Udpcast July 2005

udpcast@udpcast.linux.lu

4 participants
7 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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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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Cast-o-matic PXE problem
by Bernard Chatin 12 Jul '05

12 Jul '05

/Hi everybody I used today the great online tool cast-o-matic to create a custom PXE initrd file. //I pre-configurated every option to simplify the process of image distribution (the standard initrd from the latest 2.6 kernel works fine for me). The custom initrd seems to work (all the menu & options are skipped) but after displaying the usual two lines : udp-receiver 2005-02-26 compressed UDP receiver for /dev/hda at 10.10.40.64 on eth0 the next lines (received message, cap=...) never shows up like they did with the standard initrd. When I check with the console shell I noticed that I can ping the udp-cast server and that the fdisk command shows my ide disk /dev/hda geometry. So I don't know what I missed in the configuration options (see below). I did my test on two differents IBM Thinkpad with different networks cards. The only errors I saw in the kernel startup sequence are related to missing pcmcia cardbus module (there's no option for that in cast-o-matic stage 2). My network card is on a mini-pci board anyway. / /Am I missing something (any tips will be appreciated) ? Regards. Bernard -------------------- cast-o-matic options -------------------- net modules 3c59x e100 e1000 language/keyboard Français/French network driver Autodetected network module parameters checked use dhcp yes use a disk module No Chose disk driver No preconfiguration Disk module parameters checked udpcast port 9000 device to be copied /dev/hda Additional udpcast command-line parameters checked compression Lzop transfer direction receiver /

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Re: [Udpcast] Console blanking
by Lasse Riis 05 Jul '05

05 Jul '05

Jaco Kroon wrote: > I find that libraries again have deps and have deps, so compiling > statically might be a better solution. Not sure how much space you > really save that way but it's deffinately worthwhile if it's only one > executable. > > Then again, space is only really a problem when using floppy images. Yeah I'm doing pxe-boot via gbit, so space is no issue. I statically compiled setterm to a 523 k binary (!) :) and threw it on there, and then did a setterm -b 0 in udpreceiver.pre But no luck, it doesn't work. Is it a "weird" sort of terminal that syslinux uses? Lasse

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Console blanking
by Lasse Riis 05 Jul '05

05 Jul '05

Hi The setup I'm udpcasting to is a lot of boxes with no keyboard attached. So when udpcast blanks the console after a while I have no way of following what's going on on a particular node. Of course I can always check the sender, but I'd like to have a view of all the nodes aswell. Usually I use "setterm -b 0" to achieve this. But the setterm command doesn't seem to be included in busybox. Can I add the regular command if I check it's lib-dependencies with ldd? Or do any of you know of another way to achieve this. I thought about disabling APM in the kernel maybe, that might do the trick. However I'm not sure how I compile a new kernel for UDPcast Lasse Riis

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Udpcast July 2005