22
Sun StorEdge 3000 Family Best Practices Manual
• May
2005
Consolidated Server Tips and Techniques
Consider the following tips and techniques when configuring consolidated servers.
■
Consolidated servers have very dynamic storage requirements. Use Ultra320 or
Ultra160 SCSI ports to eliminate potential bandwidth bottlenecks between the
server and RAID array.
■
If most of the server’s resources are used for databases, create a RAID 1 logical
drive using two disks, for log and transaction data. If more RAID 1 capacity is
required in the future, create a new RAID 1 logical drive using two unassigned
disks. Otherwise, use a portion of the RAID 3 logical drive for database storage as
an alternative to a separate, dedicated RAID 1 logical drive.
■
To avoid reduced performance, add extra storage when a LUN reaches 80% full.
■
Balance workloads by assigning the RAID 5 logical drive to one RAID controller
and the RAID 3 logical drive to the other controller. If there is a RAID 1 logical
drive created, assign it to the same RAID controller as the RAID 3 logical drive.
■
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
8
Configuration Details for Consolidated 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 1, 3 and 5
RAID 1, 3 and 5
Drive Configuration
Three LUNs
One spare drive
Three LUNs
One spare drive
