If I want all my servers to have concurrent read-write access to the same volume, what would be the best approach "NAS-head" or a file server?

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There wouldn't be any difference between NAS and a file server -– they both are doing remote file serving using protocols such as NFS and CIFS.

You said volume but I assume you mean a filesystem and not block I/O to a LUN. There is a difference between the way NFS and CIFS handle the locking on files for access that would make a difference when you have multiple clients updating the data.

You really need to know how the application works with NAS and whether it can handle the advisory level locking done by NFS or the hard locks done by CIFS.

Randy Kerns

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This was first published in March 2004

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