1、
不用说，
tmpfs是最快的
2、ext2
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 1.40192 seconds, 74.8 MB/s
real 0m1.414s
user 0m0.140s
sys 0m0.230s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m2.084s
user 0m0.000s
sys 0m0.310s
3、ext3
（1）data=ordered
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 1.04712 seconds, 100 MB/s
real 0m1.057s
user 0m0.090s
sys 0m0.580s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m1.429s
user 0m0.020s
sys 0m0.290s
（2）data=writeback
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 0.990267 seconds, 106 MB/s
real 0m1.004s
user 0m0.110s
sys 0m0.470s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m1.339s
user 0m0.010s
sys 0m0.250s
（3）data=journal
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 6.45851 seconds, 16.2 MB/s
real 0m6.470s
user 0m0.080s
sys 0m0.590s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m1.665s
user 0m0.010s
sys 0m0.220s
4、ReiserFS
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 1.13243 seconds, 92.6 MB/s
real 0m1.153s
user 0m0.040s
sys 0m0.620s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m1.543s
user 0m0.000s
sys 0m0.240s
5、XFS
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 1.76025 seconds, 59.6 MB/s
real 0m2.000s
user 0m0.060s
sys 0m0.470s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m2.203s
user 0m0.010s
sys 0m0.270s
6、JFS
写测试：
debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 0.581869 seconds, 180 MB/s
real 0m0.613s
user 0m0.140s
sys 0m0.250s
读测试：
debian:/mnt/sda1# time cat test > /dev/null
real 0m0.579s
user 0m0.010s
sys 0m0.350s
JFS文件系统还真快
ext3文件系统下，
如果设置为data=journal,效果要打不少折扣哦
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