HP StorageWorks XP Performance Advisor Software v4.6 User and Troubleshooting Guide (T1789-96094, June 2010)

• “Automatically purging data” on page 153
• “Creating and viewing Export DB CSV files” on page 154
• “Archiving data” on page 160
• “Deleting logs for archival and import activities” on page 166
• “Migrating data to another management station” on page 166
Determining disk space requirements
Use the following formula to determine the disk space requirements for XP Performance Advisor on a
day basis. The factors that influence the output are the number of arrays, LDEVs, ports, DKC resources,
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:
• Free_Space (MB/day) = Total free disk space (in MB) required for a day
• LDEVs = Total number of LDEVs of an array (includes journal volumes, pool volumes, external
volumes, and so on)
• PORTs = Total number of PORTs for an 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 XP Performance Advisor is the total sum of the free
space available on all the XP arrays monitored by XP Performance Advisor.
Managing the XP Performance Advisor database170