Hello,
I done some tests for windows virtual server on KVM and Hyper-V.
All resources of VMs is same.
VM OS: Windows Server 2012 R2
SQL: MSSQL Server 2012 R2
4 GB RAM, 2 vCPUs
(virtio is used for guestos on KVM)
This is DB tpc test using HammerDB, VM on Hyper-V is stable more than KVM.
[image: Satır içi resim 4]
[image: Satır içi resim 3]
Also, I used diskspd utility to test disk performance. KVM have IOPS better
than Hyper-V, but kvm cpu usage is higher than hyper-v. I attached results
of diskspd test.
Do you have any idea about these results? I didn't expect so much
difference.
Thank you,
Gulseren Bulut
Command Line: diskspd.exe -b8K -d300 -h -L -o8 -t4 -r -w50 -c10G c:\file.dat
Input parameters:
timespan: 1
-------------
duration: 300s
warm up time: 5s
cool down time: 0s
measuring latency
random seed: 0
path: 'c:\file.dat'
think time: 0ms
burst size: 0
software and hardware write cache disabled
performing mix test (write/read ratio: 50/100)
block size: 8192
using random I/O (alignment: 8192)
number of outstanding I/O operations: 8
thread stride size: 0
threads per file: 4
using I/O Completion Ports
IO priority: normal
Results for timespan 1:
*******************************************************************************
actual test time: 300.01s
thread count: 4
proc count: 2
CPU | Usage | User | Kernel | Idle
-------------------------------------------
0| 1.45%| 0.19%| 1.26%| 98.55%
1| 0.98%| 0.17%| 0.81%| 99.01%
-------------------------------------------
avg.| 1.22%| 0.18%| 1.03%| 98.78%
Total IO
thread | bytes | I/Os | MB/s | I/O per s | AvgLat |
LatStdDev | file
-----------------------------------------------------------------------------------------------------
0 | 616742912 | 75286 | 1.96 | 250.95 | 31.960 |
63.154 | c:\file.dat (10240MB)
1 | 618373120 | 75485 | 1.97 | 251.61 | 31.872 |
63.699 | c:\file.dat (10240MB)
2 | 610467840 | 74520 | 1.94 | 248.39 | 32.294 |
65.145 | c:\file.dat (10240MB)
3 | 613466112 | 74886 | 1.95 | 249.61 | 32.130 |
63.669 | c:\file.dat (10240MB)
-----------------------------------------------------------------------------------------------------
total: 2459049984 | 300177 | 7.82 | 1000.57 | 32.063 |
63.918
Read IO
thread | bytes | I/Os | MB/s | I/O per s | AvgLat |
LatStdDev | file
-----------------------------------------------------------------------------------------------------
0 | 308985856 | 37718 | 0.98 | 125.72 | 32.878 |
53.192 | c:\file.dat (10240MB)
1 | 310673408 | 37924 | 0.99 | 126.41 | 32.858 |
53.092 | c:\file.dat (10240MB)
2 | 307200000 | 37500 | 0.98 | 125.00 | 32.725 |
50.915 | c:\file.dat (10240MB)
3 | 304930816 | 37223 | 0.97 | 124.07 | 33.047 |
52.921 | c:\file.dat (10240MB)
-----------------------------------------------------------------------------------------------------
total: 1231790080 | 150365 | 3.92 | 501.21 | 32.876 |
52.540
Write IO
thread | bytes | I/Os | MB/s | I/O per s | AvgLat |
LatStdDev | file
-----------------------------------------------------------------------------------------------------
0 | 307757056 | 37568 | 0.98 | 125.22 | 31.039 |
71.767 | c:\file.dat (10240MB)
1 | 307699712 | 37561 | 0.98 | 125.20 | 30.877 |
72.845 | c:\file.dat (10240MB)
2 | 303267840 | 37020 | 0.96 | 123.40 | 31.858 |
76.918 | c:\file.dat (10240MB)
3 | 308535296 | 37663 | 0.98 | 125.54 | 31.224 |
72.735 | c:\file.dat (10240MB)
-----------------------------------------------------------------------------------------------------
total: 1227259904 | 149812 | 3.90 | 499.36 | 31.247 |
73.581
%-ile | Read (ms) | Write (ms) | Total (ms)
----------------------------------------------
min | 0.020 | 0.032 | 0.020
25th | 7.855 | 0.094 | 6.820
50th | 17.972 | 31.222 | 24.479
75th | 38.975 | 42.687 | 41.861
90th | 74.305 | 51.164 | 56.938
95th | 107.206 | 56.472 | 79.119
99th | 221.460 | 82.274 | 196.786
3-nines | 609.951 | 1238.038 | 868.998
4-nines | 1265.153 | 2506.946 | 2448.779
5-nines | 1559.074 | 2635.976 | 2619.728
6-nines | 1824.796 | 2642.306 | 2642.306
7-nines | 1824.796 | 2642.306 | 2642.306
8-nines | 1824.796 | 2642.306 | 2642.306
max | 1824.796 | 2642.306 | 2642.306
Command Line: diskspd.exe -b8K -d300 -h -L -o8 -t4 -r -w50 -c10G c:\test.dat
Input parameters:
timespan: 1
-------------
duration: 300s
warm up time: 5s
cool down time: 0s
measuring latency
random seed: 0
path: 'c:\test.dat'
think time: 0ms
burst size: 0
software and hardware write cache disabled
performing mix test (write/read ratio: 50/100)
block size: 8192
using random I/O (alignment: 8192)
number of outstanding I/O operations: 8
thread stride size: 0
threads per file: 4
using I/O Completion Ports
IO priority: normal
Results for timespan 1:
*******************************************************************************
actual test time: 300.00s
thread count: 4
proc count: 2
CPU | Usage | User | Kernel | Idle
-------------------------------------------
0| 25.26%| 1.48%| 23.78%| 74.74%
1| 29.14%| 3.81%| 25.33%| 70.86%
-------------------------------------------
avg.| 27.20%| 2.65%| 24.55%| 72.80%
Total IO
thread | bytes | I/Os | MB/s | I/O per s | AvgLat |
LatStdDev | file
-----------------------------------------------------------------------------------------------------
0 | 1212678144 | 148032 | 3.85 | 493.44 | 16.175 |
319.377 | c:\test.dat (10240MB)
1 | 1216749568 | 148529 | 3.87 | 495.10 | 16.115 |
318.842 | c:\test.dat (10240MB)
2 | 1214291968 | 148229 | 3.86 | 494.10 | 16.153 |
319.141 | c:\test.dat (10240MB)
3 | 1215520768 | 148379 | 3.86 | 494.60 | 16.134 |
318.986 | c:\test.dat (10240MB)
-----------------------------------------------------------------------------------------------------
total: 4859240448 | 593169 | 15.45 | 1977.23 | 16.144 |
319.086
Read IO
thread | bytes | I/Os | MB/s | I/O per s | AvgLat |
LatStdDev | file
-----------------------------------------------------------------------------------------------------
0 | 607404032 | 74146 | 1.93 | 247.15 | 16.383 |
321.893 | c:\test.dat (10240MB)
1 | 611082240 | 74595 | 1.94 | 248.65 | 16.210 |
320.468 | c:\test.dat (10240MB)
2 | 608944128 | 74334 | 1.94 | 247.78 | 15.444 |
311.069 | c:\test.dat (10240MB)
3 | 605749248 | 73944 | 1.93 | 246.48 | 16.624 |
324.600 | c:\test.dat (10240MB)
-----------------------------------------------------------------------------------------------------
total: 2433179648 | 297019 | 7.73 | 990.06 | 16.164 |
319.541
Write IO
thread | bytes | I/Os | MB/s | I/O per s | AvgLat |
LatStdDev | file
-----------------------------------------------------------------------------------------------------
0 | 605274112 | 73886 | 1.92 | 246.29 | 15.966 |
316.832 | c:\test.dat (10240MB)
1 | 605667328 | 73934 | 1.93 | 246.45 | 16.020 |
317.193 | c:\test.dat (10240MB)
2 | 605347840 | 73895 | 1.92 | 246.32 | 16.867 |
327.058 | c:\test.dat (10240MB)
3 | 609771520 | 74435 | 1.94 | 248.12 | 15.647 |
313.308 | c:\test.dat (10240MB)
-----------------------------------------------------------------------------------------------------
total: 2426060800 | 296150 | 7.71 | 987.17 | 16.124 |
318.630
%-ile | Read (ms) | Write (ms) | Total (ms)
----------------------------------------------
min | 0.302 | 0.291 | 0.291
25th | 4.419 | 4.459 | 4.440
50th | 6.561 | 6.582 | 6.572
75th | 9.130 | 9.145 | 9.138
90th | 27.491 | 27.587 | 27.545
95th | 43.442 | 43.376 | 43.411
99th | 77.055 | 77.272 | 77.176
3-nines | 258.148 | 263.593 | 263.227
4-nines | 8657.034 | 8602.120 | 8655.870
5-nines | 38314.074 | 38311.504 | 38312.383
6-nines | 38315.215 | 38311.863 | 38315.215
7-nines | 38315.215 | 38311.863 | 38315.215
8-nines | 38315.215 | 38311.863 | 38315.215
max | 38315.215 | 38311.863 | 38315.215
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