Wilko Bulte wrote: > > On Thu, Sep 27, 2001 at 02:00:26PM -0700, Julian Elischer wrote: > > 'du' keeps an array of files it has encountered that have > 1 link. > > Whenever it encounters another, it checks to see if it's one it has > > already seen > > and thus can avoid counting its space twice.. > > > > This is ok for small filesystems, however VICOR maintains > > 500GB filesystems on which much of the data has several links. > > > > The following patch to replace the linear array (which it realocs if too > > small) > > (which it scans linearly) with a hash-table can makle a DRASTIC change > > to how DU perfomrs for us in this environment. > > > > In a small test, we made a linked copy of /usr/src > > > > the run times were: > > old: 0.410u 2.221s 1:55.41 2.2% 12+1355k 6325+0io 2pf+0w > > new: 8.610u 2.665s 2:09.23 8.7% 10+718k 6367+0io 2pf+0 > > swap(old,new) I suppose?
uh.... yeah > > -- > | / o / /_ _ email: [EMAIL PROTECTED] > |/|/ / / /( (_) Bulte Arnhem, The Netherlands To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
