Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Manual de usuario descargar pdf (Pagina 28)

In our environment, MS Exchange 2007 and Linux virtual machines run at Site A and replicate to Site B.

MS SQL Server 2008, IIS and the file server VMs run at Site B and replicate to Site A Figure 17 shows the

Site Recovery Manager configuration summary for Site A with the local Exchange and Linux protection

groups and the recovery plans for SQL Server and File Servers from site B.

Figure 17. Site A protection groups and Site B recovery plans

Performance testing

This section of the testing aims to characterize the performance overhead attributable to synchronous data

replication.

Microsoft Exchange 2007

We used Microsoft JetStress to exercise the Mailbox server storage. The environment is configured with 14

Exchange storage groups. The JetStress utility identifies the maximum I/O throughput that a given

configuration can sustain. Each test run is set for a period of two hours. To baseline the throughput, the

same JetStress tests are executed with and without data replication.

The disk configuration for the protected and non protected virtual machines is identical. Each configuration

is presented with the same set of Exchange logical unit numbers (LUNs) from the EVA array that uses two

disk groups. There is no physical disk sharing between the two LUNs housing the Exchange databases and

the two LUNs housing the Exchange transaction logs. All EVA LUNs are configured as RAID 1. The virtual

machine boot disk is housed on a shared VMFS volume, while the Exchange data disks use Raw Device

Mapping. Table 2 shows the disk layout.

Table 2. Exchange disk layout

Virtual Machine Disk

Purpose

LUN

C:\(VMFS)

OS files and application binaries

E:\(RDM)

Exchange storage groups 1-7

F:\(RDM)

Exchange storage groups 8-14

E:\Logs (RDM)

Exchange logs 1-7

F:\Logs (RDM)

Exchange logs 8-14

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 37 38

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Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Manual de usuario Pagina 28