vr.org的硬盘io真杯具

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dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 40.7537 s, 2.6 MB/s

records

8 replies • 1970-01-01 08:00:00 +08:00

tarsier

May 3, 2013

我的vr

dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.221937 s, 472 MB/s

iZr

May 3, 2013

dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.436161 s, 240 MB/s

46fo

May 3, 2013

他这个是没有限制的时好时慢最怕折腾帝

zencoding

May 3, 2013

root@hk:~# dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.438553 s, 239 MB/s
root@hk:~# dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 1.45601 s, 72.0 MB/s
root@hk:~# dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.28446 s, 369 MB/s
root@hk:~# dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.25484 s, 411 MB/s
root@hk:~# dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.265704 s, 395 MB/s

helloleo

May 10, 2013

dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync

helloleo

May 10, 2013

➜ ~ dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.615846 s, 170 MB/s

ericFork

May 11, 2013

其实用 SAN 的没见过性能好到哪去的

thinkxen

May 11, 2013

四台都是一个结果，同时测试的
dd if=/dev/zero of=test.bin bs=1M count=100 conv=fdatasync
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 11.7144 seconds, 9.0 MB/s