By making use of a distributed file system, users of physicallydistributed computers are allowed to share data and storageresources. This paper compares three distributed filesystems: theSun NFS filesystem, Samba and OpenAFS. The emphasis of thecomparison is on the functionality, management and performance ofthese three file systems in a heterogenous network. The iozonefilesystem benchmark tool was used to gathered information abouthow well these filesystems performs read/write operations, inorder to numerically characterize the performance. Analyzing andproperly understanding the data gathered from the measurements,reveals that Samba and NFS perform almost equally on windowsmachines equipped with different Operating Systems and hardware.On a client running SuSE9.1 NFS has the best performance for bothread and write operations. OpenAFS had the lowest performance onwindows machines and on the client running it performed as well asSamba. The paper concludes with a recommendation for whichdistributed filesystem best suits which computing environment.