Hi, Anaconda populates transaction with all required packages and invokes Yum backend. Package download and install are then done through Yum. I agree the install time and memory requirement could be lower, but it is mostly not on our side to fix. -- Martin SivÃk msivak@xxxxxxxxxx Red Hat Czech Anaconda team / Brno, CZ ----- "John Reiser" <jreiser@xxxxxxxxxxxx> wrote: > On 11/11/2010 08:19 PM, MÃirÃn Duffy wrote: > > I really want to help make our installation process an easy and > pleasant > > experience > > Anaconda takes too much time (a factor of 2 to 4) and too much RAM (a > factor of 6 or 7.) > See this Request For Enhancement (RFE) from 2002: > RFE: 2X to 6X faster install via software pipeline and controlled > memory footprint > https://bugzilla.redhat.com/show_bug.cgi?id=71184 > > In the intervening eight years the speed has improved slightly, > while the space has become worse (today: minimum 512MB, usual 1GB.) > > The same analysis still applies: pipeline the package installs for > speed, > fork+no_exec+wait most logical operations in order to control address > space. > The pipeline is (per .rpm): > 1. fetch the file, removing the outermost layer of compression as > it comes in > 2. do everything else except the %post > 3. %post [and cleanup if necessary] > Using such a pipeline, the 1193 packages for Internet Desktop (about > 3.2GB on disk, > 1.3GB on install media) could be installed in 5 minutes (32X CD or 4X > DVD, 1GHz CPU, > 384MB RAM, disk >= 20MB/s.) Only step 3 requires serialization of > predecessors > (dependent packages); otherwise arbitrary parallelism is allowed. > Even step 3 > can be parallelized over the set of all the packages that have no > remaining > predecessors at the same stage of topological sort. > > ----- > > Yesterday I timed installing Fedora 14 x86_64 using 2.0GHz > uniprocessor CPU, > 3.3GB RAM, 50MB/s harddrive, 20X DVD reader, 4X DVD+RW or 16X DVD+R > media. > I chose Custom harddrive configuration, and selected the same > pre-partitioned > 20GB slice. This is a workhorse desktop machine that is not young. > > Installing Fedora 14 x86_64 LiveCD, 685MB recorded on 4X DVD+RW: > clock > mm:ss step > ----- ----------------------- > 00:00 Autoboot in 8 seconds > 01:15 completed (f) logo on splash/progress screen > 01:55 Autologin > 02:40 click Install to harddrive > 03:05 format "/" (root) [20GB ext4] > 04:30 copying live image to harddrive > 06:15 post install > 07:45 Congratulations! [done] > ======================================= > 2.145GB on disk in 3:15 [4:30 to 7:45] ==> 11 MB/s [barely adequate > speed] > > > Installing Fedora 14 x86_64 DVD, 3.4GB recorded on 16X DVD+R; > Internet Desktop (default; 1193 packages): > clock > mm:ss step > ----- ----------------------- > 00:00 boot > 00:22 no media check > 01:03 Fedora 14 splash screen > 02:18 format "/" (root) [20GB ext4] > 02:45 check package dependencies > 03:06 transfer install image to harddrive > 03:18 starting installation process > 05:30 first package > 19:50 last package > 20:47 post install > 20:51 Congratulations! [done] 3.3GB on disk > ======================================== > 3.3GB on disk in 15:17 [5:30 to 20:47] ==> 3.6 MB/s [SLOW!] > > > Note that my timings are much different than those at: > https://fedoraproject.org/wiki/Anaconda/UX_Redesign/Current_Install_Process_Analysis > which say 15 minutes for LiveCD, 1 hour for DVD. That DVD reader > probably is > old, broken, or too cheap [is it on a laptop?]. My reader cost $25 > two years ago. > > -- > > _______________________________________________ > Anaconda-devel-list mailing list > Anaconda-devel-list@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/anaconda-devel-list _______________________________________________ Anaconda-devel-list mailing list Anaconda-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/anaconda-devel-list
