UNIX/LINUX，linux讀寫文件測試,Linux下各種主要文件系統的讀寫性能測試

1、不用說，tmpfs是最快的，呵呵

2、ext2

寫測試：

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UNIX/LINUX、CODE:

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

linux文件系統由什么組成。real 0m1.414s

user 0m0.140s

sys 0m0.230s

讀測試：

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dockerfile cmd entrypoint。CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m2.084s

user 0m0.000s

sys 0m0.310s

linux 文件、3、ext3

(1)data=ordered

寫測試：

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CODE:

linux讀寫，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

修改Linux可讀文件，user 0m0.090s

sys 0m0.580s

讀測試：

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CODE:

linux修改文件、debian:/mnt/sda1# time cat test > /dev/null

real 0m1.429s

user 0m0.020s

sys 0m0.290s

(2)data=writeback

linux文件系統有哪些？寫測試：

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CODE:

debian:/mnt/sda1# time dd if=/dev/zero of=test bs=1024 count=100K

102400+0 records in

linux移動文件，102400+0 records out

104857600 bytes (105 MB) copied, 0.990267 seconds, 106 MB/s

real 0m1.004s

user 0m0.110s

sys 0m0.470s

linux賦予用戶讀寫權限，讀測試：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.339s

linux修改文件讀寫權限命令，user 0m0.010s

sys 0m0.250s

(3)data=journal

寫測試：

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LINUX系統，CODE:

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

linux讀寫執行權限。real 0m6.470s

user 0m0.080s

sys 0m0.590s

讀測試：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.665s

user 0m0.010s

sys 0m0.220s

4、ReiserFS

寫測試：

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CODE:

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

讀測試：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m1.543s

user 0m0.000s

sys 0m0.240s

5、XFS

寫測試：

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CODE:

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

讀測試：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m2.203s

user 0m0.010s

sys 0m0.270s

6、JFS

寫測試：

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CODE:

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

讀測試：

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CODE:

debian:/mnt/sda1# time cat test > /dev/null

real 0m0.579s

user 0m0.010s

sys 0m0.350s

JFS文件系統還真快

ext3文件系統下，如果設置為data=journal,效果要打不少折扣。