Overview of MC/ServiceGuard NFS
Supported Configurations
| Cascading Failover with Three Adoptive Nodes |
| A package may be configured with up to three adoptive nodes. Figure |
| shows this configuration. If Node_A fails, Pkg_1 is adopted by Node_B. |
| However, if Node_B is down, Pkg_1 is adopted by Node_C, and if Node_C is |
| down, Pkg_1 is adopted by Node_D. The adoptive nodes are listed in the |
| package configuration file, /etc/cmcluster/nfs/nfs.conf, in the order |
| in which they will be tried. Note that all four nodes must have access to |
| the disks for the Pkg_1 file systems. |
Figure | Cascading Failover with Three Adoptive Nodes |
Before Failover:
Node_A
Pkg_1 disks
After Failover of Node_A:
Node_B
Node_C
Node_D
Node_A |
| Node_B |
|
|
|
Pkg_1 disks
After Failover of Node_B:
Node_C
Node_D
Node_A
Node_B
Node_C
Node_D
Pkg_1 disks
16 | Chapter 1 |
