Dell PowerVault MD1000 SAS Solution Manual page 34

A REFERENCE GUIDE FOR OPTIMIZING DELL™ MD1000 SAS SOLUTIONS
Performance
Web Performance
On-line High Availability
Transaction
Scalability
File
Streaming Performance
Media
PAGE 34
both availability provides capacity
and performance scalability
RAID 0 in Web Split Topology
Server farms spanning RAID 0
provides maximum across channels
performance of all provides better
RAID levels performance if
daisy-chaining for
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
RAID 0 Split Topology
provides maximum spanning RAID 0
performance of all across channels
RAID levels provides better
performance if
daisy-chaining for
additional capacity
is not required
VER A00
performance enable requirements for database
Write back cache servers depend on
number of users
Enable read ahead Web server farms, usually
capabilities for have multiple servers
added performance providing replicated web
boost data. Thus, data
availability is handled at
server level
For added Recommendation targets
performance enable Enterprise applications
Write back cache which require higher
availability than
performance.
In general for all OLTP,
data protection is of
utmost importance
Enable Global Hot These servers usually
Spare for improved have data backed up
availability for RAID periodically and hence,
5 require minimum data
protection from storage
components
Enable read ahead Performance is of utmost
capabilities for importance for Streaming
added performance servers. Data on these
boost servers is usually backed
up on external media such
as tape libraries or optical
media - CD/DVD
5/06/2005