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 |
4 | iSCSI storage | iSCSI storage (*2) |
*1: A local disk refers either to a server's internal disk, or to one stored in a storage blade.
*2: When using data disks, use the hardware initiator. As there is a chance that data will be damaged, do not perform collection or distribution of a cloning image using a software initiator.
Information
Configurations 1, 3, and 4 support I/O virtualization.
Server switchover can only be performed on servers that are connected to a single SAN/iSCSI 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 for SAN/iSCSI.
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, the MAC address of NICs, and boot and network configurations. As a result, there is no longer any 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 3.7 Example of a server switchover based on I/O virtualization(when WWNs are switched)
