On Mar 04, 2002 00:32 -0500, Chris Mason wrote: > Ok, I'm not going to be able to replicate the entire test, but I can > at least demonstrate the high number of subdirectories is slowing down > the creation time. I'm guessing it is either caused by the > subdirectory inodes not being in cache often enough, or increased > log traffic. > > Try setting the number of subdirectories to 10. If this fixes the > reiserfs performance problem, we can look into solutions.
Hmm, interesting. When Andrew was doing MTA performance testing on ext3, he found that _increasing_ the number of directories improved performance. I don't have the thread handy, but I _think_ it had to do with VFS locking on the directories - more directories means that more operations can be done in parallel since Al made this part of the VFS thread-safe. Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/
