On Fri, Apr 08, 2005 at 11:56:09AM -0700, Chris Wedgwood wrote: > On Fri, Apr 08, 2005 at 11:47:10AM -0700, Linus Torvalds wrote: > > > Don't use NFS for development. It sucks for BK too. > > Some times NFS is unavoidable. > > In the best case (see previous email wrt to only stat'ing the parent > directories when you can) for a current kernel though you can get away > with 894 stats --- over NFS that would probably be tolerable. > > After claiming such an optimization is probably not worth while I'm > now thinking for network filesystems it might be.
I've just checked, it takes 5.7s to compare 2.4.29{,-hf3} over NFS (13300 files each) and 1.3s once the trees are cached locally. This is without comparing file contents, just meta-data. And it takes 19.33s to compare the file's md5 sums once the trees are cached. I don't know if there are ways to avoid some NFS operations when everything is cached. Anyway, the system does not seem much efficient on hard links, it caches the files twice :-( Willy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/