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Slow throughput when using Robocopy or Rsync to copy small files

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • Data ONTAP 7-mode

Issue

  • Slow throughput when using Robocopy, rsync, iperf3, or other tool to copy small files
  • Slow file copies reported when a folder with multiple files are copied from local machine to NAS share

PS C:\Users\ATP> ROBOCOPY  /R:1 /W:3 /E /Z "C:\folder1\folder2" "\\xx.xx.xx.xx\atpdatapune\New folder"
-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows
-------------------------------------------------------------------------------
  Started : 12 November 2025 12:56:29
   Source : C:\folder1\folder2
     Dest : \\xx.xx.xx.xx\atpdatapune\New folder
    Files : *.*
  Options : *.* /S /E /DCOPY:DA /COPY:DAT /Z /R:1 /W:3
------------------------------------------------------------------------------
                        2207    C:\ATP\Procedures\e2e_nvapp_atp\
            New File                   0        filename
            New File                   0        filename
            New File                   0        filename
            New File                   0        filename

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