HP StorageWorks P9000 Performance Advisor Software v5.3 User and Troubleshooting Guide (T1789-96322, August 2011)

With 110TB-Days, P9000 Performance Advisor ends the grace period and continues to monitor
the 10TB usable capacity for another five days.
When fractions of a TB of additional usable capacity is monitored and the installed TB-Days are not
sufficient, P9000 Performance Advisor considers it as a capacity violation and enters a grace period
of 60 days. In such a case, if you install the appropriate TB-Days, P9000 Performance Advisor ends
the grace period for that particular P9000 disk array.
Example scenario 8
Consider the following points:
1. A P9000 disk array has a usable capacity of 75TB.
2. A Permanent license is installed on 11/24/2010 to monitor the 75TB usable capacity.
3. Due to a surge in storage requests around 11/30/2010, another 20TB usable capacity is added
for a duration of five days.
4. Because this is a short term unplanned request, it is addressed by installing 100TB-Days of Meter
based Term license on 11/30/2010.
5. As the usable capacity is beyond the Permanent licensed capacity, P9000 Performance Advisor
uses the 100TB-Days of Meter based Term license.
Based on the usable capacity consumed, P9000 Performance Advisor uses the appropriate TB-
Days of Meter based Term license. Following are sample consumptions from day 1 to day 3:
• 11/30/2010: 51.5TB monitored using 52TB-Days
• 12/01/2010: 20.3TB monitored using 21TB-Days
• 12/02/2010: 24.9TB monitored using 25TB-Days
6. As 4TB usable capacity is remaining and only 2TB-Days are available, P9000 Performance Advisor
does the following:
a. Enters 60 days grace period after 1:00 PM on 12/02/2010 and updates the following
fields with the latest TB-Days data:
• License Capacity: Displays 75TB, +2TB-Days
• License Status: Capacity Insufficient
• Term (Days): 0
• End Date: Expired
b. Begins reducing the installed TB-Days by 20TB every day starting from 12/03/2010, which
is shown as follows:
• On 12/03/2010, 2TB-Days are reduced to –18TB-Days
• On 12/04/2010, –18TB-Days are reduced to –38TB-Days
• On 12/05/2010, –38TB-Days are reduced to –58TB-Days
• .
• .
• .
7. The reduction in TB-Days continues till you install the appropriate TB-Days of Meter based Term
license, so that P9000 Performance Advisor does the following:
• Shows positive TB-Days
• Ends the grace period for the particular P9000 disk array
8. So, if you want to install TB-Days on 12/05/2010 for a duration of five days, generate 160TB-
Days of Meter based Term license. Out of the 160TB-Days:
• 60TB-Days (3 days * 20TB) are used to nullify the reduction in installed TB-Days.
Managing licenses for XP and P9000 disk arrays46