HP XP7 PA Software Installation Guide

Table 3 Large XP, P9500 and XP7 disk array configurations
ComponentsRAID Group Data
Collection
Frequency
# LDEVs# Arrays
Managed
Host AgentManagement
Station
LDEVs30 mins65K411
LDEVs45 mins130K821
LDEVs60 mins148K1341
For collecting DKC and the port data, you must set the data collection frequency to 10 minutes.
• To estimate management station's disk volume space required for the HP XP7 Performance
Advisor database:
◦ HP recommends that there be at least a week's historic data available when you are
forecasting using charts or alarms.
◦ Determining disk space requirements:
Use the following formula to determine the disk space requirements for HP XP7 Performance
Advisor on a daily basis. The factors that influence the output are the number of: XP,
P9500 and XP7 disk arrays, LDEVs, ports, and DKC components. Also, the performance
data collection and frequency influence the output.
Free_Space (MB/day for one array) = [(SECONDS_PER_DAY /
Ldev_Collection_frequency) * LDEVs * Ldev_Space ] +
[(SECONDS_PER_DAY / Port_Collection_ frequency) * PORTs *
Port_Space] + [(SECONDS_PER_DAY/ Dkc_Collection_ frequency) *
Dkc_Space]
where:
– Free_Space (MB/day) = Total free disk space (in MB) required for a day
– LDEVs = Total number of LDEVs in an XP, P9000 or an XP7 disk array (includes
journal volumes, pool volumes, external volumes, and so on)
– PORTs = Total number of ports for an XP, P9000 or an XP7 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 required for HP XP7 Performance Advisor is the total
sum of the free space available on all the XP, P9000 and the XP7 disk arrays monitored
by HP XP7 Performance Advisor.
Initial HP XP7 Performance Advisor setup prerequisites 23