Model 

Advantages 

Disadvantages 

Recommended Users 

Asymmetric 

• Simple Configuration

• Backup node is 100 percent reserved

Machine resources are not fully utilized. 

A small service provider with plans to expand in the future 

Symmetric 

• Better use of system resources

• Higher availability

Resource contention on the backup node.  

HA requires fully redundant disks. 

A small corporate deployment that can accept performance penalties in the event of a single server failure 

N + 1 

• Load distribution

• Easy expansion

Management and configuration complexity. 

A large service provider who requires distribution with no resource constraints