[Udpcast] udpcast gzip and lzop

Thomas Kuehling thomas.kuehling at mapsolute.com
Tue Dec 27 16:35:39 CET 2005


On Wed, 2005-12-28 at 01:22 +1000, Michael D. Setzer II wrote:
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> Not sure it will help, but G4L is designed to make compressed images to an 
> ftp server, and these images can then be used with udpcast. It basically 
> uses dd lzop or gzip and ncftp. Might be worthing seeing if it can create an 
> image that could work for your setup. 

I know and i used it for creating the images. But to mirror them on the
machines after that was impossible due TimeOuts.

> On 27 Dec 2005 at 16:04, Thomas Kuehling wrote:
> 
> Subject:        	Re: [Udpcast] udpcast gzip and lzop
> From:           	Thomas Kuehling <thomas.kuehling at mapsolute.com>
> To:             	Pierre CANAL <pierre.canal at gmail.com>
> Organization:   	Mapsolute GmbH
> Date sent:      	Tue, 27 Dec 2005 16:04:26 +0100
> Copies to:      	udpcast at udpcast.linux.lu
> Send reply to:  	thomas.kuehling at mapsolute.com
> 	<mailto:udpcast-request at udpcast.linux.lu?subject=unsubscribe>
> 	<mailto:udpcast-request at udpcast.linux.lu?subject=subscribe>
> 
> > Hi Pierre,
> > 
> > On Tue, 2005-12-27 at 12:25 +0100, Pierre CANAL wrote:
> > > Hello,
> > > 
> > > I use udpcast for test. I make and image of /home with or without
> > > compression perfectly.
> > > But when I want to send image , if there is no compression it's Ok
> > > (some timeout notAnswered[0]...but finally it's ok)
> > > When  I use lzop or gzip, I get an error sometimes on the sender,
> > > sometimes on the sender :
> > > I have a lot of
> > > Timeout notAnswered=[0} notReady=[0] nrAns=0 nrReady=0 nrPart=1
> > > avg=8121 and so on...
> > > 
> > > Dropping client because of timeout lzop <stdin> checksum error...
> > > or invalid operand PREEMPT and crash server ! process udp-sender
> > > Stack ... Call Trace ...
> > > or Gzip stop Bad EIPvalue SIGSEGV ....
> > > And strange thing ..
> > > With no compression the speed is 80Mbps
> > > with lzop 20 Mbps
> > > with gzip 7Mbps
> > 
> > i had the same problem and if i used a "server" to save the images and
> > use udp-sender with lzop or gzip, i got allways a timeout and the copy
> > fails. The performace with gzip was worst and with lzop much better,
> > too.
> > 
> > My main problem is, that it is actually impossibile, to save images on a
> > server and copy them on a machine. I am still searching for a
> > solution. :-( 
> > 
> > > My CPU is an Athlon 2400+ (not so bad), I use kernel 2.6.8 on a Debian
> > > Sarge.
> > 
> > I used a Pentium IV 2,4 with 1 GB RAM in the server and fast S-ATA
> > drives.
> > 
> > Regards
> > Thomas Kuehling
> > -- 
> > Mapsolute Gmbh - Techn. Administration - TK2325-RIPE
> > Düsseldorfer Straße 40a - 65760 Eschborn/Frankfurt a.M. - Germany 
> > Phone: +49 6196 777 56 413 - Fax: +49 6196 777 56 100 
> > E-Mail: thomas.kuehling at mapsolute.com - web: http://www.mapsolute.com
> > 
> > _______________________________________________
> > Udpcast mailing list
> > Udpcast at udpcast.linux.lu
> > https://lll.lgl.lu/mailman/listinfo/udpcast
> > 
> 
> 
> +----------------------------------------------------------+
>   Michael D. Setzer II -  Computer Science Instructor      
>   Guam Community College  Computer Center                  
>   mailto:mikes at kuentos.guam.net                            
>   mailto:msetzerii at gmail.com
>   http://www.guam.net/home/mikes
>   Guam - Where America's Day Begins                        
> +----------------------------------------------------------+
> 
> http://setiathome.berkeley.edu
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> 
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-- 
Mapsolute Gmbh - Techn. Administration - TK2325-RIPE
Düsseldorfer Straße 40a - 65760 Eschborn/Frankfurt a.M. - Germany 
Phone: +49 6196 777 56 413 - Fax: +49 6196 777 56 100 
E-Mail: thomas.kuehling at mapsolute.com - web: http://www.mapsolute.com




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