Adaptec 39160 - SCSI Card Storage Controller U160 160 MBps Guía de usuario descargar pdf (Pagina 8)

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02

PAGE 8 11/17/2005

• 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.

Possible:

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

capacity.

Not recommended:

• 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.

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.

• Table 2-7: Web General IO profile

I/O Profile

(Read/Write)

I/O Profile

(Sequential/Random)

Bandwidth IO Size

Latency

Sensitivity

Growth

Rate

Criticality

95/5 Random Moderate < 64K Moderate Low High

• Table 2-8: Web RAID Guidelines

RAID Level

Application

Concatenated 0 1 10 5 50

Database

Recommended Not Recommended Possible

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.

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