> > >
> > > Very easy to tell.  If ssh is burning user-mode cpu time the
> > > encryption is a factor.
> > >
> > > It is very unlikely the encryption is having any affect on
> > > throughput.  Unless you are on very old hardware the network
> > > is slower than the CPU and for rsync the disk latency likely
> > > makes it slower than the 10MBps network.
> > >
> > > >
> > > > Steve Sills
> > > > Platnum Computers, President
> > > > http://www.platnum.com
> > > > steve at platnum.com
> > > >
> > > > ----- Original Message ----- 
> > > > From: "Streubert, Christoph" <Christoph.Streubert at disney.com>
> > > > To: "Chuck Wolber" <chuckw at quantumlinux.com>; "Steve Sills"
> > > > <steve at platnum.com>
> > > > Cc: <rsync at lists.samba.org>
> > > > Sent: Thursday, January 22, 2004 12:52 PM
> > > > Subject: RE: Rsync's Speed
> > > >
> > > >
> > > > I do not know the details of your syntax - however in case you use
it -
> > > > encryption adds a lot of overhead to the transfer process. After I
> > > > turned off encryption (internal network with uncritical data) speeds
> > > > increased dramatically.
> > > >
> > > > C
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Chuck Wolber [mailto:chuckw at quantumlinux.com]
> > > > Sent: Thursday, January 22, 2004 10:30 AM
> > > > To: Steve Sills
> > > > Cc: rsync at lists.samba.org
> > > > Subject: Re: Rsync's Speed
> > > >
> > > >
> > > >
> > > >
> > > > > During my initial download for my home directory backup, it took
rsync
> > > >
> > > > > over 6 hours to do the initial backup, but I can FTP the stuff in
> > > > > about 30 Mins.  Is Rsync usualy this slow? I have compression
turned
> > > > > on, and its across a 100 MB/S network, Anyone had this problem
before?
> > > >
> > > > In this case, I believe compression is actually slowing you down.
> > > >
> > > > -Chuck
> > > >
> > > >
> > > > -- 
> > > > http://www.quantumlinux.com
> > > >  Quantum Linux Laboratories, LLC.
> > > >  ACCELERATING Business with Open Technology
> > > >
> > > >  "The measure of the restoration lies in the extent to which we
apply
> > > >   social values more noble than mere monetary profit." - FDR
> > > > -- 
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> > >
> > > -- 
> > > ________________________________________________________________
> > > J.W. Schultz            Pegasystems Technologies
> > > email address: jw at pegasys.ws
> > >
> > > Remember Cernan and Schmitt
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> >
> >
>
> -- 
> ________________________________________________________________
> J.W. Schultz            Pegasystems Technologies
> email address: jw at pegasys.ws
>
> Remember Cernan and Schmitt
>
>