Re: RAC storage options

If I may pick a few nits here, the netapp is absolutely an NFS server. It's just an nfs server that is highly optimized with integrated storage on the back-end. As far as "locking", Netapp supports NFS locking, just like a number of NFS servers - Netapp just has the most reliable implementation therein.

And as far as SAN, there's no inherent SAN protocol that allows for block-level locking between hosts. Your clustered filesystem is responsible for providing that.

Thanks,
Matt

--
Matthew Zito
GridApp Systems
Email: mzito_at_gridapp.com
Cell: 646-220-3551
Phone: 212-358-8211 x 359
http://www.gridapp.com
On Apr 13, 2004, at 4:09 PM, Mladen Gogala wrote:



> You must have physical disks shared between two or more computers. 

> That, in particular, automatically

> eliminates NFS, CIFS (SMB) and other file sharing protocols. Netapp 

> (used by our company) is not

> an NFS server, it implements locking and is a SAN implementation 

> disguised as NFS. Operating

> system must be able to lock blocks on the device and prevent other 

> nodes from accessing the

> same block. That is not supported by NFS3 protocol. 


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