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OpenVMS Distributed Lock Manager Basics
Topic Area:
Track: Open VMS
Topic: Internals
Type:  Breakout Session

Schedule:
11/10/99   03:00 PM     Duration: 90 Min.     Room: 2

Presenter:
Tom Speake
Managing Director, Timpson Weber Associates, Inc.  

Abstract:
The OpenVMS Distributed Lock Manager is the underlying mechanism that allows OpenVMS Clusters to be "shared everything". This mechanism is generally transparent to the average application programmer. System managers should be familiar with the operation of the distributed lock manager in order to properly tune their system(s). For example, the widely held belief that setting LOCKDIRWT to zero shuts off locking on a given node is not true. System programmers should understand distributed lock manager operation in order to optimize system programs and to write effective failover routines.

Objectives:
Describe how the OpenVMS Distributed Lock Manager interfaces with other OpenVMS O/S components
 
List the major steps in granting a lock to a process
 
Explaing the effect of LOCKDIRWT and other SYSGEN parameters on lock manager operation.  

Prerequisites for attendees:
A working knowledge of OpenVMS. Experience programming for OpenVMS is helpful.

Required Skill Level:
Intermediate
Assumes general knowledge of topic, familiarity w/basic terms & procedures

                                                                                                                                                                           

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