HP StorageWorks Storage Mirroring for Linux User's Guide (T2558-96078, February 2008)
Chapter 11: Failover ..............................................................................................................11-1
The Failover Process ..............................................................................................................11-1
The Failback Process .............................................................................................................11-1
Failover Terminology .............................................................................................................11-2
How Failover Works ..............................................................................................................11-2
How Failback Works ..............................................................................................................11-3
How Failure Detection Works ..............................................................................................11-4
Client Connectivity ................................................................................................................11-4
Failover Hardware Configurations .......................................................................................11-5
Single NIC on the source and target ...............................................................................................................................................11-5
Multiple NICs on the source and single NIC on the target .......................................................................................................11-5
Multiple NICs on the source and target .........................................................................................................................................11-6
Failover Options .....................................................................................................................11-7
Managing Failover Through the Failover Control Center .................................................11-8
Configuring monitoring and failover .................................................................................................................................................11-8
Monitoring failover .............................................................................................................................................................................11-11
Initiating failback ..................................................................................................................................................................................11-12
Communication ports ........................................................................................................................................................................11-14
Failover Control Center window refresh rate ............................................................................................................................11-14
Testing failover ....................................................................................................................................................................................11-15
Failover manual intervention ............................................................................................................................................................11-15
Managing Failover Through the Text Client .....................................................................11-16
Configuring monitoring and failover ...............................................................................................................................................11-16
Testing failover ....................................................................................................................................................................................11-23
Initiating failback ..................................................................................................................................................................................11-24
Chapter 12: Restoration ........................................................................................................12-1
How the Restoration Process Works .................................................................................12-2
Restoration Options ...............................................................................................................12-3
Restoring Storage Mirroring Data Through the Management Console ..........................12-5
Restoring Storage Mirroring Data Through the Text Client ............................................12-7
Automating Restore ..............................................................................................................12-9
Chapter 13: Monitoring Tools ...............................................................................................13-1
Management Console Statistics ............................................................................................13-2
At-a-Glance Monitoring .........................................................................................................13-5
Customizing when the background color and icons change ......................................................................................................13-8
Management Console Message Window .............................................................................13-9
Text Client main window ....................................................................................................13-11
DTCL status command .......................................................................................................13-12
Linux System Log .................................................................................................................13-13
DTStat ...................................................................................................................................13-23
DTStat log file ......................................................................................................................................................................................13-23
Running DTStat ...................................................................................................................................................................................13-26
DTStat statistics ..................................................................................................................................................................................13-28