Dell PowerVault MD1 Series Handbuch für die Optimierung - Seite 39
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A REFERENCE GUIDE FOR OPTIMIZING DELL™ POWERVAULT™ MD1XXX FAMILY SAS SOLUTION
8. Summary and Conclusions
It is important to understand the characteristics of each storage component in order to assess the
performance of the overall application. It is also necessary to understand how the storage
component is configured since this has a direct impact on the effectiveness of an application. Table
26 summarizes typical storage recommendations for various applications. Recommendations listed
in the table are general conclusions and the actual storage solution may have additional factors
which need to be considered before determining an optimal solution. Additional factors could
include:
•
Data and power back-up strategies of an Enterprise IT
•
Storage deployment environment:
o
o
•
Storage deployment budget
•
Long term storage consolidation strategy
Table 26: Typical Storage Recommendation for Different Storage Applications
Application
Servers
Key Parameters
Availability
Email
Performance
Scalability
Availability
Database
Performance
Web
Performance
On-line
High Availability
Transaction
File
Scalability
Streaming
Performance
Media
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Number of active and passive users
Type of data – mission critical or non-mission critical
Storage Recommendations
PowerVault
RAID Level
MD1000
RAID 10 provides
Daisy-chaining
both availability
provides capacity
and performance
scalability
RAID 10 provides
Daisy-chaining
both availability
provides capacity
and performance
scalability
Split Topology
spanning RAID 0
RAID 0 in Web
across channels
Server farms
provides better
provides maximum
performance if
performance of all
daisy-chaining for
RAID levels
additional capacity
is not required
RAID 10
Daisy-chaining
provides highest
provides capacity
availability of all
scalability
RAID levels
RAID 5
Daisy-chaining
maximizing
provides capacity
storage with some
scalability
data protection
Split Topology
spanning RAID 0
RAID 0
across channels
provides maximum
provides better
performance of all
performance if
RAID levels
daisy-chaining for
additional capacity
is not required
VER A02
Remarks
Host Controller
For added
Recommendation targets
performance enable
a typical enterprise e-mail
Write back cache
Server
Performance
For added
requirements for database
performance enable
servers depend on
Write back cache
number of users
Web server farms, usually
Enable read ahead
have multiple servers
capabilities for
providing replicated web
added performance
data. Thus, data
boost
availability is handled at
server level
Recommendation targets
Enterprise applications
which require higher
For added
availability than
performance enable
performance.
Write back cache
In general for all OLTP,
data protection is of
utmost importance
These servers usually
Enable Global Hot
have data backed up
Spare for improved
periodically and hence,
availability for RAID
require minimum data
5
protection from storage
components
Performance is of utmost
importance for Streaming
Enable read ahead
servers. Data on these
capabilities for
servers is usually backed
added performance
up on external media such
boost
as tape libraries or optical
media - CD/DVD
6/16/2008