18
Sun StorEdge 3000 Family Best Practices Manual
• May
2005
Mail Server Tips and Techniques
Consider the following tips and techniques when configuring mail servers.
■
Definitely use two Ultra320 or Ultra160 SCSI ports when connecting the RAID
array to the server for best performance.
■
The recommended configuration for email servers consists of one RAID 3 and one
RAID 5 logical drive. Use the RAID 3 logical drive to store attachments and other
large files and the RAID 5 logical drive to store messages and small files.
■
There is no need for the two logical drives to include similar numbers of disks.
Assign disks as needed to establish the desired amounts of RAID 3 and RAID 5
storage capacity. Assign at least one disk as a spare.
■
Scale storage capacity by adding disks to either the RAID 3 or RAID 5 logical
drive, depending on need.
■
Balance performance by assigning the RAID 3 logical drive to one RAID
controller and the RAID 5 logical drive to the other RAID controller.
■
When connecting a server to the array using two SCSI buses, map each LUN to
one SCSI bus so that they can both be active and have a dedicated path.
TABLE
6
Configuration Details for Mail Servers
Small Configuration
Large Configuration
RAID Enclosures
1
1
JBOD Enclosures
0
1
Number of Controllers
2
2
Number of Disks
12
24
Bus Configuration
Split Bus
Split Bus
Cache Optimization
Random
Random
RAID Levels Used
RAID 3 and 5
RAID 3 and 5
Drive Configuration
Two LUNs
One spare drive
Two LUNs
One spare drive
