Dell PowerVault 221S Manual - Halaman 10
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A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS
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Possible:
•
Not recommended:
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Note: While these configurations are not recommended, they can be configured and
File Servers
File servers can be archival long term storage repositories or more dynamic user file
storage where files are changed, added and deleted on a daily basis. They can range
from workgroup to company level in their scope. A key factor for file servers is storage
capacity as users add more files. File servers are generally not mission critical systems so
reduced availability and redundancy or none at all is acceptable as the data is usually
backed up and can be restored in a matter of hours.
Archival file server characteristics and recommendations
I/O Profile
I/O Profile
(Read/Write)
(Sequential/Random)
90/10
Sequential
Application
File -
Archival
Recommended:
•
•
•
Possible:
PAGE 10
RAID 50 – Recommended for those solutions that require a balance between
storage capacity and performance.
RAID 1 – Possible solution for situations which do not require high storage
capacity.
RAID 0, Concatenated - These are not recommended due to lack of
redundancy and data protection.
utilized.
• Table 2-11 Archival File Server General I/O profile
Bandwidth
Moderate
• Table 2-12: Archival File Server RAID Guidelines
Concatenated
Recommended
RAID 10 – Recommended due to the high availability and redundancy and
good performance.
RAID 5 – Recommended for file servers 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.
Latency
IO Size
Sensitivity
>64K
High
RAID Level
0
1
10
Not Recommended
VER A02
Growth
Criticality
Rate
Varies
Low
5
50
Possible
11/17/2005