{"id":5858,"date":"2022-07-13T23:54:10","date_gmt":"2022-07-13T23:54:10","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=5858"},"modified":"2022-07-13T23:54:10","modified_gmt":"2022-07-13T23:54:10","slug":"how-to-check-for-drive-latency-to-veeam-backup-troubleshooting","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/how-to-check-for-drive-latency-to-veeam-backup-troubleshooting","title":{"rendered":"How to check for drive latency to Veeam backup Troubleshooting"},"content":{"rendered":"

Use case: Backup was running really slowly. Tracking the Veeam backup log it was using a server for the repository. Logging in to the server we checked via Resource Monitor to the Veeamagent.exe (below is a sample screenshot the job isn\u2019t running now), and checked the active time against the write disk which was D:. Active time was showing as 100%.<\/p>

\"\"<\/p>

From there utilising diskspd command we were able to determine the latency on the disk was high.<\/p>

DiskSpd quick download link: https:\/\/aka.ms\/getdiskspd<\/a><\/p>

  1. Command to run: \u00a0\u00a0diskspd.exe -c25G -b512K\u00a0-w100\u00a0-Sh -d600 -L\u00a0D:\\testfile.dat

    where -w = amount of write performance \u2013 i.e. 100 = 100% write, 50 = 50% read + 50% write
    D: = the drive to perform the test against

    <\/li>
  2. This will write a file to the disk to perform the tests against<\/li>
  3. Below outputs the CPU usage, as well as results for IO. It\u2019s a bit convoluted but check the\u00a0AvgLat\u00a0(check NHADR01 much better\u00a0J\u00a0)

    <\/li>
  4. Don\u2019t forget to delete the\u00a0D:\\testfile.dat\u00a0at the test completion<\/li><\/ol>

    \u00a0<\/p>

    For the server on first run it looked to be 65ms, but re-run showing about 36ms, nominal value should be <15ms.<\/p>

    C:\\temp\\DiskSpd\\x86>diskspd.exe -c25G -b512K -w50 -Sh -d600 -L D:\\testfile.dat<\/p>

    Command Line: diskspd.exe -c25G -b512K -w50 -Sh -d600 -L D:\\testfile.dat<\/p>

    Input parameters:<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 timespan:\u00a0\u00a0 1<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ————-<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 duration: 600s<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 warm up time: 5s<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cool down time: 0s<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 measuring latency<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 random seed: 0<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 path: ‘D:\\testfile.dat’<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 think time: 0ms<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 burst size: 0<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 software cache disabled<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 hardware write cache disabled, writethrough on<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 performing mix test (read\/write ratio: 50\/50)<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 block size: 512KiB<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 using sequential I\/O (stride: 512KiB)<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 number of outstanding I\/O operations per thread: 2<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0threads per file: 1<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 using I\/O Completion Ports<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 IO priority: normal<\/p>

    \u00a0<\/p>

    Results for timespan 1:<\/p>

    *******************************************************************************<\/p>

    \u00a0<\/p>

    actual test time:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 600.00s<\/p>

    thread count:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1<\/p>

    proc count:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8<\/p>

    \u00a0<\/p>

    CPU |\u00a0 Usage |\u00a0 User\u00a0 |\u00a0 Kernel |\u00a0 Idle<\/p>

    ——————————————-<\/p>

    \u00a0\u00a0 0| \u00a012.68%|\u00a0\u00a0 5.39%|\u00a0\u00a0\u00a0 7.29%|\u00a0 87.32%<\/p>

    \u00a0\u00a0 1|\u00a0 16.12%|\u00a0\u00a0 8.14%|\u00a0\u00a0\u00a0 7.98%|\u00a0 83.88%<\/p>

    \u00a0\u00a0 2|\u00a0 15.51%|\u00a0\u00a0 8.10%|\u00a0\u00a0\u00a0 7.41%|\u00a0 84.49%<\/p>

    \u00a0\u00a0 3|\u00a0 20.18%|\u00a0\u00a0 9.90%|\u00a0\u00a0 10.28%|\u00a0 79.82%<\/p>

    \u00a0\u00a0 4|\u00a0 20.34%|\u00a0\u00a0 8.52%|\u00a0\u00a0 11.83%|\u00a0 79.66%<\/p>

    \u00a0\u00a0 5|\u00a0 17.43%|\u00a0\u00a0 5.72%|\u00a0\u00a0 11.71%|\u00a0 82.57%<\/p>

    \u00a0\u00a0 6|\u00a0 39.53%|\u00a0 13.31%|\u00a0\u00a0 26.23%|\u00a0 60.47%<\/p>

    \u00a0\u00a0 7|\u00a0 53.09%|\u00a0 26.06%|\u00a0\u00a0 27.03%|\u00a0 46.91%<\/p>

    ——————————————-<\/p>

    avg.|\u00a0 24.36%|\u00a0 10.64%|\u00a0\u00a0 13.72%|\u00a0 75.64%<\/p>

    \u00a0<\/p>

    Total IO<\/p>

    thread |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 bytes\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0 I\/Os\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 MiB\/s\u00a0\u00a0 |\u00a0 I\/O per s |\u00a0 AvgLat\u00a0 | LatStdDev |\u00a0 file<\/p>

    —————————————————————————————————–<\/p>

    \u00a0\u00a0\u00a0\u00a0 0 |\u00a0\u00a0\u00a0\u00a0 26373259264 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 50303 |\u00a0\u00a0\u00a0\u00a0\u00a0 41.92 |\u00a0\u00a0\u00a0\u00a0\u00a0 83.84 |\u00a0\u00a0 23.852 |\u00a0\u00a0\u00a0 19.811 | D:\\testfile.dat (25GiB)<\/p>

    —————————————————————————————————–<\/p>

    total:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 26373259264 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 50303 |\u00a0\u00a0\u00a0\u00a0\u00a0 41.92 |\u00a0\u00a0\u00a0\u00a0\u00a0 83.84 |\u00a0\u00a0 23.852 |\u00a0\u00a0\u00a0 19.811<\/p>

    \u00a0<\/p>

    Read IO<\/p>

    thread |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 bytes\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0 I\/Os\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 MiB\/s\u00a0\u00a0 |\u00a0 I\/O per s |\u00a0\u00a0AvgLat\u00a0 | LatStdDev |\u00a0 file<\/p>

    —————————————————————————————————–<\/p>

    \u00a0\u00a0\u00a0\u00a0 0 |\u00a0\u00a0\u00a0\u00a0 13206814720 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25190 |\u00a0\u00a0\u00a0\u00a0\u00a0 20.99 |\u00a0\u00a0 \u00a0\u00a0\u00a041.98 |\u00a0\u00a0\u00a011.030\u00a0|\u00a0\u00a0\u00a0 12.632 | D:\\testfile.dat (25GiB)<\/p>

    —————————————————————————————————–<\/p>

    total:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 13206814720 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25190 |\u00a0\u00a0\u00a0\u00a0\u00a0 20.99 |\u00a0\u00a0\u00a0\u00a0\u00a0 41.98 |\u00a0\u00a0\u00a011.030\u00a0|\u00a0\u00a0\u00a0 12.632<\/p>

    \u00a0<\/p>

    Write IO<\/p>

    thread |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 bytes\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0 I\/Os\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 MiB\/s\u00a0\u00a0 |\u00a0 I\/O per s |\u00a0\u00a0AvgLat\u00a0 | LatStdDev |\u00a0 file<\/p>

    —————————————————————————————————–<\/p>

    \u00a0\u00a0\u00a0\u00a0 0 |\u00a0\u00a0\u00a0\u00a0 13166444544 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25113 |\u00a0\u00a0\u00a0\u00a0\u00a0 20.93 |\u00a0\u00a0\u00a0\u00a0\u00a0 41.85 |\u00a0\u00a0\u00a036.713\u00a0|\u00a0\u00a0\u00a0 17.198 | D:\\testfile.dat (25GiB)<\/p>

    —————————————————————————————————–<\/p>

    total:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 13166444544 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 25113 |\u00a0\u00a0\u00a0\u00a0\u00a0 20.93 |\u00a0\u00a0\u00a0\u00a0\u00a0 41.85 |\u00a0\u00a0\u00a036.713\u00a0|\u00a0\u00a0\u00a0 17.198<\/p>

    \u00a0<\/p>

    total:<\/p>

    \u00a0 %-ile |\u00a0 Read (ms) | Write (ms) | Total (ms)<\/p>

    ———————————————-<\/p>

    \u00a0\u00a0\u00a0 min |\u00a0\u00a0\u00a0\u00a0\u00a0 0.409 |\u00a0\u00a0\u00a0\u00a0\u00a0 7.884 |\u00a0\u00a0\u00a0\u00a0\u00a0 0.409<\/p>

    \u00a0\u00a0 25th |\u00a0\u00a0\u00a0\u00a0\u00a0 0.862 |\u00a0\u00a0\u00a0\u00a0 26.752 |\u00a0\u00a0\u00a0\u00a0\u00a0 8.213<\/p>

    \u00a0\u00a0 50th |\u00a0\u00a0\u00a0\u00a0\u00a0 8.226 |\u00a0\u00a0\u00a0\u00a0 33.792 |\u00a0\u00a0\u00a0\u00a0 24.334<\/p>

    \u00a0\u00a0 75th |\u00a0\u00a0\u00a0\u00a0 16.143 |\u00a0\u00a0\u00a0\u00a0 42.002 |\u00a0\u00a0\u00a0\u00a0 34.450<\/p>

    \u00a0\u00a0 90th |\u00a0\u00a0\u00a0\u00a0 26.738 |\u00a0\u00a0\u00a0\u00a0 53.704 |\u00a0\u00a0\u00a0\u00a0 44.964<\/p>

    \u00a0\u00a0 95th |\u00a0\u00a0\u00a0\u00a0 34.337 |\u00a0\u00a0\u00a0\u00a0 66.108 |\u00a0\u00a0\u00a0\u00a0 55.452<\/p>

    \u00a0\u00a0 99th |\u00a0\u00a0\u00a0\u00a0 53.328 |\u00a0\u00a0\u00a0 100.045 |\u00a0\u00a0\u00a0\u00a0 85.139<\/p>

    3-nines |\u00a0\u00a0\u00a0\u00a0 94.580 |\u00a0\u00a0\u00a0 167.428 |\u00a0\u00a0\u00a0 148.197<\/p>

    4-nines |\u00a0\u00a0\u00a0 167.318 |\u00a0\u00a0\u00a0 382.972 | \u00a0\u00a0\u00a0361.199<\/p>

    5-nines |\u00a0\u00a0\u00a0 370.126 |\u00a0\u00a0\u00a0 468.161 |\u00a0\u00a0\u00a0 468.161<\/p>

    6-nines |\u00a0\u00a0\u00a0 370.126 |\u00a0\u00a0\u00a0 468.161 |\u00a0\u00a0\u00a0 468.161<\/p>

    7-nines |\u00a0\u00a0\u00a0 370.126 |\u00a0\u00a0\u00a0 468.161 |\u00a0\u00a0\u00a0 468.161<\/p>

    8-nines |\u00a0\u00a0\u00a0 370.126 |\u00a0\u00a0\u00a0 468.161 |\u00a0\u00a0\u00a0 468.161<\/p>

    9-nines |\u00a0\u00a0\u00a0 370.126 |\u00a0\u00a0\u00a0 468.161 |\u00a0\u00a0\u00a0 468.161<\/p>

    \u00a0\u00a0\u00a0 max |\u00a0\u00a0\u00a0 370.126 |\u00a0\u00a0\u00a0 468.161 |\u00a0\u00a0\u00a0 468.161<\/p>

    \u00a0<\/p>

    Command Line: diskspd.exe -c25G -b512K -w50 -Sh -d600 -L D:\\testfile.dat<\/p>

    Input parameters:<\/p>

    \u00a0<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 timespan:\u00a0\u00a0 1<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ————-<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 duration: 600s<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 warm up time: 5s<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cool down time: 0s<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 measuring latency<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 random seed: 0<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 path: ‘D:\\testfile.dat’<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 think time: 0ms<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 burst size: 0<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 software cache disabled<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0hardware write cache disabled, writethrough on<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 performing mix test (read\/write ratio: 50\/50)<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 block size: 512KiB<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 using sequential I\/O (stride: 512KiB)<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 number of outstanding I\/O operations per thread: 2<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 threads per file: 1<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 using I\/O Completion Ports<\/p>

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 IO priority: normal<\/p>

    \u00a0<\/p>

    Results for timespan 1:<\/p>

    *******************************************************************************<\/p>

    actual test time:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 600.00s<\/p>

    thread count:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1<\/p>

    proc count:\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a08<\/p>

    \u00a0<\/p>

    CPU |\u00a0 Usage |\u00a0 User\u00a0 |\u00a0 Kernel |\u00a0 Idle<\/p>

    ——————————————-<\/p>

    \u00a0\u00a0 0|\u00a0 27.43%|\u00a0\u00a0 8.87%|\u00a0\u00a0 18.56%|\u00a0 72.57%<\/p>

    \u00a0\u00a0 1|\u00a0 36.37%|\u00a0 14.08%|\u00a0\u00a0 22.29%|\u00a0 63.63%<\/p>

    \u00a0\u00a0 2|\u00a0 29.94%|\u00a0\u00a0 9.99%|\u00a0\u00a0 19.95%|\u00a0 70.06%<\/p>

    \u00a0\u00a0 3|\u00a0 39.66%|\u00a0\u00a0 9.76%|\u00a0\u00a0 29.90%| \u00a060.34%<\/p>

    \u00a0\u00a0 4|\u00a0 23.94%|\u00a0\u00a0 8.85%|\u00a0\u00a0 15.09%|\u00a0 76.06%<\/p>

    \u00a0\u00a0 5|\u00a0 56.65%|\u00a0 14.87%|\u00a0\u00a0 41.77%|\u00a0 43.35%<\/p>

    \u00a0\u00a0 6|\u00a0 27.74%|\u00a0\u00a0 7.14%|\u00a0\u00a0 20.61%|\u00a0 72.26%<\/p>

    \u00a0\u00a0 7|\u00a0 29.32%|\u00a0\u00a0 4.17%|\u00a0\u00a0 25.15%|\u00a0 70.68%<\/p>

    ——————————————-<\/p>

    avg.|\u00a0 33.88%|\u00a0\u00a0 9.72%|\u00a0\u00a0 24.16%|\u00a0 66.12%<\/p>

    Total IO<\/p>

    thread |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 bytes\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0 I\/Os\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 MiB\/s\u00a0\u00a0 |\u00a0 I\/O per s |\u00a0 AvgLat\u00a0 | LatStdDev |\u00a0 file<\/p>

    —————————————————————————————————–<\/p>

    \u00a0\u00a0\u00a0\u00a0 0 |\u00a0\u00a0\u00a0\u00a0 69124751360 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 131845 |\u00a0\u00a0\u00a0\u00a0 109.87 |\u00a0\u00a0\u00a0\u00a0 219.74 |\u00a0\u00a0\u00a0 9.099 |\u00a0\u00a0\u00a0 20.606 | D:\\testfile.dat (25GiB)<\/p>

    —————————————————————————————————–<\/p>

    total:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 69124751360 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 131845 |\u00a0\u00a0\u00a0\u00a0 109.87 |\u00a0\u00a0\u00a0\u00a0 219.74 |\u00a0\u00a0\u00a0 9.099 |\u00a0\u00a0\u00a0 20.606<\/p>

    Read IO<\/p>

    thread |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 bytes\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0 I\/Os\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 MiB\/s\u00a0\u00a0 |\u00a0 I\/O per s |\u00a0\u00a0AvgLat\u00a0 | LatStdDev |\u00a0 file<\/p>

    —————————————————————————————————–<\/p>

    \u00a0\u00a0\u00a0\u00a0 0 |\u00a0\u00a0\u00a0\u00a0 34584657920 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 65965 |\u00a0\u00a0\u00a0\u00a0\u00a0 54.97 |\u00a0\u00a0\u00a0\u00a0 109.94 |\u00a0\u00a0\u00a013.611\u00a0|\u00a0\u00a0\u00a0 24.586 | D:\\testfile.dat (25GiB)<\/p>

    —————————————————————————————————–<\/p>

    total:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 34584657920 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 65965 |\u00a0\u00a0\u00a0\u00a0\u00a0 54.97 |\u00a0\u00a0\u00a0\u00a0 109.94 |\u00a0\u00a0\u00a013.611\u00a0|\u00a0\u00a0\u00a0 24.586<\/p>

    Write IO<\/p>

    thread |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 bytes\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0 I\/Os\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 MiB\/s\u00a0\u00a0 |\u00a0 I\/O per s |\u00a0\u00a0AvgLat\u00a0 | LatStdDev |\u00a0 file<\/p>

    —————————————————————————————————–<\/p>

    \u00a0\u00a0\u00a0\u00a0 0 |\u00a0\u00a0\u00a0\u00a0 34540093440 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 65880 |\u00a0\u00a0\u00a0\u00a0\u00a0 54.90 |\u00a0\u00a0\u00a0\u00a0 109.80 |\u00a0\u00a0\u00a0\u00a04.581\u00a0|\u00a0\u00a0\u00a0 14.271 | D:\\testfile.dat (25GiB)<\/p>

    —————————————————————————————————–<\/p>

    total:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 34540093440 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 65880 |\u00a0\u00a0\u00a0\u00a0\u00a0 54.90 |\u00a0\u00a0\u00a0\u00a0 109.80 |\u00a0\u00a0\u00a0\u00a04.581\u00a0|\u00a0\u00a0\u00a0 14.271<\/p>

    total:<\/p>

    \u00a0 %-ile |\u00a0 Read (ms) | Write (ms) | Total (ms)<\/p>

    ———————————————-<\/p>

    \u00a0\u00a0\u00a0 min |\u00a0\u00a0\u00a0\u00a0\u00a0 0.466 |\u00a0\u00a0\u00a0\u00a0\u00a0 0.437 |\u00a0\u00a0\u00a0\u00a0\u00a0 0.437<\/p>

    \u00a0\u00a0 25th |\u00a0\u00a0\u00a0\u00a0\u00a0 1.995 |\u00a0\u00a0\u00a0\u00a0\u00a0 0.584 |\u00a0\u00a0\u00a0\u00a0\u00a0 0.701<\/p>

    \u00a0\u00a0 50th |\u00a0\u00a0\u00a0\u00a0\u00a0 6.506 |\u00a0\u00a0\u00a0\u00a0\u00a0 0.725 |\u00a0\u00a0\u00a0\u00a0\u00a0 2.066<\/p>

    \u00a0\u00a0 75th |\u00a0\u00a0\u00a0\u00a0 13.976 |\u00a0\u00a0\u00a0\u00a0\u00a0 2.269 |\u00a0\u00a0\u00a0\u00a0\u00a0 9.971<\/p>

    \u00a0\u00a0 90th |\u00a0\u00a0\u00a0\u00a0 30.622 |\u00a0\u00a0\u00a0\u00a0 10.937 |\u00a0\u00a0\u00a0\u00a0 21.618<\/p>

    \u00a0\u00a0 95th |\u00a0\u00a0\u00a0\u00a0 50.217 |\u00a0\u00a0\u00a0\u00a0 19.840 |\u00a0\u00a0\u00a0\u00a0 36.896<\/p>

    \u00a0\u00a0 99th |\u00a0\u00a0\u00a0 129.307 |\u00a0\u00a0\u00a0\u00a0 62.694 |\u00a0\u00a0\u00a0 103.474<\/p>

    3-nines |\u00a0\u00a0\u00a0 251.222 |\u00a0\u00a0\u00a0 186.690 |\u00a0\u00a0\u00a0 234.561<\/p>

    4-nines |\u00a0\u00a0\u00a0 374.508 |\u00a0\u00a0\u00a0 294.005 |\u00a0\u00a0\u00a0 353.957<\/p>

    5-nines |\u00a0\u00a0\u00a0 420.817 |\u00a0\u00a0\u00a0 357.480 |\u00a0\u00a0\u00a0 395.550<\/p>

    6-nines |\u00a0\u00a0\u00a0 420.817 |\u00a0\u00a0\u00a0 357.480 |\u00a0\u00a0\u00a0 420.817<\/p>

    7-nines |\u00a0\u00a0\u00a0 420.817 |\u00a0\u00a0\u00a0 357.480 |\u00a0\u00a0\u00a0 420.817<\/p>

    8-nines |\u00a0\u00a0\u00a0 420.817 |\u00a0\u00a0\u00a0 357.480 |\u00a0\u00a0\u00a0 420.817<\/p>

    9-nines |\u00a0\u00a0\u00a0 420.817 |\u00a0\u00a0\u00a0 357.480 |\u00a0\u00a0\u00a0 420.817<\/p>

    \u00a0\u00a0\u00a0 max |\u00a0\u00a0\u00a0 420.817 |\u00a0\u00a0\u00a0 357.480 |\u00a0\u00a0\u00a0 420.817<\/p>","protected":false},"excerpt":{"rendered":"

    Use case: Backup was running really slowly. Tracking the Veeam backup log it was using a server for the repository. Logging in to the server we checked […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1145,3846,3845,3847,739],"class_list":["post-5858","post","type-post","status-publish","format-standard","hentry","category-research","tag-disk","tag-disk-speed","tag-diskspd","tag-latency","tag-veeam"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t