HP XP Performance Advisor Software - Manual (Page 38)

Consider the following points:
1. A P9000 disk array has a usable capacity of 50TB.
2. A Permanent license is installed on 11/23/2010 to monitor the 50TB usable capacity.
3. Due to a surge in storage requests around 11/30/2010, another 10TB usable capacity is
added for a duration of five days.
4. Because this is a short term unplanned request, it is addressed by installing 50TB-Days of
Meter based Term license on 11/30/2010.
5. After the installed TB-Days are consumed by 12/04/2010 and extra TB-Days are not added
to monitor the 10TB usable capacity, HP XP P9000 Performance Advisor does the following:
a.
Enters the grace period after 1:00 PM on 12/04/2010 and 0TB-Days are available.
The following fields are updated with the latest TB-Days data:
•
License Capacity: Displays 50TB, 0TB-Days
•
License Status: Capacity Insufficient
•
Term (Days): 0
•
End Date: Expired
b. Begins reducing the installed TB-Days by 10TB every day starting from 12/05/2010:
•
On 12/05/2010, 0TB-Days are reduced to –10TB-Days
•
On 12/06/2010, –10TB-Days are reduced to –20TB-Days
•
On 12/06/2010, –20TB-Days are reduced to –30TB-Days
•
On 12/07/2010, –30TB-Days are reduced to –40TB-Days
•
On 12/08/2010, –40TB-Days are reduced to –50TB-Days
•
On 12/09/2010, –50TB-Days are reduced to –60TB-Days
6. The reduction in TB-Days continues till you install the appropriate TB-Days, so that HP XP P9000
Performance Advisor does the following:
•
Shows positive TB-Days
•
Ends the grace period for that particular P9000 disk array
7. So, if you want to install TB-Days on 12/09/2010 for a duration of five days, generate
110TB-Days of Meter based Term license. Out of the 110TB-Days:
•
60TB-Days (6 days * 10TB) are used to nullify the reduction in installed TB-Days.
•
50TB-Days (5 days * 10TB) is required for HP XP P9000 Performance Advisor to continue
monitoring the 10TB usable capacity for another five days.
With 110TB-Days, HP XP 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, HP XP 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, HP XP 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.
38 Managing licenses for XP and P9000 disk arrays