[Udpcast] udpcast gzip and lzop

Michael D. Setzer II mikes at kuentos.guam.net
Tue Dec 27 16:22:03 CET 2005


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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. 

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                        
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