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Chapter 3 Administering Windows Users, Groups, Computers, and Share Points 41

Managing SMB Share Points

Share points for Windows home directories and roaming user profiles are set up

automatically on a Mac OS X Server primary domain controller (PDC), but you can set

up other share points. Windows uses the server message block (SMB) protocol to

access share points.

The default share point for Windows home directories is the same as the share

point for Mac OS X home directories. The default share point for user profiles is the

/Users/Profiles/ folder on the PDC server. (This SMB share point is not shown in

Workgroup Manager.) You can set up alternate SMB share points for home directories

and user profiles on the PDC server or on domain member servers.

You can set up additional share points for exclusive or nonexclusive use of Windows

users. For example, you could set up a share point where Windows and Mac OS users

save shared graphics or word processing files that can be used on either platform.

Conversely, you could set up a share point for SMB access only, so that Windows users

have a network location for files that can’t be used on other platforms.

For an overview of share points, including a discussion of issues you may want to

consider before creating them, see the share points chapter in the file services

administration guide.

Opportunistic Locking (oplocks)

SMB share points in Mac OS X Server support the improved performance offered by

opportunistic locking (“oplocks”).

In general, file locking prevents multiple clients from modifying the same information

at the same time; a client locks the file or part of the file to gain exclusive access.

Opportunistic locking grants this exclusive access but also allows the client to cache its

changes locally (on the client computer) for improved performance.

To enable oplocks, you change the Windows protocol settings for a share point using

Workgroup Manager.

Important: Do not enable oplocks for a share point that’s using any protocol other

than SMB.

Strict Locking

It’s normally the responsibility of a client application to see if a file is locked before it

tries to open it. A poorly written application may fail to check for locks, and could

corrupt a file already being used by someone else.

Strict locking, which is enabled by default, helps prevent this. When strict locking is

enabled, the SMB server itself checks for and enforces file locks.

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Apple Mac OS X Server Version 10.3 or Later Bedienungsanleitung Seite 41