Chapter 2 Design

This chapter explains how to design disaster recovery in Resource Orchestrator.

Table 2.1 Design Items of Disaster Recovery
Main Items	Reference
Switchover method	Refer to "2.1 Switchover Methods".
Switchover operations	Refer to "2.2 Switchover Operations".
Switchover levels	Refer to "2.3 Switchover Levels".
Limitation of switchover scope and additional recovery	Refer to "2.4 Limitation of Switchover Scope and Additional Recovery".
Configuration for blade chassis degradation	Refer to "2.5 Degrading Blade Chassis".
Configurations	Refer to "2.6 Configurations of the Switchover Source and Destination Sites".
Licenses	Refer to "2.7 Necessary Licenses".
Estimation of capacity of disks that will be replicated	Refer to "2.8 Estimation of Disk Capacity".
Estimation of capacity of disks that will not be replicated	Refer to "2.8 Estimation of Disk Capacity".
Advisory notes for Disaster Recovery environments	Refer to "2.9 Advisory Notes for Disaster Recovery Environments".
System configuration	Refer to "2.10 Example of System Configuration".

The combinations of switchover methods, switchover operations, and switchover units supported by DR Option are as follow:

Table 2.2 Combinations of Switchover Methods, Switchover Operations, and Switchover Units
Switchover Method	Switchover Operations	Switchover Levels	Support Availability
"Physical L-Server switchover (physical OS)"	Active-Active operation	Site switchover	No
	Active-Active operation	Tenant switchover	Yes
	Active-Standby operation	Site switchover	Yes
	Active-Standby operation	Tenant switchover	Yes
"Physical/virtual L-Server switchover (VM host/VM guest)"	Active-Active operation	Site switchover	No
	Active-Active operation	Tenant switchover	No
	Active-Standby operation	Site switchover	Yes
	Active-Standby operation	Tenant switchover	No
"Virtual L-Server switchover (VM guest)"	Active-Active operation	Site switchover	No
	Active-Active operation	Tenant switchover	Yes
	Active-Standby operation	Site switchover	Yes
	Active-Standby operation	Tenant switchover	Yes

The combinations of physical servers and the DisasterRecovery function supported by DR Option are as follow:

Table 2.3 Combinations of Physical Servers and the DisasterRecovery Function
Function		PRIMERGY Blade Server	PRIMERGY Rack Mount Server
Switchover method	Physical L-Server Switchover	Yes	Yes
	Physical/Virtual L-Server Switchover	Yes	Yes
	Virtual L-Server Switchover	Yes	Yes
Switchover operations	Active-Standby operation	Yes	Yes
Switchover operations	Active-Active operation	Yes	Yes
Switchover levels	Site switchover	Yes	Yes
Switchover levels	Tenant switchover	Yes	Yes
Limitation of switchover scope and additional recovery	Limitation of switchover scope	Yes	Yes
Limitation of switchover scope and additional recovery	Additional Recovery	Yes	Yes
Configuration for blade chassis degradation		Yes	-
Switchover target	Virtual L-Servers	Yes	Yes
	Virtual L-Servers linked with virtual servers	Yes	Yes
	Physical L-Servers	Yes	Yes
	Physical L-Servers linked with physical servers	No	No
	L-Servers with definitions only	No	No