HP XP Racks - Manual (Page 18)

◦ About selecting a copy pace while splitting BC pairs, see “Splitting BC pairs” (page 48) .
◦ About selecting a copy pace while resynchronizing BC pairs, see “Resynchronizing or
restoring BC pairs” (page 55) .
Workflow for maximizing Quick Restore performance
Use the following workflow to maximize the performance of restoring pairs using Quick Restore:
1. Set the same RAID level and HDD device type.
For more information about HDD and HDD device types, see the HP XP7 Remote Web Console
User Guide.
2. Complete one of the following:
•
Place the P-VOL and S-VOLs into the same cache (location).
•
Complete the following:
a. Release specific data areas on the LDEV from Cache Residency cache.
b. Restore the pairs using Quick Restore.
For more information about restoring pairs using Quick Restore, see “Reverse
resynchronization” (page 53) .
c. Place the LDEVs into cache.
For more information about Cache Residency, including how to place LDEVs into cache
and release specific data areas on LDEVs from cache, see the HP XP7 Performance for
Open and Mainframe Systems User Guide.
3. Restore the pairs using Quick Restore.
For more information about restoring pairs using Quick Restore, see “Reverse resynchronization”
(page 53) .
4. Resume the original RAID levels.
For more information about resuming RAID levels, see “Workflow for setting the RAID level”
(page 58) .
Splitting pairs using consistency groups
A consistency group lets you perform tasks and change pair status on a group of BC pairs. With
consistency group (CG) pair-split, you can simultaneously split all of the pairs in a CG.
Using consistency group pair-split with shared volumes
If you share BC P-VOLs in a XP7 storage system with Cnt Ac-S or Cnt Ac-J S-VOLs, you can use
consistency group (CG) pair-split to keep BC S-VOLs consistent.
The following images illustrate CG pair-split with Cnt Ac-S.
18 Business Copy system requirements and planning