HP XP24000/XP20000 for FlashCopy Mirroring Software User Guide (T5240-96012, November 2011)

Table 40 Referential Examples for Calculating the Number of Resources Required to Create Version 2
Relationships (continued)
Copy PatternsEmulation Type
Copying One
Extent to
Another in the
Same Volume
See (page 67)
Copying Data
in Two
Extents that
Overlap (Two
T-VOLs)
See (page 67)
Copying Data
in Three
Extents that
Overlap (One
T-VOL)
See (page 66)
Copying Data
in Two
Extents that
do not
Overlap (Two
S-VOLs)
See (page 66)
Copying Data
in Two Extents
that do not
Overlap (Two
T-VOLs)
See (page 66)
Copying Data
in Two
Extents that
do not
Overlap (One
T-VOL)
See (page 65)
50100100757550Total
98
2
(49 x 2 =) 98(49 x 3 =) 147(49+49 =) 984949S-VOL3390-M
5
N/A(49+49 =) 984949(49+49 =) 9849T-VOL
9819619614714798Total
1
The maximum number of resources that can be used as an S-VOL is 48. You cannot establish any relationship if 48 resources are
already used in the S-VOL, and if the copy data range of relationships that are already established overlap all the resources.
2
Half is for the copy source extent, and the other half is for the copy target extent.
3
The maximum number of resources that can be used as an S-VOL is 128.
4
The maximum number of resources that can be used as an S-VOL is 400.
5
The maximum number of resources that can be used as an S-VOL is 784.
The number of pairs that can be created is determined by the following formula:
The maximum number of relations that can be established is the largest number that
meets the equations and ( ) 1,048,575, where:
• means the total number of resources that need to be used.
• means the total number of resources available in the storage system.
= 26,176 or 57,600, or 104,768.
If the storage system is an XP24000 Disk Array, can also be 146,688, or
209,600.
For details, see (page 15).
• ( ) means the total number of relationships.
(page 69) shows an example of what happens when 7 relationships are created with 3390-3
volumes and 3 relationships are created with 3390-L volumes (32,769 CYL).
68 Preparing for Version 2 Operations