Best Practice; Sample Configurations - HP StoreVirtual 4000 Configuration Manual

In addition to setting up the Multi-Site clusters for data replication, it is important to set up the SAN
managers for quorum correctly to ensure that in the event of a failure the system can be properly
recovered. Maintaining quorum can be either an automated process or manually recovered by an
Administrator.
Table 2 Common configurations of Multi-Site SANs
Number of sites
Three physical sites
Two physical sites,
with logical third site
Three physical sites
Two physical sites

Best practice

In a cluster that spans multiple sites, run the same number of managers in each site. In a cluster
that spans two sites, run a Failover Manager in a third site (physical or logical) that is not included
in the cluster
which one site is configured as primary
managers in the primary site.

Sample configurations

The following diagrams illustrate the best practices for four different configurations.
Figure 10 Three physical sites: cluster spans two sites, Failover Manager in third site
1. Volumes are configured with Network RAID- 1 0
Table 2 (page 13) summarizes common Multi-Site SAN and manager configurations.
Cluster/site setup
Cluster spans two sites
Cluster spans two sites
Cluster spans three
sites
Cluster spans two sites
(Figure 10 (page 13)). The one exception to this rule is the two-site configuration in
Configuring sites and managers to achieve optimal high availability and redundancy
Total number of Failover Manager
managers of all types
Min = three In the third site
Max = five
Min = three In the logical third site
Max = five
Min = three Not used
Max = five
Min = three Not used
Max = five
(Figure 13 (page 15)). In this case, run a majority of the
Site types
All sites are peer.
All sites are peer.
All sites are peer.
One site is designated
primary.
13