HP XP7 Storage - Manual (Page 19)

Reader function, you can configure the LDEV ownership and Compatible PAV in several different
ways.
•
Configuring one MP blade to own all LDEVs in a CU.
Using this configuration, you can create a record set for the data writing and process the
Read Record Set with the same MP blade. This balances the worload in the HP XP7 Storage
system across the MP blades. Note, however, that if the workload is not balanced among
CUs, the utilization of each MP blade may not be balanced, and careful monitoring must be
done to keep the utilization of each MP blade within recommended limits.
•
Assigning LDEVs in a CU to multiple MP blades.
LDEVs in a CU are assigned to multiple MP blades, and aliases assigned by Compatible PAV
to the utility volume remain on one MP blade. In this configuration, the record sets are created
in multiple blades, but the Read Record Set operation is performed in one blade. This
configuration provides an alternative for using DKCs when you cannot configure all device
ownership under one MP blade. This configuration can also reduce workload among MP
blades, because the data writing operations in a CU are performed in multiple MP blades.
Configuration for the XRC Multiple Reader function 19