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udpcast@udpcast.linux.lu

March 2003

4 participants
2 discussions

Re: Udpcast Alternative Boot Disks
by Andrew Cooks 04 Apr '03

04 Apr '03

Hi Mike & everyone on udpcast I fiddled with my new bootdisks again today. I can now get about 93.6Mb/s on a switched 100Mb/s network. As you said, the main limiting factor lies in how quickly the receiver can write the data to disk. I tried using compression, but that made it slower, so I decided to use hdparm to set the disk: "hdparm -c1 -d1 /dev/hda". This made a _huge_ difference! My next step is to recompile everything on my boot disk, using ulibc. Then there should be enough space to include a compression program on the boot disks, without using higher densities. I expect this should make quite a difference as well, seeing as the cpu is now free to do this kind of thing. I'm just not sure whether it's really possible to compress data fast enough. Gzip is not fast enough on the hardware I have. It would have to be faster than 95Mb/s to be of benefit in this situation. I'll make my disk images and sources available on http://tlug.up.ac.za/downloads.html asap. Cheers Andrew On Tue, 11 Mar 2003, Mike McCall wrote: > Andrew, > > I would love a copy of both the sender and the receiver disks! As you might > have noticed from some of my posts to the list, the off-the-shelf disks > don't work for a couple of our PCs due to a funky bios. Just let me know > how to get the files! Thanks! > > As for udpcast printing stuff to the screen, when I have used both > statically compiled binaries and the boot disks, there is a LARGE amount of > printing on the screen for the sender, and an activity status (transfer > rate) on the receiver. You might want to make sure the binaries compiled > successfully. If you want to try the binaries I have, I can send them to > you. > > By the way, does your boot disk have hdparm on it? I have noticed that the > receivers can't keep up on a high speed connection without it. > > Thanks again! > > Mike McCall > Computer Technician > Rio Rancho Public Schools > > ----------------------- Andrew Cooks TechTeam TechTeam -- "We make it work." Computer Science dept. University of Pretoria ----------------------- "I don't make jokes in base 13. Anyone who does should get help." -Douglas Adams

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alternative boot disks
by Andrew Cooks 11 Mar '03

11 Mar '03

Hi I built a custom boot disk with a 2.4.20 kernel, dhcpcd and 3c59x and eepro100 support and just the receiver, it fits on a standard 1.44MB floppy. There is also a sender available with the same specs. Anyone interested? I'm also having a little problem. I'm not sure if anything is actually happening, because neither sender nor receiver prints anything to screen after "press any key to start" and the subsequent keypress. One last thing: Is udpcast still in active development? Andrew ----------------------- Andrew Cooks TechTeam TechTeam -- "We make it work." Computer Science dept. University of Pretoria ----------------------- "I don't make jokes in base 13. Anyone who does should get help." -Douglas Adams

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