HP XP Performance Advisor Software - Manual (Page 168)

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“Archiving data” (page 158)
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“Deleting logs for archival and import activities” (page 164)
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“Migrating data to another management station” (page 164)
Determining disk space requirements
Use the following formula to determine the disk space requirements for HP XP P9000 Performance
Advisor on a day basis. The factors that influence the output are the number of arrays, LDEVs,
ports, DKC components, performance data collection, and collection frequency:
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:
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Free_Space (MB/day) = Total free disk space (in MB) required for a day
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LDEVs = Total number of LDEVs in an XP or a P9000 disk array (includes journal volumes,
pool volumes, external volumes, and so on)
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PORTs = Total number of ports for an XP or a P9000 disk array
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Ldev_Collection_frequency = Collection frequency for LDEVs (in seconds)
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Port_Collection_frequency = Collection frequency for ports (in seconds)
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Dkc_Collection_ frequency = Collection frequency for DKC (in seconds)
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Ldev_Space (per Ldev) = 0.0002 MB
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Port_Space (per port) = 0.00008 MB
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Dkc_Space (per collection) = 0.0002 MB
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SECONDS_PER_DAY = 86400
The consolidated free space that is available for HP XP P9000 Performance Advisor is the total
sum of the free space available on all the XP and the P9000 disk arrays monitored by HP XP P9000
Performance Advisor.
168 Managing the HP XP P9000 Performance Advisor database