Thanks for response. There do has limition of # of filer - 31.88m - I foudn it, however, my question is regarding how many concurrent connections to the CIFS share, locked files, opened files and so on. For sure, as the hardware is limited, the supported # of clients is not unlimited.
For windows server - filer, we can simply run a command to have the number, net config server, the output like this,
Software version Windows Server 2012 R2 Standard
Server is active on
NetbiosSmb (server name)
NetBT_Tcpip_{15AC02A8-B085-41F5-8F54-B509583CE08C} (server name)
Server hidden No
Maximum Logged On Users 16777216
Maximum open files per session 16384
Idle session time (min) 15