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Chapter 8. Managing file systems > Centralized BRLM support - Pg. 525

8.102 Centralized BRLM support Lock all or part of a file that you are accessing for: Read-write purposes As a default, the lock manager is initialized on only one system in the sysplex The first system that enters the sysplex initializes the BRLM and becomes the system that owns the manager - This is called a centralized BRLM If the BRLM server crashes, or owning system partitioned out of the sysplex BRLM is reactivated on another system in the group All locks that were held are lost An application that accesses a file previously locked receives an I/O error - must close and reopen the file