On Jun 18, 2003 13:55 -0400, Theodore Ts'o wrote: > The obvious thing to do is to do the tests with and without htree > enabled, and compare the results. For large files, the results should > be painfully obvious. > > This is the test I generally use for regression testing ext3: > > #!/bin/sh > dd if=/dev/zero of=test.img bs=8k count=30000 > mke2fs -j -F -b 1024 -g 1024 -N 1200000 test.img > tune2fs -O dir_index test.img > mount -t ext3 -o loop test.img /mnt > pushd /mnt > mkdir test test2 test3 > cd test > time seq -f "%06.0f" 1 100 | xargs touch > cd .. > cd test2 > time seq -f "%06.0f" 1 10000 | xargs touch > cd .. > cd test3 > time seq -f "%06.0f" 1 100000 | xargs touch > cd .. > popd > umount /mnt I think one of the earlier claims was that a test with 100 dirs x 1000 files was faster than a single htree dir with 100,000 files. Theoretically that should not be the case (extra directory access overhead, etc), but maybe in real life this is true. Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/ _______________________________________________ Ext3-users@redhat.com https://www.redhat.com/mailman/listinfo/ext3-users
