HP Serviceguard Extended Distance Cluster for Linux A.12.00.00 Deployment Guide, March 2014

Contents
Printing History ............................................................................................5
Preface........................................................................................................7
1 Disaster Recovery in a Serviceguard Cluster...................................................9
1.1 Evaluating the Need for Disaster Recovery Solution..................................................................9
1.2 What is a Disaster Recovery Architecture?..............................................................................9
1.3 Understanding Types of Disaster Recovery Clusters................................................................11
1.3.1 Extended Distance Clusters..........................................................................................11
1.3.2 Metrocluster..............................................................................................................12
1.3.3 Continental Cluster.....................................................................................................12
1.4 Managing a Disaster Recovery Solutions..............................................................................12
1.5 Additional Disaster Recovery Solutions Information................................................................13
2 Building an Extended Distance Cluster Using Serviceguard and Software
RAID.........................................................................................................15
2.1 Typical Configuration of an Extended Distance Clusters..........................................................15
2.2 Types of Data Link for Storage and Networking....................................................................17
2.3 Two Data Center and Quorum Service Location Architectures..................................................17
2.4 Guidelines for Separate Network and Data Links..................................................................18
2.5 Guidelines on DWDM Links for Network and Data................................................................18
3 Configuring your Environment for Software RAID..........................................21
3.1 Understanding Software RAID.............................................................................................21
3.2 Prerequisites.....................................................................................................................21
3.3 Configuring the Storage Environment...................................................................................21
3.3.1 Configuring the Storage..............................................................................................21
3.3.1.1 Setting the Value of the Link Down Timeout Parameter..............................................22
3.3.1.2 Configuring Single Path to Storage.......................................................................22
3.3.1.3 Configuring Multiple Paths to Storage....................................................................22
3.3.2 Using Persistent Device Names....................................................................................22
3.3.3 Creating a Multiple Disk Device..................................................................................23
3.3.3.1 Creating and Assembling an MD Device...............................................................24
3.3.4 Creating Volume Groups and Configuring VG Exclusive Activation on the MD Mirror.........25
3.3.5 Configuring the VxVM Diskgroups...............................................................................26
3.3.5.1 Limitations.........................................................................................................27
4 Configuring the Serviceguard Cluster..........................................................29
5 Configuring Packages for Extended Distance Cluster Software........................31
5.1 Creating a serviceguard-xdc Modular Package.....................................................................31
Contents 3