hi... I have got info from expert.... SMB->10,000 NFS->750 Isilon Guidelines for Large Workloads (OneFS 7.0.2) Isilon Guidelines for Large Workloads (OneFS 7.1)    thanks !
hi there ...  Isilon has no limitation for number of FS .... but what about shares ? or about export path in NFS ? or mixed enviroment ?   thanks ! 
Max number of Shares /Exports path