Symmetrix DMX-3 architecture
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Symmetrix DMX-3 Hardware
Symmetrix DMX-3 architecture
The Symmetrix DMX-3 features a high-performance, Direct Matrix
Architecture (DMX) supporting up to 128 point-to-point serial
connections within the DMX system.
Symmetrix DMX technology is distributed across all channel
directors, disk directors, and global memory directors in Symmetrix
DMX systems. Enhanced global memory technology supports
multiple regions and 16 connections on each global memory director.
In the Direct Matrix Architecture, contention is minimized because
control information and commands are transferred across a separate
and dedicated message matrix. The major components of Symmetrix
DMX architecture are the front-end channel directors (and their
interface adapters), global memory directors, and back-end disk
directors (and their interface adapters).
The matrix midplane provides configuration flexibility through the
slot configuration. Each director slot port is hard-wired
point-to-point to one port on each global memory director board.
This section includes the following topics:
◆ “DMX-3 block diagram” on page 53
◆ “DMX-3 configuration rules and guidelines” on page 51
◆ “DMX-3 point-to-point message matrix” on page 55
◆ “DMX-3 slot configuration” on page 57
DMX-3 block
diagram
In a fully configured Symmetrix DMX-3, each of the eight director
ports on the sixteen directors connects to one of the 16 memory ports
on each of the eight global memory directors. These 128 individual
point-to-point connections facilitate up to 128 concurrent global
memory operations in the system. Figure 8 on page 54 illustrates the
point-to-point architecture and the interconnection of the major
components of the Symmetrix DMX-3 systems.
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