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Semi-Scientific Filesystem Comparison
January 12th, 2010 at 6:34 PM
System: Dual Pentium III (Coppermine) @ 1000 MHz / 133 MHz FSB, 2 GiB ECC SDRAM. Linux 2.6.32-ARCH.
Disks: four 10,000 RPM UltraSCSI 320 disks in RAID5 (hardware accelerated). Max read speed: ~50 MB/s. Max write speed: ~35 MB/s
Setup: filesystems created on a 10 GiB (10737418240 bytes) zero-filled file, mounted via loop device.

Test 1: unpack an uncompressed tar archive of the Chromium browser source code at revision 35890 (2.6 GiB, 222964 files) to the test filesystem.
Test 2: delete all files created in test 1.

(Note: CPU usage is out of 200%, and the loop device and tar command make up a large part of it)

JFS Test 1: 3:25.85, 32% CPU
JFS Test 2: 0:22.38, 64% CPU

XFS Test 1: 4:22.26, 43% CPU
XFS Test 2: 1:16.31, 89% CPU

Ext4 Test 1: 3:28.61, 28% CPU
Ext4 Test 2: 0:24.12, 72% CPU

ReiserFS Test 1: 4:28.20, 39% CPU
ReiserFS Test 2: 0:33.93, 91% CPU

So, JFS wins this one, which is good, because that's what filesystem I'm already using. :)

Test procedure: 
% dd if=/dev/zero of=test_disk bs=1G count=10
% sudo losetup /dev/loop0 test_disk
% sudo mkfs.jfs /dev/loop0
% sudo mount /dev/loop0 testmnt
% sudo chown wrf:wrf testmnt
% cd testmnt
% time tar xf ../chromium-r35890.tar
% time rm -rf *
% cd ..
% sudo umount testmnt
(repeat from mkfs step with different filesystem)
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