Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Manual de usuario descargar pdf (Pagina 4)

information about alternative methods, see “Plan and Configure availability within an Office

SharePoint Server farm.” During testing, recrawling content is accomplished in 40 minutes.

SQL Server back end

CLX EVA integrates with Microsoft Cluster Service and CA EVA to automate failover and failback of

the SQL Server backend. This dual integration enables the cluster service to verify the status of the

storage and the server cluster, which allows the correct failover and failback decisions to be made.

Doing so minimizes downtime and accelerates recovery without human intervention.

The integration between these products provides the following performance benefits:

 Near instantaneous data replication

 Read/write enabling of remotely mirrored storage

 LUN presentation/mapping changes during failover

 Extensive condition checking by monitoring and recovering disk pair synchronization on an

application level.

This paper documents the following test results.

 Converting an existing MOSS farm into a two-site disaster tolerant farm, as described in Test

Environment.

 Validating disaster tolerance of the MOSS environment, as described in Disaster tolerance

Scenarios.

 Validating disaster recovery of the MOSS environment, as described in Disaster recovery.

Test environment

Note: This is not a reference configuration, only a proof of

concept.

This section describes the test environment designed to implement the solution. The servers and

storage meet the requirements for the test scenario; however, based on HP ProLiant Sizer for Microsoft

Office SharePoint Server 2007 and guidance from Microsoft, the following two test-environment

elements may not be appropriate for a particular production implementation:

 The test environment uses Ethernet to simulate intersite WAN links.

o Intersite link bandwidth affects the recovery time objective (RTO) of the environment. The RTO

is the length of time the business can afford to spend returning an application to operation. It

includes the time required to detect the failure, to fail over the storage, and to restart the

application on a new server.

o For more information about choosing an appropriate intersite link, see the HP StorageWorks

Continuous Access EVA implementation guide.

o HP provides detailed guidance for designing the replication links and best practices for

replication performance tuning. For more information, see the High availability for SQL

Server 2005 using array-based replication and host-based mirroring technologies white

paper.

 The test environment uses Windows 2008 network load balancing for WFEs.

o Depending on business requirements, alternatives for load balancing WFEs include using a

hardware load balancer or using virtual machines for the WFEs. Either one can be

implemented as part of this solution.

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Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Manual de usuario Pagina 4