Udpcast November 2011

udpcast@udpcast.linux.lu

2 participants
3 discussions

exit code not passed if rx pipe fails
by George Coulouris 25 Apr '12

25 Apr '12

Hello, If udp-receiver is writing to a pipe and the pipe fails, udp-receiver will incorrectly exit with a returncode of zero. This is easily tested with a trivial pipe program that copies stdin to stdout, but exits with a nonzero status upon encountering eof. Adding the following to startReceiver() in udpr-negotiate.c is sufficient to fix this behavior: <---- cut here int ret; ... if(pipePid) { ret=udpc_waitForProcess(pipePid, "Pipe"); } ... return ret; <---- cut here Regards, George Coulouris National Center for Biotechnology Information (contractor)

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Re: [Udpcast] udp-receiver and gzip SLOW
by Raul Sanchez 30 Nov '11

30 Nov '11

Hi: I have been testing this days g4l and other options and I think that the difference between old udpcast and new udpcast is that --nosync was a default option ( with -p 'gzip -dc') and now it is not. If I force --nosync it works ok with new kernels, so it is possible that the were at the kernel. I'm cloning machine now at 80Mb/s. For me, it's ok thank you for all El sáb, 26-11-2011 a las 09:40 +1000, Michael D. Setzer II escribió: > I maintain the g4l disk imaging project that includes udpcast as > options, and on some occassions it has kernel support for > hardware that the website does yet support. > > The latest version I have is > > ftp://amd64gcc.dyndns.org/g4l0.39alpha/g4l-v0.39alpha30.iso > > but the sourceforge site has the latest release version. > Generally, I use the lzop compression as default, since it is about > twice as fast as gzip, but does make a 10% larger image. > > I haven't done a lot using PXE with the g4l, but have just copied > one of the kernel files and the ramdisk.lzma file and set it up using > PXE or Grub or Grub4DOS. > > If you do try it, I would like to know if the hardware is seen and > works with the g4l.. > > Good Luck. > > > On 25 Nov 2011 at 11:41, Raul Sanchez wrote: > > From: Raul Sanchez <raul(a)um.es> > To: udpcast(a)udpcast.linux.lu > Date sent: Fri, 25 Nov 2011 11:41:58 +0100 > Subject: [Udpcast] udp-receiver and gzip SLOW > > > Hello: > > > > I'm using udpcast for years and any problem has occurs to me. > > > > Now we have bought new pcs and i wan't to use pxe + udpcast to clone > > them. I have 2 differents types of network card and the others pieces > > of the pcs are the same. The only different is the network chip > > (AR8131 and AR8151) > > > > I have my image un gzip mode and... I have made this tests > > > > 1. cast'o matcic kernel 2009 november. Works fine in AR8131. kernel > > module (atl1c doesn't work with AR8151). (udp-receiver --file /dev/sda > > -p 'gzip -dc') 2. Cast'o matic. Kernel 2.6.39.3. Works VERY SLOW using > > gzip in AR8131 and AR8151. (udp-receiver --file /dev/sda -p 'gzip > > -dc'). But works quick with udp-receiver --file /dev/sda without gzip > > 3. Boot with ubuntu 11.10 live cd. apt-get install udpcast. > > udp-receiver --file /dev/sda -p 'gzip -dc' works fine so... 4. Install > > makeImage in ubuntu 11.10. make initrd with modules and ... pxe + > > initrd (11.10) + kernel 3.0.0-12 (and 13 too). same kernel and modules > > than Ubuntu 11.10.udp-receiver --file /dev/sda -p 'gzip -dc' very slow > > again. udp-receiver --file /dev/sda works fine 5. Same than 4, but > > compiling busybox 1.18.5 and 1.19.xx and same result. Slow with gzip > > 6. ubuntu kernel + makeinitramfs + copy same libraries + copy busybox > > (ubuntu 11.10) + copy udpcast (ubuntu 11.10 apt install) + copy gzip > > (ubuntu 11.10). Same result. Slow with gzip 7. I have probe with > > diverse versions of udp-receiver and udp-sender and the same result > > (slow with gzip) 8. If you probe that cases with --nosync in > > udp-receiver and gzip it works but when it have spent about 10 Gb, > > computer reboots > > > > So ... when you use old kernel and modules and network card is > > supported it works fine. > > > > New kernels and modules fails with gzip compression. > > > > I have found that with 'ps' in pxe boots you can see several instances > > of udp-receiver but in live cd you only see one. It can be by the way > > ps show information. And I have boot appending maxcpus=1 option to the > > kernel and the result has been the same. > > > > In all cases network cards is working at 100Mbps > > > > It seems that livecd after make the 'pivotroot' start any service or > > "anything" that increases hard drive performance. > > > > > > It will be nice any idea. > > > > Thank you very much > > > > Regards > > > > > > > > > > > > > > _______________________________________________ > > Udpcast mailing list > > Udpcast(a)udpcast.linux.lu > > https://udpcast.linux.lu/cgi-bin/mailman/listinfo/udpcast > > > +----------------------------------------------------------+ > Michael D. Setzer II - Computer Science Instructor > Guam Community College Computer Center > mailto:mikes@kuentos.guam.net > mailto:msetzerii@gmail.com > http://www.guam.net/home/mikes > Guam - Where America's Day Begins > G4L Disk Imaging Project maintainer > http://sourceforge.net/projects/g4l/ > +----------------------------------------------------------+ > > 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@HOME CREDITS > SETI 11466027.143632 | EINSTEIN 6907565.249851 > ROSETTA 3963112.556472 | ABC 9455189.531355 >

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udp-receiver and gzip SLOW
by Raul Sanchez 25 Nov '11

25 Nov '11

Hello: I'm using udpcast for years and any problem has occurs to me. Now we have bought new pcs and i wan't to use pxe + udpcast to clone them. I have 2 differents types of network card and the others pieces of the pcs are the same. The only different is the network chip (AR8131 and AR8151) I have my image un gzip mode and... I have made this tests 1. cast'o matcic kernel 2009 november. Works fine in AR8131. kernel module (atl1c doesn't work with AR8151). (udp-receiver --file /dev/sda -p 'gzip -dc') 2. Cast'o matic. Kernel 2.6.39.3. Works VERY SLOW using gzip in AR8131 and AR8151. (udp-receiver --file /dev/sda -p 'gzip -dc'). But works quick with udp-receiver --file /dev/sda without gzip 3. Boot with ubuntu 11.10 live cd. apt-get install udpcast. udp-receiver --file /dev/sda -p 'gzip -dc' works fine so... 4. Install makeImage in ubuntu 11.10. make initrd with modules and ... pxe + initrd (11.10) + kernel 3.0.0-12 (and 13 too). same kernel and modules than Ubuntu 11.10.udp-receiver --file /dev/sda -p 'gzip -dc' very slow again. udp-receiver --file /dev/sda works fine 5. Same than 4, but compiling busybox 1.18.5 and 1.19.xx and same result. Slow with gzip 6. ubuntu kernel + makeinitramfs + copy same libraries + copy busybox (ubuntu 11.10) + copy udpcast (ubuntu 11.10 apt install) + copy gzip (ubuntu 11.10). Same result. Slow with gzip 7. I have probe with diverse versions of udp-receiver and udp-sender and the same result (slow with gzip) 8. If you probe that cases with --nosync in udp-receiver and gzip it works but when it have spent about 10 Gb, computer reboots So ... when you use old kernel and modules and network card is supported it works fine. New kernels and modules fails with gzip compression. I have found that with 'ps' in pxe boots you can see several instances of udp-receiver but in live cd you only see one. It can be by the way ps show information. And I have boot appending maxcpus=1 option to the kernel and the result has been the same. In all cases network cards is working at 100Mbps It seems that livecd after make the 'pivotroot' start any service or "anything" that increases hard drive performance. It will be nice any idea. Thank you very much Regards

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Udpcast November 2011