HP XP P9000 Performance Advisor Software - Manual (Page 189)

• PORTs = Total number of ports for an XP or a P9000 disk array
• Ldev_Collection_frequency = Collection frequency for LDEVs (in seconds)
• Port_Collection_frequency = Collection frequency for ports (in seconds)
• Dkc_Collection_ frequency = Collection frequency for DKC (in seconds)
• Ldev_Space ( per Ldev) = 0.0002 MB
• Port_Space (per port) = 0.00008 MB
• Dkc_Space (per collection) = 0.0002 MB
• SECONDS_PER_DAY = 86400
The consolidated free space that is available for P9000 Performance Advisor is the total sum of the
free space available on all the XP and the P9000 disk arrays monitored by P9000 Performance
Advisor.
Example 1. Determining the disk space requirements for P9000 Performance Advisor
Consider that the P9000 and the XP disk arrays, P9500 and XP24000 are monitored by the P9000
Performance Advisor management station.
• P9500 Disk Array details:
• LDEVs = 1703
• PORTs = 96
• Dkc_Collection_frequency = 300 seconds (5 * 60)
• Ldev_Collection_frequency = 600 seconds (10 * 60)
• Port_Collection_frequency = 600 seconds (10 * 60)
Free_Space on P9500 Disk Array = [(86400/600) *1703 * 0 .0002] + [(86400/ 600)
* 96 * 0.00008] + [(86400/300) * 0.0002] = 49.04 + 1.1 + 0.05 = 50.19 MB
• XP24000 Disk Array details:
• LDEVs = 2554
• PORTs = 32
• Dkc_Collection_ frequency = 300 seconds (5 * 60)
• Ldev_Collection_ frequency = 900 seconds (15 * 60)
• Port_Collection_ frequency = 600 seconds (10 * 60)
Free_Space on XP24000 Disk Array = [(86400/900) *2554 * 0 .0002] + [(86400/ 600
) * 32 * 0.00008 ]+[(86400/300) * 0.0002] = 49.03 + 0.36 + 0.05 = 49.45
MB
Consolidated free space that is available for P9000 Performance Advisor (MB/day) = 99.64 MB
(50.19 MB + 49.45 MB)
HP StorageWorks P9000 Performance Advisor Software User Guide 189