John Reiser <jreiser@xxxxxxxxxxxx> wrote: > On 04/09/2012 07:18 PM, Dan Mashal wrote: > > As I said in the meeting let's just deprecate it [in favor of yum+network]. > > The problems I have seen with using only yum+network to perform a distro > version upgrade are: [...] > 2. yum is stupidly slow about collecting the upgrade .rpms. > First there is downloading itself: yum downloading [of any kind] > is single threaded. Often this wastes 30% to 50% of available > bandwidth (at the server and/or in the pipe.) > A close-to-optimal strategy for typical cable modem ISP is: > 1. Sort the download list by size of file to be downloaded. > 2. Run two parallel threads. The first thread downloads > from large to small, the second from small to large. > Stop when the threads meet somewhere in the "middle". I don't understand why this should be better than each thread just getting the next available one. > [Debian has a two-thread download for "apt upgrade". It does not > use the optimal strategy, but it is still effective.] > > Second, yum does not download the remaining .rpm (whose .drpm > are not available) while it is reconstituting the other .rpm > from .drpm. The waste can be significant for the common case > when there are enough .drpm for some large .rpms (kernel, > libreoffice-*, etc.) All this is purely a yum problem, fixing that would go a long way to making regular updates smoother. -- Dr. Horst H. von Brand User #22616 counter.li.org Departamento de Informatica Fono: +56 32 2654431 Universidad Tecnica Federico Santa Maria +56 32 2654239 Casilla 110-V, Valparaiso, Chile 2340000 Fax: +56 32 2797513 -- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test
