>>>which performs I/O and decides about caching data blocks. So >>>now with NFS4 you have async and direct I/O and client >>>caching. Not much difference from a local disk at all. >>>The old lore no longer applies. Really good summary can be found at: >>> >>>http://www.citi.umich.edu/projects/nfsv4 2 points. CITI is funded by PolyServe and NFS4 is not needed for quality NAS service for Linux NFS clients. The Linux NFS v3 client supports O_DIRECT opens. And good NAS is good NAS. Good NAS is determined by the Oracle Storage Certification Program. http://www.byteandswitch.com/document.asp?doc_id=68559 -- //www.freelists.org/webpage/oracle-l