Multiple-Site Business Continuity Cluster Solution - Novell BUSINESS CONTINUITY CLUSTERING 1.2 - ADMINISTRATION Administration Manual

Active Site/Passive Site: A primary site in which all services are normally active, and a
secondary site which is effectively idle. The data is mirrored to the secondary site, and the
applications and services are ready to load if needed.
The active/active deployment option is typically used in a company that has more than one large site
of operations. The active/passive deployment option is typically used when the purpose of the
secondary site is primarily testing by the IT department. Replication of data blocks is typically done
by SAN hardware, but it can be done by host-based mirroring for synchronous replication over short
distances up to 10 km.
Figure 1-3
between the sites. BCC uses eDirectory and Identity Manager to synchronize cluster information
between the two clusters.
Figure 1-3
Server
1A
Fibre Channel
Switch

1.4.2 Multiple-Site Business Continuity Cluster Solution

The multiple-site business continuity cluster is a large solution capable of supporting up to four
sites. Each cluster can support up to 32 nodes. Services and applications can do fan-out failover
between sites. Replication of data blocks is typically done by SAN hardware, but it can be done by
host-based mirroring for synchronous replication over short distances up to 10 km.
22 BCC 1.2: Administration Guide for OES 2 SP1 Linux
shows a two-site business continuity cluster that uses storage-based data replication
Two-Site Business Continuity Cluster
geographically separate sites
Building A
Ethernet Switch
Server Server Server
2A 3A 4A
Fibre Channel
Disk Arrays
Cluster Site 1
Two independent clusters at
WAN
eDirectory
IDM
Server
SAN
Disk blocks
Building B
Ethernet Switch
Server Server
1B 2B 3B
Fibre Channel
Switch
Fibre Channel
Disk Arrays
Cluster Site 2
Server
4B