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HP OpenVMS Systems Documentation
Content starts here Chapter 8 Host-Based Minimerge (HBMM)
HP Volume Shadowing for OpenVMS: OpenVMS Version 8.4

Chapter 8 Host-Based Minimerge (HBMM)

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Table of Contents

Overview of Full Merge and Minimerge Operations
Merge Resulting from a System Failure
Merge Resulting from Mount Verification Timeout
Merge Resulting from use of SET SHADOW/DEMAND_MERGE
Comparison of Merge and Minimerge Operations
Fast Minimerge and Minicopy Operations
Overview of HBMM
Bitmaps: Master and Local
HBMM Policies
HBMM Policy Specification Syntax
Rules Governing HBMM Policies
Guidelines for Establishing HBMM Policies
Selecting the Systems to Host Master Bitmaps
Considerations for Setting a Bitmap RESET_THRESHOLD Value
Using Multiple Policies
Configuring and Managing HBMM
How to Define an HBMM Policy
How to Assign an HBMM Policy to a Shadow Set
How to Activate HBMM on a Shadow Set
How to Disable HBMM on a Shadow Set
How to Remove a Policy Assignment from a Shadow Set
How to Change a Policy Assignment of a Shadow Set
How to Delete a Named Policy from the Cluster
How to Apply a Changed DEFAULT Policy
How to Display Policies
How to Display the Merge Status of Shadow Sets
How to Prevent Merge Operations on a System
Considerations for Multiple-Site OpenVMS Cluster Systems
Use of /DEMAND_MERGE When HBMM Is Enabled
Visible Impact of Transient State Events
Automatic Minicopy on Volume Processing
Multiuse Property for Host-Based Minicopies
Multiuse Property and DISMOUNT Keyword
Examples of Multiuse and Dismount

This chapter describes minimerge operations, the conditions that cause this operation, and the difference between a minimerge and a full merge operation. It also provides the various policies and qualifiers associated and the guidelines for using HBMM. This chapter includes the following topics/sections:

  • Overview of full merge and minimerge operations

  • Overview of host-based minimerge (HBMM)

  • HBMM policy specification syntax

  • Rules governing HBMM policies

  • Guidelines for establishing HBMM policies

  • Configuring and managing HBMM

  • Use of /DEMAND_MERGE when HBMM is enabled

  • Visible impact of transient state events



Guidelines for Using a Shadow Set Member for Backup
  		 


Overview of Full Merge and Minimerge Operations