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Exchange environments

Exchange environments are defined by size and load. Size is measured in numbers of users, and

load is defined as the number of I/O per second per user.

• Small environments are less than 1,000 users.

• Medium environments have 1,000 to 5,000 users.

• Large environment have greater than 5,000 users.

• Light loads are less than .18 IOPS (OWA and POP3) per user.

• Medium loads consist of .4 to 1 IOPS (Outlook Rich Client) per user.

• Heavy loads consist of greater than .75 IOPS (Outlook Rich Client) per user.

Table 13 provides the recommended storage system configuration based on the Exchange

environment and workload. The configurations are defined in the section “S.”

Table 13. Storage system configuration for various Exchange environments and

workloads

Small

environments

Medium

environments

Large environments

Light loads Small configuration Medium configuration Large configuration

Medium loads Medium configuration Large configuration Large configuration

Heavy loads Tuning required* Tuning required* Tuning required*

* These are exceptions.

Consult the EMC Dell/EMC CX Series Storage Solutions Microsoft Exchange 2003 Best

Practices white paper for additional details.

DISK-ARRAY ENCLOSURE (DISK SHELVES)

Availability

Scaling is accomplished on the Dell/EMC CX Series by adding DAEs. DAEs can be added while

the system is running, but if possible, EMC recommends shutting down the attached hosts to the

system when making hardware changes to the environment. Hardware changes should be

coordinated with EMC service.

Drive types per DAE

Only one type of drive— either Fibre Channel, SATA-II or ATA—can reside in a specific DAE.

The first DAE must have only FC drives.

Drives per DAE

A DAE supports up to 15 drives. EMC does not require any drives in a DAE, other than in the first

DAE. EMC recommends a minimum of four drives per DAE.

Drive types per storage system

EMC recommends matching the drive type to the type of application environment. The first tray

must contain Fibre Channel drives.

Dell/EMC CX Series Initial Configuration

Best Practices Planning 31

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