m2-how to design a san

8/11/2019 M2-How to Design a SAN

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© 2004 Hewlett-Packard Development Company, L.P.

The information contained herein is subject to change without notice

Designing and

Implementing HPSAN Storage Solution

Module 2

How to design a networked storage



Objectives

– Identify the basics of designing a FC Fabric SAN

– Define the infrastructure requirements

– Explain how to design a SAN utilizing a phasedapproach

– Identify the factors to consider when designing a SAN

– Explain how performance considerations relate to SANdesign

– Explain HP SAN Design philosophy



Basics of designing a SAN

Restorebackup

Distance

CostDisastertolerance

Connectivity

and capacity

Data locality

Scalability

Performance

Availability

Managementand security



HP SAN Design philosophy

– To mix moderately sized components to meet a rangeof storage system requirements

– Benefits• Greater flexibility

•

Incremental scaling• Support for diverse geographic and data locality requirements

– Achieved through – Multiple port functionality

– Simple, standardized approach to design



Approaches to simplified design

– HP standard design• For beginners or small business needs

– Variation of an HP design• For intermediate SAN designers or mid-size business needs

– Custom design using the HP StorageWorks SANdesign rules• For advanced SAN designers or enterprise business needs



Design considerations

– Factors to consider when designing a FC Fabric SAN• Applications and operating systems

• Availability

• Accessibility

• I/O Profile

• Backup

• Security

• Migration

• Management



Defining the infrastructurerequirements

– Document the following:• Inventory of current environment

• Growth plan

• Current storage configuration

• LAN/SAN structure

• Application uses

• Traffic loads

• Peak periods

• Current performance

– Current constraints• Use of existing cables

• Use of existing components



Planning considerations

Perform SANarchitecture

and situation

assessment

ExamineSAN

functionality

Documentavailability

requirements

Documentperformance

requirements

Document SANdata protection

& growth

Document SANmanagement

requirements

Select HPsupported SAN

Topologies

DocumentDeployment

Strategy



Planning the SAN

– Plan the SAN architecture

– Plan for current environment assessment

– Plan for SAN functionality, availability, and performance

– Plan for SAN data protection and growth

– Plan for enterprise SAN management

– Choose HP supported SAN topology

– Plan the deployment strategy

– Plan the test and verification process

– Develop a detailed deployment schedule and aschedule tracking process

– Plan to have a customer development lab to testconfiguration changes



Planning the SAN

– Define ongoing support requirements and expectedservice response times

– Agree to a mutual sign-off procedure before beginningthe production deployment

–

Topology design – SAN management strategy

– SAN management processes

– Experience level

–

Technology advances – Deployment strategy



Performance considerations

Application Bandwidth

Utilization

Read/Write Max Typical Access Typical I/O Size

OLTP, e-mail, UFS

e-commerce, CIFS

Light 80% read

20% write

Random 8KB

OLTP (raw) Light 80% read

20% write

Random 2KB to 4KB

Decision support,

HPC, seismic,

imaging

Medium to Heavy 90% read

10% write (except

during “builds”)

Sequential 16KB to 128KB

Video Server Heavy 98% read2% write

Sequential > 64KB

SAN applications:

serverless backup,

snapshots, third-

party copy

Medium to Heavy Variable Sequential > 64KB



Solution design and complexities

– Understand concepts

– Understand products and rules

– Combine products

– Storage rules

–

Operating system rules – Fabric rules

– Zoning rules

– Other rules• Number of switches supported

• Types of switches supported• Maximum number of hops supported

• Domain IDs and Worldwide Names needed

• Number of ISLs supported

– Apply most restrictive rules first



Learning

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