Novell BUSINESS CONTINUITY CLUSTERING 1.2.1 - ADMINISTRATION, Руководство администратора, Страница: 21 / 184

Overview of Business Continuity Clustering 21
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The business continuity cluster configuration information is stored in eDirectory. eDirectory schema
extensions provide the additional attributes required to maintain the configuration and status
information of BCC enabled cluster resources. This includes information about the peer clusters, the
cluster resources and their states, and storage control commands.
BCC is an integrated set of tools to automate the setup and maintenance of a business continuity
infrastructure. Unlike competitive solutions that attempt to build stretch clusters, BCC uses a cluster
of clusters. Each site has its own independent clusters, and the clusters in each of the geographically
separate sites are each treated as “nodes” in a larger cluster, allowing a whole site to do fan-out
failover to other multiple sites. Although this can currently be done manually with a cluster of
clusters, BCC automates the system by using eDirectory and policy-based management of the
resources and storage systems.
Novell Business Continuity Clustering software provides the following advantages over typical
cluster-of-clusters solutions:
Š
Supports up to four clusters with up to 32 nodes each.
Š
Integrates with shard storage hardware devices to automate the failover process through
standards-based mechanisms such as SMI-S.
Š
Uses Identity Manager technology to automatically synchronize and transfer cluster-related
eDirectory objects from one cluster to another.
Š
Provides the capability to fail over as few as one cluster resource, or as many as all cluster
resources.
Š Includes intelligent failover that allows you to perform site failover testing as a standard
practice.
Š
Provides scripting capability that allows enhanced storage management control and
customization of migration and fail over between clusters.
Š
Provides simplified business continuity cluster configuration and management by using the
browser-based Novell iManager management tool. iManager is used for the configuration and
monitoring of the overall system and for the individual resources.
1.4 BCC Deployment Scenarios
There are several Business Continuity Clustering deployment scenarios that can be used to achieve
the desired level of disaster recovery. Three possible scenarios include:
Š
Section 1.4.1, “Two-Site Business Continuity Cluster Solution,” on page 21
Š
Section 1.4.2, “Multiple-Site Business Continuity Cluster Solution,” on page 22
Š
Section 1.4.3, “Low-Cost Business Continuity Cluster Solution,” on page 23
1.4.1 Two-Site Business Continuity Cluster Solution
The two-site business continuity cluster deploys two independent clusters at geographically separate
sites. Each cluster can support up to 32 nodes. The clusters can be designed in one of two ways:
Š
Active Site/Active Site: Two active sites where each cluster supports different applications
and services. Either site can take over for the other site at any time.