Define the storage configuration required for the system.
Resource Coordinator VE supports the following configurations.
Configuration | System disk | Data disk(s) |
|---|---|---|
1 | SAN storage | SAN storage |
2 | Local disk (*1) | Local disk (*1), NAS |
3 | Local disk (*1) | SAN storage |
*1: A local disk refers either to a server's internal disk, or to one stored in a storage blade.
Information
Configurations 1 and 3 support I/O virtualization.
A server switchover can be performed only on servers that are connected to a single SAN storage system.
Resource Coordinator VE does not support a server's switchover when it is connected to multiple SAN storage systems.
A SAN storage system can be used as a shared cluster disk.
However, a server which is defined in a cluster cannot be switched over.
Resource Coordinator VE supports both single path and multi-path storage connections.
Functions Provided by Resource Coordinator VE
The I/O virtualization features available with Resource Coordinator VE allow spare servers to inherit the WWN of Primary Servers. As a result, there is no more need to reconfigure the storage devices connected to the involved servers.
Note that WWN is a general term for both WWNN and WWPN. WWNN stands for node name and WWPN stands for port name.
The following example shows how server switchovers occur.
Figure 3.6 Example of a server switchover based on I/O virtualization
