On Fri, Mar 28, 2008 at 09:05:37PM -0600, dan wrote: > unfortunately, ionice has only 3 levels. awesome, regular, and crappy. if > you just push down the backuppc io process then EVERYTHING will pre-empt the > IO, if you up it, it will consume every drop of blood from the system! > > note, you should NEVER ionice a heavy IO process such as backuppc to -c1, > the backup will take all the IO priority and you could litterally not be > able to log in or run any programs because the shell wont be able to get > enough IO time to search $PATH for commands or read .profile,.bashrc, etc > etc to get a user logged in.
Right, but ionice has more than 3 levels since you may specify a priority within "best effort" and "real time" scheduling classes. That is, IO priorities will be: 1. real time scheduling class, priority 0 2. real time scheduling class, priority 1 ... 8. best effort scheduling class (default), priority 0 9. best effort scheduling class (default), priority 1 ... 13. best effort scheduling class (default), priority 4 (default) ... 16. idle scheduling class, no priorities there That's at least what my man page says. HTH, Tino. PS: You need the CFQ scheduler for this to work, so you need at least kernel 2.6.13. -- www.craniosacralzentrum.de www.spiritualdesign-chemnitz.de www.forteego.de Tino Schwarze * Lortzingstraße 21 * 09119 Chemnitz ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
