Hi, Problem is not Oracle over NFS but Netapp performance compared to an Hitachi devices. Which Netapp lines have you choosen? BTW there is a note on Metalink and lots of docs about Netapp configuration. Keep in mind to disable Netapp snapshots on Oracle volumes for your safety and to right design aggregates for datafiles, flash recovery area, etc... Stefano -- http://www.stefanocislaghi.eu Sent by BlackBerry® Bold 9700 -----Original Message----- From: Thomas Roach <troach@xxxxxxxxx> Date: Mon, 19 Apr 2010 14:12:28 To: Oracle Discussion List<oracle-l@xxxxxxxxxxxxx> Subject: Oracle over NFS Hi, We are currently on Oracle RAC 10.2.0.4 (4 nodes) on Linux x86_64 RHEL 5.3. We are currently using block devices on Hitachi but have invested in a NetApp. Our 2 options are NFS (which the Unix admin favors) and Block devices over Fiber Channel. In trying the various NFS option, we have come across 2 mount options that Oracle must use. (noac and actimeo=0). With noac, the performance is horrible (about 10 MB/s) and with actimeo=0 we get about 240 MB/s which is the maximum bandwidth the interface will support (3 - 1Gbps Nics on the NetApp side). With the actimeo=0, we get better performance but see a large amount of network discards. He has essentially said I am putting it back to noac to get rid of the network discards. I said if the performance goes back to 10 MB/s then we can't move to NFS over NetApp. I wanted to get some insight from the group as I get conflicting information when researching this issue. Does anyone out there have Oracle RAC running over NFS to NetApp and if so, what mount options are you using? Any specific configurations on the NetApp side? Forgot to mention that we are using a single Cisco switch between the NetApp and Oracle servers running with jumbo frames. Thanks! Tom