HP UX Common Internet File System (CIFS) Client/Server Software manual

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Chapter 6 CIFS/9000 File Locking Interoperability Examples

Because the primary benefit of CIFS/9000 is to provide Windows client access to files residing on a UNIX operating system, shared client access examples all include at least one Windows client. The following examples will explain how file locking behaves when more than one client accesses a file via a CIFS/9000 share, both locally and NFS mounted.

6.1WINDOWS ONLY CLIENT ACCESS – Local File System

Clients

Windows

UNIX

PC-NFS

CIFS/9000

Windows

CIFS/9000	NFS
File

The diagram above shows 2 windows clients requesting concurrent file access on the CIFS/9000 server to a local file system. The key issue for this configuration is that CIFS/9000 provides full Windows file locking functionality in a Windows homogenous environment.

Mandatory Share Mode (Open Mode) locking is fully implemented.

Byte Range locking is fully implemented.

Opportunistic (Oplocks) locking is fully implemented.

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Contents Eric Roseme Snsl Advanced Technology Center Version 1.03 SeptemberE0300 Legal Notices Copyright NoticesContents Introduction CIFS/9000 Product Overview File Locking Overview ACLPage File Locking Implementations Windows CifsPage Unix NFSPC NFS Mandatory Share Mode Locking Open Mode CIFS/9000 File Locking ImplementationPage Page Page Windows only Client Access Local File System CIFS/9000 File Locking Interoperability ExamplesPage Windows only Client Access NFS Mounted File System Page Windows and Unix Client Access Local File System Page Windows and Unix Client Access NFS Mounted File System Page UNIX/NFS PC-NFS Page Unix PC-NFS Page Clients Page Mandatory Share Mode Open Mode CIFS/9000 CIFS/9000 Locking SummaryByte Range Locking OplocksCIFS/9000 Competition Locking Summary Mandatory Share Mode Open Mode Network AppliancePage Mandatory Share Mode Open Mode EMC Celerra EMC CelerraPage Auspex NeTservices Mandatory Share Mode Open Mode Auspex NeTservicesPage Mandatory Share Mode Open Mode Veritas FSE Veritas File Server EditionLocking Summary Table EMCCIFS/9000 File Locking Interoperability Summary Page Smb.conf for Windows-Only Access Appendix a smb.conf ExamplesSmb.conf for Mixed-Mode Access Appendix B Sales Tool Locking Technology Examples Determine Locking RequirementByte Range Locking CIFS/NFS Open Mode Locking CIFS/NFS Open Mode Locking Competitor’s Claims for NFS Non-Locking Protection

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