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Alan Sill

Mini-cluster with DIN rail mount, nearly complete. Palmshell (Radxa X4L) head node connected to four X4 worker nodes by 2.5 GbE, Jetson Orin Nano gets connected at its maximum 1 GbE by a USB to Ethernet adapter, 1 GbE to the outside world. Each of the X4s has an Intel N100 CPU with 4 cores, as does the head node. It's very compact: 9" wide x about 6.5" high by 5" deep (7" if you count the space for the Ethernet cables). There are 3 power supplies also for the head node, GPU node, and PoE switch.

Front view of the mini-cluster described in the post showing GPU node to the left, flat wide power over Ethernet switch at the bottom with only the power supply connector in view, four Radxa X4 worker nodes at the middle level, and a Palmshell SlimX4L (Radxa X4L) head node at the top of the stack.
View from the front left corner of the mini-cluster described in the post showing GPU node to the left, flat wide power over Ethernet switch at the bottom with only the power supply connector in view, four Radxa X4 worker nodes at the middle level, and a Palmshell SlimX4L (Radxa X4L) head node at the top of the stack.
View from the back right corner of the mini-cluster described in the post showing GPU node to the right, flat wide power over Ethernet switch at the bottom with all Ethernet connections in view, four Radxa X4 worker nodes at the middle level and a Palmshell SlimX4L (Radxa X4L) head node at the top of the stack, all connected to the switch, and two USB to Ethernet converters, one connected to the GPU node and one left free for a connection to the outside world.
Back view of the mini-cluster described in the post showing GPU node to the right, flat wide power over Ethernet switch at the bottom with all Ethernet connections in view, four Radxa X4 worker nodes at the middle level and a Palmshell SlimX4L (Radxa X4L) head node at the top of the stack, all connected to the switch, and two USB to Ethernet converters, one connected to the GPU node and one left free for a connection to the outside world.
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Alan Sill

I may shorten the posts to lower the head node down about half an inch, as there is more clearance than is needed between the X4 nodes and the DIN rail holding up the head node. All of the nodes are connected to the rails with easily removable spring-loaded standard DIN rail clips, which should make servicing the nodes easy when the time comes. I will also probably add another screw to the aluminum backer piece used to allow attaching these clips to the worker nodes to keep them firmly in place.

Alan Sill

Also it's weird that I've been giving the dimensions in inches, although I'm just as comfortable with metric units, and for various reasons all of the screws and nuts used to hold this together are metric.

Feb 03, 2025, 08:09 AM·Public·Web
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Alan Sill

(And yes, I could have used power over Ethernet also for the GPU node if I had bought a switch with more PoE ports!)

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