Messages in this thread | | | Date | Thu, 27 Feb 2003 09:31:03 -0800 | From | "Martin J. Bligh" <> | Subject | [Bug 417] New: htree much slower than regular ext3 |
| |
http://bugme.osdl.org/show_bug.cgi?id=417
Summary: htree much slower than regular ext3 Kernel Version: 2.5.63-bk3 Status: NEW Severity: normal Owner: akpm@digeo.com Submitter: bwindle-kbt@fint.org
Distribution: Debian Testing
Hardware Environment: x86, 256mb RAM, PIIX4, Maxtor 91728D8 ATA DISK drive
Software Environment: Linux razor 2.5.63bk3 #25 Thu Feb 27 10:13:35 EST 2003 i686 Pentium II (Klamath) GenuineIntel GNU/Linux
Gnu C 2.95.4 Gnu make 3.79.1 util-linux 2.11n mount 2.11n module-init-tools implemented e2fsprogs 1.30-WIP reiserfsprogs 3.6.3 Linux C Library 2.2.5 Dynamic linker (ldd) 2.2.5 Procps 2.0.7 Net-tools 1.60 Console-tools 0.2.3 Sh-utils 4.5.2
Problem Description: I created a directory ("test") with 32000 (ok, 31998) directories in it, and put a file called 'foo' in each of them (for i in `ls`; do cd $i && touch bar && cd .. ; done). Then I took that ext3 partion, umounted it, did a 'tune2fs -O dir_index', then 'fsck -fD', and remounted. I then did a 'time du -hs' on the test directory, and here are the results.
ext3+htree: bwindle@razor:/giant/inodes$ time du -hs 126M .
real 7m21.756s user 0m2.021s sys 0m22.190s
I then unmounted, tune2fs -O ^dir_index, e2fsck -fD /dev/hdb1, remounted, and did another du -hs on the test directory. It took 1 minute, 48 seconds.
bwindle@razor:/giant/test$ time du -hs 126M .
real 1m48.760s user 0m1.986s sys 0m21.563s
I thought htree was supposed to speed up access with large numbers of directories?
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |