Fw: Rsync's Speed

Steve Sills steve at platnum.com
Thu Jan 22 20:52:48 GMT 2004


Steve Sills
Platnum Computers, President
http://www.platnum.com
steve at platnum.com
----- Original Message ----- 
From: "Steve Sills" <steve at platnum.com>
To: "jw schultz" <jw at pegasys.ws>
Sent: Thursday, January 22, 2004 1:52 PM
Subject: Re: Rsync's Speed


> 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.
>
>
> 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
> > > -- 
> > > To unsubscribe or change options:
> > > http://lists.samba.org/mailman/listinfo/rsync
> > > Before posting, read:
http://www.catb.org/~esr/faqs/smart-questions.html
> > >
> > >
> > >
> > > -- 
> > > To unsubscribe or change options:
> http://lists.samba.org/mailman/listinfo/rsync
> > > Before posting, read:
http://www.catb.org/~esr/faqs/smart-questions.html
> > >
> >
> > -- 
> > ________________________________________________________________
> > J.W. Schultz            Pegasystems Technologies
> > email address: jw at pegasys.ws
> >
> > Remember Cernan and Schmitt
> > -- 
> > To unsubscribe or change options:
> http://lists.samba.org/mailman/listinfo/rsync
> > Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
> >
> >
>




More information about the rsync mailing list