Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Manual de usuario descargar pdf (Pagina 26)

Sizing the SAN ISL

The location of the remote site often determines the ISL technologies that meet your distance and

performance requirements. The following factors affect the necessary bandwidth:

 Distance—The transmission distance supported by specific link technologies

 Recovery point objective—The acceptable difference between local and remote copies of data

 Bandwidth capacity and peak loads—The effect of application peak loads on bandwidth

For the later, determining the peak load of each protected applications is a rather complex and lengthy

process in large environments. Standard performance monitoring tools, such as Microsoft Perfmon, VMware

ESXTop or HP EVAPerf, can be used to perform these assessments. The principle is to collect hosts, disk

arrays, and applications performance metrics over a period of time. The collected metrics must then be

consolidated and computed to grasp the average and near peak values for the total applications disk write

throughput and finally derive the adequate bandwidth for the ISLs.

To simplify and automate remote replication link bandwidth sizing, you can use HP StorageWorks

Essentials Data Replication Designer (DRD). DRD is a free GUI-based tool that simplifies collection of

application profile data from customer application servers and automatically calculates the size of the link

required for remote replication to meet business requirements. This tool is available for approved HP

partners. For more information about Data Replication Designer, consult your HP representative or Storage

Architect.

Testing

The testing is aimed at validating the configuration of a disaster tolerant solution, using bidirectional data

replication for a mix of applications and workloads that include the following:

 Microsoft Exchange Server 2007 in a Windows Server 2008 environment

 Microsoft SQL server 2008 in a Windows server 2008 environment

 Microsoft Internet Information Service (IIS)

 File server in a Windows server 2003/Windows server 2008 environment

 My SQL *Plus Web front end in a Red Hat Linux 5 environment

Site Recovery Manager is configured with four protection groups protecting 13 virtual machines. Replicated

storage was a mix of Raw Mapped LUNs and VMFS datastores.

Protection Group 1

 Exchange 2007 (1500 mailboxes)

 Three Protected Virtual Machines: Mailbox Server, Client Access, and Hub Transport

 Data replication from Site A to Site B

Virtual Machine Disks

Type

Purpose

LUN

DR group

CAS C:\(40 GB)

VMFS

OS files and application binaries

DR Group 1

Hub C:\(60 GB)

Mailbox C:\(40 GB)

Mailbox E:\(1 TB)

RDM

Exchange Storage Groups 1-7

Mailbox F:\(1 TB)

RDM

Exchange Storage Groups 8-14

Mailbox E:\Logs (140 GB)

RDM

Exchange Logs 1-7

Mailbox F:\Logs (140 GB)

RDM

Exchange Logs 8-14

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 37 38

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