HP UX Common Internet File System (CIFS) Client/Server Software manual CIFS/NFS Open Mode Locking

B.4 Mandatory Share Mode (Open Mode) Enhancement

	CIFS/NFS Open Mode Locking
	New– HP-UX AR 0901
CIFS	NFS

Open Mode Lock

HP-UX 11

Byte Range Lock

Samba	Samba Internal	NLM
	Locking	Network Lock
	Mechanism
		Manager
User space		User space
Kernel space		Kernel space
Byte Range Lock		KLM
		Kernel Lock
		Manager

Translate Open Mode Locks

to Byte Range Locks! JFS 3.3 File System

CIFS/9000 has been enhanced to translate Windows Mandatory Share Mode (Open Mode) locks into UNIX Byte-Range locks using the fcntl function. The resulting Byte-Range locks will interoperate in the KLM with NFS Byte-Range locks, and data integrity will be provided for concurrent CIFS/NFS cross platform file access when the advisory locking protocol is adhered to. This is the most useful locking feature for providing additional data integrity for HP’s customers that will be accessing a common file set from Windows and NFS clients.

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