Hewlett Packard Enterprise HPE XP7, User Manual, Page: 68 / 311

Also, if you you split pairs twice, the maximum number of FS pairs you can create in the snapshot tree is
the same, and the FS pair capacity remains unchanged.
More information
Calculating the number of Fast Snap pairs based on pair tables on page 64
Calculating Fast Snap pairs based on the snapshot estimated manageable capacity on page 64
Calculating Fast Snap pairs based on cache management devices on page 65
Calculating the number of cache management devices on page 66
Calculating and assigning pool capacity on page 69
External Storage and external volumes used as pool-VOLs on page 71
Simultaneous processing of multiple Fast Snap pair tasks on page 71
Pair operations when pairs are cascaded on page 72
Pair operations when pairs are not cascaded on page 83
Pair operations when a P-VOL is shared by multiple S-VOLs on page 84
Data recovery and backup differences between Fast Snap and Business Copy on page 85
Fast Snap cache management device requirements on page 68
Fast Snap cache management device requirements
The following table shows the cache management device requirements for performing Fast Snap tasks.
For information about THP tasks, see the HPE XP7 Provisioning for Open Systems User Guide .
Task Number of cache management devices
required
Initially create an FS pool. 8,192*
*FS assigns 4,096 of the 8,192 devices that are
available.
Create a volume. 1
Table Continued
68 Fast Snap cache management device requirements