Udpcast November 2005

udpcast@udpcast.linux.lu

6 participants
8 discussions

UDPCast source code issues...
by Saikrishna Dasari 25 Apr '06

25 Apr '06

Hi Alain, I was studying the UDPCast source code for some experimental purposes. I have the following question. 1. The whole data to be transfered into is divided into slices which again contains a series of blocks to transfer. Can we consider the whole data to be transfered as a single slice ( By setting appropriate parameters in code) and what kind of performance issues we can expect if we do a change of this kind at code level. Thanks in advance, Sai --------------------------------- Do you Yahoo!? Y! Messenger - Communicate in real time. Download now.

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Buggy tg3 ethernet
by Donald Teed 04 Apr '06

04 Apr '06

The option of ipappend 1 in the default file and retransmission of HELLOs in udp-sender (--rexmit-hello-interval) has been valuable to getting udpcast working with the Dell notebooks we have with Broadcom 5700 series ethernet. Today, with a slightly newer broadcom chipset appearing in the most recent shipment, we noticed that udp-receiver was intermittantly not showing the "hit any button to start transfer" message. With some trial and error I found that if I watched the tail of /var/log/message on the receiver (server) and waited for the messages on TX and RX flow control to complete before running udp-receiver, it would always initiate a good connection. If I had started the udp-receiver prior to the TX/RX flow control appearing in the message log (in which case there was no "hit any key" message), I could ^C the receiver, run it again and it would signify the ready state with 100% success. In conclusion, we have a workaround of starting udp-receiver after a few seconds past the client PXE machine booting and showing the udp-sender status ready (but not yet "hit any key..."). Another solution would be if udp-receiver also supported --rexmit-hello-interval. It isn't a flaw in the udpcast system but a kludge for a network device that is proving itself to be sluggish in initialization in general. --Donald Teed

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Default boot not recognizing kb
by abarkley＠jamadots.com 04 Apr '06

04 Apr '06

I downloaded your CD image and it worked fine until I used it on a pc with a USB keyboard. These PCs are in the lab I am trying the program on. Do I need to compile my own image using my own kernal? I am using debian 3.1 and cannot find the required files as specified by the -k switch. Please, let me know what I need to do. Thanks, AJ

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Re: [Udpcast] UDPCast on OSX
by Jeff Michels 05 Dec '05

05 Dec '05

Hello Donald, Thank you for your reply. Here is the output I get: cc -Wall -Wshadow -DBB_FEATURE_UDPCAST_FEC -D_FILE_OFFSET_BITS=64 -DUSE_SYSLOG -DNO_BB -c -o socklib.o socklib.c socklib.c: In function 'udpc_getSendBuf': socklib.c:280: warning: pointer targets in passing argument 5 of 'getsockopt' differ in signedness socklib.c: In function 'udpc_getRcvBuf': socklib.c:293: warning: pointer targets in passing argument 5 of 'getsockopt' differ in signedness socklib.c: In function 'udpc_setTtl': socklib.c:323: error: 'SOL_IP' undeclared (first use in this function) socklib.c:323: error: (Each undeclared identifier is reported only once socklib.c:323: error: for each function it appears in.) socklib.c: In function 'mcastOp': socklib.c:368: error: 'SOL_IP' undeclared (first use in this function) make: *** [socklib.o] Error 1 Thank you for your help, Jeffrey Michels >>> D Teed <dteed(a)artistic.ca> 09/14/05 9:18 PM >>> I suggest posting the actual error you got when you tried to make the udpcast binaries. It could be an ordinary dependancy or lib you don't have. Usually the last 6 to 10 lines from a make error tell the tale of what went wrong. I've built udpcast on Sun with Linux, so I don't think there is anything x86 centric about it. --Donald Teed On Wed, 14 Sep 2005, Jeff Michels wrote: > Hello, > > I've been using UDPCast for about a year now and it has saved our school > district from the cost of a commercial imaging program. I has also > saved me many hours. For that I am grateful. > > Our district just purchased two Apple Servers. Currently I am using a > 500 Mhz PIII box running Debian as our main image server. It has been > extermely reliable and UDPCast works great however disk I / O and > processing limitations are showing. > > I would like to compile UDPCast for OSX. I have a Powerbook with 10.4 > and the 2.1 Developer tools installed. I have tried to compile but was > unsucessful. I have very limited coding skills so here is the > information I need: > > 1. What do I need to do to get UDPCast to compile on OSX. If a total > rewrite is needed, I will to lobby for a new(er) x86 box. > > 2. If anyone has done this I would like to read your experience. > > Thank you in advance for your help. > > Regards, > > Jeff Michels > School District of Beloit > Technology Support Specialist > _______________________________________________ > Udpcast mailing list > Udpcast(a)udpcast.linux.lu > https://lll.lgl.lu/mailman/listinfo/udpcast >

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How to do an automatic reboot
by david aimé 05 Dec '05

05 Dec '05

Hello I use udpcast with several computers. After duplicating one hard disk to the others, i would like that the computers that received the data reboot automatically. But i don't know how to do this because udpcast don't allow us to do that with it's options. I'm waiting for your advice Aimé David _________________________________________________________________ MSN Messenger : personnalisez votre messagerie instantanée ! http://g.msn.fr/FR1001/866

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udp-receiver portbase problem
by Raúl Sánchez Sánchez 05 Dec '05

05 Dec '05

Hello: I'm trying to use udp-receiver with a inirrd (PXE) image from your web with the portbase option. The client is configured to use port the 9600. When I launch udp-sender --portbase 9600 option no client listen it. However if I use the default port, it works fine. So clients are listening at port 9000 instead of 9600 how I wanted :( What I'm doing wrong? Regards -- ----------------------------------------------- Raúl Sánchez Sánchez raul(a)um.es Centro de Calculo raul(a)dif.um.es Facultad de Informática Tlf: +34 968 36 4827 Universidad de Murcia Fax: +34 968 36 4151 -----------------------------------------------

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Difference between udpcast.iso and udpcast26.img
by Octavio Alvarez 29 Nov '05

29 Nov '05

Hi. What's the difference between http://udpcast.linux.lu/current/udpcd.iso and http://udpcast.linux.lu/current/udpcd26.img? Thanks. -- Ing. Octavio Alvarez Piza, Jefe de Informática, TBC Universidad. Tel.: +52 (664) 621-7111 ext. 133; E-mail: alvarezp(a)tecbc.net

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No success with imaging XP
by Paul Creelman 02 Nov '05

02 Nov '05

I would like to use an external, partitioned 250 GB HD to image 3 separate XP computers each 30 GB in size. How do I do this so that if any one of the 3 computers' HD died, I could immediately copy the image for that computer back to a new HD from the corresponding partition of the external HD so I wouldn't have to go through the laborious setup process of installing several of programs. As I understand it Acronis and Norton Ghost will not allow copying an image to a partitioned external drive - they demand using only one partition on the external drive - thus 1 backup max per external HD. Thanks Paul Creelman

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Udpcast November 2005