Hitachi G1000 - Page 21

GAD solution
Software
System configuration
Alternate
path
software
Cluster
software
• Continuous server I/O (if
a failure occurs in a
storage system)
• Migration of a virtual
storage machine of a
server without using the
storage systems
Single-server configuration
In a single-server configuration, the primary and secondary storage systems
connect to the host server at the primary site. If a failure occurs in one
storage system, you can use alternate path software to switch server I/O to
the other site.
Server-cluster configuration
In a server-cluster configuration, servers are located at both the primary and
secondary sites. The primary system connects to the primary-site server, and
the secondary system connects to the secondary-site server. The cluster
software is used for failover and failback. When I/O on the virtual machine of
one server increases, you can migrate the virtual machine to the paired
server to balance the load.
Overview of global-active device
1-7
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide