Symmetrix DMX-3 architecture
55
Symmetrix DMX-3 Hardware
DMX-3
point-to-point
message matrix
Symmetrix DMX systems feature a point-to-point interconnect
technology for its separate matrix fabrics, which have been
implemented for both data plane functions and control plane
functions. This Symmetrix DMX message matrix provides high
bandwidth and low latency control plane communication, which
manages the data movement through the Symmetrix system.
Figure 9 on page 56 is a simplified view of the Symmetrix DMX
message matrix. The message fabric is made up of several fabric
elements, or FE, connected together so that all end nodes are
connected to a unique port on the outer edge of the message fabric.
The end nodes are commonly referred to as the Message Engine or ME.
The ME is an integral part of the CPU controller and allows the
front-end and back-end processors to communicate with each other
through the message fabric.
The message fabric is managed by a fabric manager, which provides
initialization for the fabric elements, real-time monitoring, and
diagnostic functions. The fabric manager is assigned to any one of the
director processors and communicates to the fabric through special
in-band fabric management packets.
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