On 04/09/2012 10:05 PM, Dan Mashal top-posted: > 1) Yum should be intelligent enough to recognize this > > 2) yum-plugin-fastestmirror solves this problem. > > 3) I think we all upgraded from 14.4k modems a few years ago. Replying in "top post" style may work for a management discussion, but for a technical discussion it is better for the replies to follow the quoted relevant sections [trimmed as appropriate]. Then it is easier to associate the specific points, and a top-to-bottom reading corresponds to chronological order for each point, which makes the discussion easier to follow. >> 1. ... Thus single user mode should >> be considered a requirement for distro version upgrade via yum+network, > 1) Yum should be intelligent enough to recognize this Until yum is enhanced, preupgrade provides a valuable service: helping to minimize downtime and avoid silly mistakes. >> 2. yum is stupidly slow about collecting the upgrade .rpms. >> First there is downloading itself: yum downloading [of any kind] >> is single threaded. ... >> Second, yum does not download the remaining .rpm (whose .drpm >> are not available) while it is reconstituting the other .rpm ... > 2) yum-plugin-fastestmirror solves this problem. Are you sure? The documentation http://wiki.centos.org/PackageManagement/Yum/FastestMirror does not mention multi-threaded downloading. It claims only to rate the available mirrors (and does not specify whether by latency or [near-]peak throughput), then just give an ordered list to yum. Single-threaded downloading from the "fastest" mirror often takes longer to finish the whole job [distro upgrade often involves hundreds of files] than double-threaded downloading from a mirror with less single-threaded throughput, because of latency in setup/teardown [thus loss of average data throughput] for each file. Also, choice of mirror has no influence on yum's strategy of not downloading while finishing with the .drpm after the first batch of downloads. >> 3. If distro version upgrade via yum+network fails (power failure, >> network failure, configuration failure, operator error, ...), >> then you have a big mess. > 3) I think we all upgraded from 14.4k modems a few years ago. Get serious. Downloading for distro version upgrade can take half an hour even on a 10Mbit/s to 20Mbit/s cable modem. That's plenty of time for disaster. Reliability and Usability (including short and easy cleanup after disaster, interruptions, or mistakes) are important considerations for users. -- -- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test
