HP Hitachi Dynamic Link Manager Software - Manual (Page 45)

2. HDLM Functions
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Figure 2-8: Flow of I/O Data When the Load Balancing Function Is Used
When the load balancing function is used, I/O operations are distributed via multiple
paths (A, B, C, and D). This helps to prevent problems with system performance and
helps prevent bottlenecks from occurring.
2.7.1 Paths To Which Load Balancing Is Applied
This subsection describes, for each type of storage system, the paths to which the load
balancing function is applied.
(1) When Using the Thunder 9500V Series, or Hitachi AMS/WMS series
HDLM performs load balancing between owner paths or between non-owner paths.
An owner path is a path that passes through the CHA. This path is set on the owner
controller of the storage system LU. Since the owner controller varies depending on
the LU, the owner path also varies depending on the LU. A non-owner path is a path