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7 PS Series Architecture: MPIO with Devices That Have Unequal Link Speeds | TR1105 v1
The service periodically retrieves the current volume layout from the PS Series Group. It also
monitors the iSCSI sessions and SAN topology and reconfigure the iSCSI session mesh when
necessary (see Figure 1).
Together, these components allow administrators to easily install and configure MPIO for iSCSI networks.
The MPIO extensions, along with a redundant iSCSI hardware configuration, create the infrastructure
needed for a completely fault tolerant and efficient MPIO solution.
I/O
I/O
I/O
TABLE
DATA
DATA
DATA
DATA
DATA
DATA
VOLUME
Figure 1 Dell PS Series MPIO extensions automatically manage iSCSI sessions and route I/O directly to
the Member servicing it
Multiple I/O streams are concurrently routed through the host iSCSI sessions directly to the PS Series
Member servicing them. Using the Dell PS Series MPIO extensions, the best path for each I/O is selected
by using knowledge about the volume layout in the PS Series Group. The Dell PS Series MPIO extensions
automatically manage these iSCSI sessions.