Browse Prior Art Database

Automatic Rack Configuration Management of Scalable Hardware

IP.com Disclosure Number: IPCOM000107224D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 1 page(s) / 59K

Publishing Venue

IBM

Related People

Childs, PL: AUTHOR [+4]

Abstract

Disclosed is an "interconnecting cage" for exploiting additional bandwidth in a partially populated rack. The cages contain nodes of a parallel machine which are interconnected using a crossbar switch.

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This is the abbreviated version, containing approximately 78% of the total text.

Automatic Rack Configuration Management of Scalable Hardware

      Disclosed is an "interconnecting cage" for exploiting
additional bandwidth in a partially populated rack.  The cages
contain nodes of a parallel machine which are interconnected using a
crossbar switch.

      The 'interconnecting cage' is composed mostly of inexpensive
material (such as plastics) and provides the necessary jumpers to
interconnect otherwise unused connections.   As additional cages are
purchased, these interconnecting cages could be replaced by hardware.
Fig. 1(a) shows the fully populated switch system mentioned above,
with the potential 'jumpers' shown by dashed lines. Fig. 1(b) shows
how the half populated configuration would utilize the jumpers in
blocks (66), (68), (74), and (76) to provide additional bandwidth to
this network.  If we follow the path from the third output of (62),
we see that it is connected to the first input of (74), third input
of (74), third output of (66), first output of (66), and finally to
the third input of (70).  This provides two paths from (62) to (72),
two connections from (64) to (70), and two connections from (64) to
(72).

      Figure 1 shows an example of the jumper interconnections for a
2-stage crossbar network based on a 4X4 switch.  This technique can
also be extended to a 2-stage crossbar network based on an NXN
crossbar switch, where N is an even power of 2.

      There are several advantages to this approach:
1)   The 'i...