** Description changed: + [Impact] The netboot installer is unreasonably slow to deduplicate udeb Packages files retrieved from the network, scaling (at least) quadratically in the number of packages with a bad constant factor. + [Test Case] Run a netboot installer built with the new net-retriever (we'll put one in -proposed at some point after this SRU is reviewed and accepted, and post the URLs to this bug). It should work and should not take unreasonable time around the "Download installer components" stage. + [Regression Potential] Cannot affect anything other than netboot installations. I've compared the output against the old code for a sample Packages file provided by Michael and made sure it's identical; but if this goes wrong then the most likely result is a partitioning failure, or perhaps a complaint that no suitable kernel versions are available (although this can happen for other reasons, e.g. forgetting "apt-setup/proposed=true" for an image built against the kernel in -proposed). + + Original report follows; + At some point after Lucid's initial release, the ubuntu alternate installer seems to stall for a very long time (10+ minutes) before the partitioning menu comes up. I don't think it was happening for the first year or so after Lucid's release, but I'm not real clear on when it started happening (it was only recently brought to my attention). I think it is happening in /usr/lib/debian-installer/net-retriever's deduplicate function... When it is stalled out, it keeps adding content to /tmp/net-retriever-NNNN-deduplicate/, eventually it moves on, but it takes forever. The speed of the install machine doesn't appear to matter much. There's nothing obvious in the log as to why it's stalling at that point... I thought it might be some issue with our preseeding, but it appears to happen on an install without preseeding as well. Newer versions of Ubuntu (at least Xubuntu 12.04) don't seem to experience this problem, as far as I can tell. We're using the netboot installer, apparently last updated on 2011-04-29: 2011-04-29 03:32:27-07:00 checking for updates: http://us.archive.ubuntu.com/ubuntu/dists/lucid/main/installer-i386/current/images/netboot/netboot.tar.gz 2011-04-29 03:33:13-07:00 updated: /var/lib/tftpboot/ubuntu-installer/lucid.i386.netboot.tar.gz though as far as i can tell, that file hasn't been updated on the mirrors since 2010-04-25. live well, - vagrant + vagrant
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1067934 Title: spends 10+ minutes deduplicating Package lists To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/net-retriever/+bug/1067934/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
