HP XP P9000 Performance Advisor Software - Manual (Page 30)

For more information on generating and installing Meter based Term license, see “ Generating licenses
at the HPAC license key website ” on page 36 and “ Installing licenses ” on page 37.
Meter based Term license requirement
Meter based Term licenses are useful when you want to monitor an additional usable capacity for a
defined duration or when there is an unplanned surge in the usable capacity that might subsequently
reduce. For steady state license requirements, use Permanent licenses. For dynamic license requirements
arising out of varying business needs, use appropriate TB-Days of Meter based Term license.
IMPORTANT:
For the installed TB-Days to function properly, you must install a minimum of 1TB Permanent license.
The following image illustrates the above mentioned cases.
Example scenario 1
Consider that a small-sized company books air tickets online for its customers. The company has one
P9000 disk array of 75TB usable capacity. A Permanent license is installed on 01/01/2010 to
monitor the 75TB usable capacity. Based on the heavy online booking trend during December'09 -
January'10 time frame due to Christmas and New Year celebrations, the company is expecting a
surge in the online booking traffic beginning December'10 and continuing till the end of 1st week of
January'11. The company is confident that at least 50TB additional usable capacity is required during
this time frame (estimated 39 days).
In such cases, the company has two options:
• Generate and install a Meter based Term license, as the 50TB spike in usable capacity is for a
limited duration.
• Generate and install a Permanent license for the 50TB usable capacity.
Because the 50TB usable capacity is required for a short duration, it is economical to install TB-Days
of Meter based Term license. If a Permanent license is installed for the 50TB usable capacity, it is
used only till the first week of January'11, after which it remains unused until the 75TB current usable
capacity increases by 50TB, and is constantly used.
Following is the suggested Meter based Term license configuration:
Generate 1950TB-Days of Meter based Term license to monitor 50TB additional usable capacity for
39 days. The 1950TB-Days are derived based on the following calculation:
50TB * 39 days = 1950TB-Days of Meter based Term license
The following figure illustrates the scenario described.
Managing licenses for XP and P9000 disk arrays 30