Vtrois

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Jan 2, 2018

Replied to a topic by sky77733 › 云计算 › 腾讯云的云硬盘用 DD 命令测试仅有 1.6MB/s 的速度，但腾讯云的工作人员坚称符合预期，由于我对 IO 这块不太熟悉，请大家帮忙看看，谢谢

下面是使用 dsync 的返回结果
北京三区 S2：
[root@VM_37_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test oflag=dsync
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 98.123 s, 2.7 MB/s

real 1m38.137s
user 0m0.014s
sys 0m0.535s

北京一区 S1：
[root@VM_25_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test oflag=dsync
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 66.7693 s, 4.0 MB/s

real 1m6.810s
user 0m0.019s
sys 0m0.826s

香港一区 S1：
[root@VM_31_4_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test oflag=dsync
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 110.715 s, 2.4 MB/s

real 1m50.731s
user 0m0.018s

Jan 2, 2018

Replied to a topic by sky77733 › 云计算 › 腾讯云的云硬盘用 DD 命令测试仅有 1.6MB/s 的速度，但腾讯云的工作人员坚称符合预期，由于我对 IO 这块不太熟悉，请大家帮忙看看，谢谢

刚拿了几台小水管的普通云盘机器测了一下供参考。

北京三区 S2：
[root@VM_37_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.24492 s, 216 MB/s

real 0m1.247s
user 0m0.001s
sys 0m0.218s

[root@VM_37_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 0.949805 s, 283 MB/s
real 0m1.004s
user 0m0.000s
sys 0m0.242s

[root@VM_37_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 0.774501 s, 347 MB/s
real 0m0.804s
user 0m0.000s
sys 0m0.242s

北京一区 S1：
[root@VM_25_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.78932 s, 150 MB/s
real 0m1.863s
user 0m0.001s
sys 0m0.320s

[root@VM_25_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.3384 s, 201 MB/s
real 0m1.424s
user 0m0.001s
sys 0m0.368s

[root@VM_25_8_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.35347 s, 198 MB/s
real 0m1.399s
user 0m0.000s
sys 0m0.368s

香港一区 S1：
[root@VM_31_4_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 2.09602 s, 128 MB/s
real 0m2.811s
user 0m0.001s
sys 0m0.282s

[root@VM_31_4_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 2.46486 s, 109 MB/s
real 0m2.919s
user 0m0.004s
sys 0m0.290s

[root@VM_31_4_centos ~]# time dd bs=64k count=4k if=/dev/zero of=test
4096+0 records in
4096+0 records out
268435456 bytes (268 MB) copied, 1.89162 s, 142 MB/s
real 0m3.032s
user 0m0.000s
sys 0m0.296s

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