[Udpcast] multi computer cast problem

Paweł Ufnalewski // BSS archon at pjwstk.edu.pl
Wed Sep 24 11:16:33 CEST 2008


Both server (debian etch) and client (knoppix 5.1 with downloaded and
compiled new version of udpcast) don't have firewalls. Maybe it is
something with kernel version (on both server and client)? I will try
udpcast boot cd...

Michael D. Setzer II pisze:
> Just a follow up to the other reply you have already gotten. If you have a firewall running on 
> the client and servers, you need to open both the 9006 port and the 9007 ports. Not sure if 
> this would effect you. I was sending a file to many machine, and it also worked with one 
> client, but more, it didn't work. I think the transfer is done on the main port, but the clients talk 
> back to the sender machine via the next port. I also had the same switch problem, but using 
> udpcast boot cds don't have the firewall, but the Fedora systems do. 
>
>
>
> On 23 Sep 2008 at 22:05, Paweł Ufnalewski // BSS wrote:
>
> Date sent:      	Tue, 23 Sep 2008 22:05:25 +0200
> From:           	Pawe³ Ufnalewski // BSS <archon at pjwstk.edu.pl>
> To:             	udpcast at udpcast.linux.lu
> Subject:        	[Udpcast] multi computer cast problem
>
>   
>> Hello,
>>
>>     I've got problem with multicasting to many computers at once. I've
>> got server with newest udp-sender (20071228) which is sending files from
>> ext3 partition (with command  ./udp-sender --pipe 'tar -B -S -cpf - -C
>> /usr/share/systemimager/boot/i386/pjwstklenny .' --portbase 9006
>> --min-clients 2 --min-wait 15 --interface eth1 --max-bitrate 70M
>> --mcast-all-addr 234.1.1.162 --ttl 10
>>
>> and I'm trying to receive it with command:
>>
>> ./udp-receiver --portbase 9006 --nosync --ttl 10 --mcast-rdv-address
>> 234.1.1.162 --pipe "tar -f - -x -vv -C /disk"
>>
>> on client computer.
>>
>> Problem is that, when I'm doing it one-by-one (I mean server-1 client) I
>> get full speed - ~70MB/s, but when I'm trying to to this with >= 2
>> computers transfer drops to >0,5Mb/s. Why? I tried diffrent and the same
>> subnet, I'm using 3com & cisco 3-layer switches (I also tried putting
>> server and clients on the same switch - the same effect).
>>
>> Please help, cause I've got >200 computers to clone ;)
>>
>> Best regards
>>
>> Paul Ufnalewski // BSS
>> Polish Japanese Institute of Information Technology
>>
>>
>> _______________________________________________
>> 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 (Original)
> Number of Seti Units Returned:  19,471
> Processing time:  32 years, 290 days, 12 hours, 58 minutes
> (Total Hours: 287,489)
>
> BOINC at HOME CREDITS
> SETI 6,443,581.5070 | EINSTEIN 1,996,973.6209 | ROSETTA 618,619.3627
>
>   



More information about the Udpcast mailing list