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Chapter 4: File and Record Locking

This chapter describes how you can use file and record locking capabilities. Examples are given for the correct use of record locking. Misconceptions about the amount of protection that record locking affords are dispelled. Record locking should be viewed as a synchronization mechanism, not a security mechanism.

The chapter includes these topics:

"Overview of File and Record Locking" presents an introduction to locking mechanisms.
"Terminology" defines some common terms about locking.
"Using Record Locking" covers using access permissions, locking files, and getting lock information.
"Selecting Advisory or Mandatory Locking" describes mandatory locking and record locking across systems.

Overview of File and Record Locking
Using File Permissions
Using Record Locking
Selecting Advisory or Mandatory Locking
Record Locking Across Multiple Systems

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