Fabric Performance Tuning - HP StorageWorks 64 - SAN Director Switch Planning Manual

Figure 44
connectivity, device locality, and fan-out regions for device connectivity.
11 to 1 Fan-Out Region
11 Total
Servers
Figure 44: Fabric performance tuning
■
SAN High Availability Planning Guide
illustrates performance tuning for a simple fabric using appropriate ISL
6 to 1 Fan-Out Region
11,000 IOPS 9,000 IOPS
TM
TM
PWR
ERR
6,000 IOPS
31
29 27 25
23 21 TM
19 17 15 TM
30 28 13 11 9
26 24 22 7 5
20 18 16 3 1
14 12 PWR
10 8 6 ERR
4 2 0
6 Total
Servers
10 MBps 20 MBps
1,000 IOPS 1,500 IOPS
Interswitch Link
Fabric Connection
Local Tier 1 devices — A video server application with I/O capabilities of 40
MBps and 2,000 IOPS must be connected to the fabric. Because the
application is critical and high bandwidth (in excess of 35 MBps), the server
and associated storage are directly attached to the core director as Tier 1
devices. No ISLs are used for server-to-storage connectivity.
Planning Considerations for Fibre Channel Topologies
Tier 2 Storage
PWR
ERR
Local Tier 1 Devices
2,000 IOPS
40 Mbps
2,000 IOPS
PWR ERR
Tier 2 Servers
3 to 1 Fan-Out Region
6,000 IOPS
TM
PWR
ERR
TM
PWR
ERR
3 Total
Servers
30 Mbps
2,000 IOPS
103