HP XP P9500 Storage - Manual (Page 32)

Platform V/VM series, and Virtual Storage Platform series. In a non-cluster
environment, the load balancing function is available for the Thunder 9500V
series, Lightning 9900 series, Lightning 9900V series, Hitachi AMS2000/AMS/
WMS/SMS series, Hitachi USP series, Universal Storage Platform V/VM series,
Virtual Storage Platform series, and EMC DMX series. For details on the
various cluster software that HDLM supports, see Cluster Support on page
2-46 .
Figure 2-7 Flow of I/O Data When the Load Balancing Function Is Not Used on
page 2-12 shows the flow of I/O data when the load balancing function is
not used. Figure 2-8 Flow of I/O Data When the Load Balancing Function Is
Used on page 2-13 shows the flow of I/O data when the load balancing
function is used. Both figures show examples of I/O operations being issued
for the same LU by multiple applications.
Figure 2-7 Flow of I/O Data When the Load Balancing Function Is Not
Used
When the load balancing function is not used, I/O operations converge onto a
single path (A). The load on that one path (A) will cause a bottleneck, which
might cause problems with system performance.
2-12
HDLM Functions
Hitachi Dynamic Link Manager User Guide for Windows ®