=> This cannot be quantitatively defined by NetApp but is a Microsoft support question.
Disable Directory Caching on the Windows Client. To do this, create a new DWORD registry key named DirectoryCacheLifetime in HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Lanmanworkstation\Parameters and set the value to0. You might need to reboot the Windows client for the setting to take effect. Note that this might have a negative performance impact. See Microsoft Technet for further information