HP XP P9500 Storage - Manual (Page 39)

Σ(α) means the total number of resources that need to be used,
(β) means the total number of resources available in the storage system,
(β) = 26,176 or 104,768, or 209,600.
For details, see Table 20 (page 34) .
And Σ(γ) stands for the total number of relationships.
The following figure shows seven relationships that are created with 3390-3 volumes, and three
relationships that are created with 3390-L volumes (32,769 CYL).
Figure 27 Reference example for calculating the number of relationships
As shown in this figure, the total number of resources used per pair is calculated as:
Resources used for A - I = (9 + 3) + 3 + 3 + 3 + 3 + 3 + (25 x 3) + 25 + 25 = 152.
The conditions for the number of relationships you can create are:
Σ(α) ≤ (β) and Σ(γ) ≤ 1,048,575
In the case of the example shown in the figure, Σ(α) ≤ (β) is:
•
54 ≤ 26,176 or 104,768, or 209,600.
While Σ(γ) ≤ 1,048,575 is:
•
10 ≤ 1,048,575.
Since the example shown in the figure above meets the conditions shown above, you can establish
all of the relationships in that figure.
Calculating the maximum number of Compatible FlashCopy relationships 39