Understanding and Designing Serviceguard Disaster Recovery Architectures

ManualsBrandsHP ManualsSoftwareHP Metrocluster with 3PAR Remote Copy E-LTU

Contents

1 Disaster Recovery in a Serviceguard Cluster...................................................6

Evaluating the Need for Disaster Recovery...................................................................................6

What is a Disaster Recovery Architecture?...................................................................................6

Understanding types of disaster recovery clusters..........................................................................8

Disaster Recovery Architecture Guidelines....................................................................................9

Protecting Nodes through Geographic Dispersion....................................................................9

Protecting Data through Replication........................................................................................9

Offline Data Replication...................................................................................................9

Online Data Replication.................................................................................................10

Physical Data Replication...........................................................................................10

Logical Data Replication............................................................................................12

Ideal Data Replication...............................................................................................13

Using Alternative Power Sources..........................................................................................14

Creating Highly Available Networking.................................................................................14

Disaster Recovery Local Area Networking.........................................................................15

Disaster Recovery Wide Area Networking........................................................................16

Cross-subnet configuration .............................................................................................17

Disaster Recovery Cluster Limitations..........................................................................................18

Managing a Disaster Recovery Environment...............................................................................18

2 Metrocluster and Continentalclusters............................................................20

Understanding Metrocluster......................................................................................................20

Metropolitan Cluster...........................................................................................................20

Terms and Concepts...........................................................................................................21

Arbitration....................................................................................................................21

Cluster Quorum............................................................................................................21

Arbitrator Nodes...........................................................................................................22

Quorum Server.............................................................................................................22

General Requirements........................................................................................................22

Types of Configuration........................................................................................................22

Two Data Centers and Third Location with Arbitrators or a Quorum Server System.................22

Features of Metrocluster......................................................................................................24

Metrocluster across subnets.............................................................................................24

SADTA.........................................................................................................................25

Site Aware Failover Configuration...................................................................................25

Volume Monitor Configuration........................................................................................25

Benefits of Metrocluster.......................................................................................................26

Understanding Continentalclusters.............................................................................................27

Continental Cluster.............................................................................................................27

Terms and Concepts...........................................................................................................28

Continentalclusters.........................................................................................................28

Primary and Recovery Clusters........................................................................................28

Recovery Group............................................................................................................28

Monitoring Package......................................................................................................28

Cluster Events and notifications.......................................................................................28

Notifications Methods...............................................................................................28

Types of Cluster Events..............................................................................................29

Manual Recovery..........................................................................................................29

Types of Configuration........................................................................................................29

Basic configuration........................................................................................................29

Bi-directional / Mutual Recovery configuration..................................................................30

N-1 configuration..........................................................................................................30

Contents 3