Dell PowerVault 221S Manuel - Sayfa 8

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1. Powervault™ 220S & 221S Storage Enclosure

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS

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Possible:

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Not recommended:

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Web Servers

Web severs are usually high traffic systems where read operations are the most common

disk activity as web pages are requested by users. They can be moderate intranet sites

with minimal traffic internal company traffic or global internet portal sites that receive

hundreds of thousands of users daily. Performance is generally the main concern with

redundancy and data protection being less a concern. For large web sites, usually there

are several web servers responding to client requests and as a result the need for

redundancy and data protection is not as important. Also web servers may not require as

much scalability or disk capacity since website content is relatively static and changes are

usually minor content modifications.

I/O Profile

(Read/Write)

(Sequential/Random)

95/5

Random

Application

Database

Recommended:

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PAGE 8

RAID 5 – Recommended for databases that require maximum storage capacity

and only base data protection and performance.

RAID 50 – Recommended for those solutions that require a balance between

storage capacity and performance.

RAID 1 – Possible solution for small databases which do not require high storage

capacity.

RAID0, Concatenated - Not recommended due to lack of redundancy and data

protection

Note: While these configurations are not recommended, they can be configured

and utilized.

• Table 2-7: Web General IO profile

Bandwidth

Moderate

• Table 2-8: Web RAID Guidelines

Concatenated

Recommended

RAID 10 – Recommended for enterprise web server solutions where availability

and redundancy and performance are the highest priority, usually stand-alone

portal sites that is critical to the organization's business.

Latency

IO Size

Sensitivity

< 64K

Moderate

RAID Level

Not Recommended

VER A02

Growth

Criticality

Rate

Low

High

Possible

11/17/2005