During the creation of a , you are asked to define the properties for the , including:
Estimating Life Expectancy
Note:
Use this procedure as a guide. You should re-evaluate the life expectancy of a flashcopy repository logical drive periodically.You can now estimate the total time (Tr) that the repository is available for copy-on-write data based on the current usage. Multiply the elapsed time (t) by the available capacity (Ct), and divide the resulting number by the capacity used (Cu).
Tr = (t*Ct)/Cu
In the equation, Tr is the total time available, t is the elapsed time, Ct is the available capacity, and Cu is the used capacity.
Note:
The Total Time Available (Tr) indicates the total usage time for the flashcopy repository logical drive.Based on the results, you should now be able to make an informed decision on whether you should increase the capacity of the flashcopy repository logical drive. If the repository capacity will become 100 percent full during the expected lifetime of the flashcopy, you should increase the capacity of the flashcopy repository logical drive. For more information, refer to the Increasing the Capacity of a FlashCopy Repository Logical Drive online help topic.