Beowulf Cluster Build

buildscc | 06 Jun 2012 | | projects

Overview

One of the physics research groups here at BU has donated the remnants of their old Beowulf cluster to us. This amounts to 23 nodes (specs to follow shortly) and some assorted cabling and power supplies. We also have plywood to mount them on, already cut to slot into a disused rack.

Power Distributor

The physics department was using boards custom-built by BU in order to split the power output from one power supply to three nodes. We currently have one of these boards, and will be contacting the department that made them in order to acquire more.

Layout

Each plywood shelf will be able to comfortably fit 3 nodes, a power supply, and a power distributor. We need to consider whether to mount the components directly to the board, or to purchase threaded spacers similar (or exactly like) motherboard posts found in a normal PC.

Software

We would like to run/manage all nodes from one of the servers currently in our rack. Most of the ways I’ve seen for doing this require a separate root partition on the server for every node to mount via NFS on boot. We need to research methods for having many nodes mount one shared NFS root directory on boot, or else this will be a pain to add/subtract nodes from.

Schedule

Hardware Build (Mounting components on plywood and throwing them into the rack) will tentatively happen the weekend of March 26-28. Contact Kyle if you’re interested.

Software Setup: ???


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4x4x4 LED Cube

Overview

Coming soon…

Electronics

Bill of Materials

PART ID VALUE DESCRIPTION DISTRIBUTOR DISTRIBUTOR NUMBER DATASHEET LINK
LED1-LED64 N/A BLUE LED 3MM N/A N/A N/A
R1;R2;R4;R7 2.2K 2.2K RESISTORS 1/4 WATT N/A N/A N/A
R5;R6;R8;R3 100 100 OHM RESISTORS 1/4 WATT N/A N/A N/A
IC1-IC4 74LS164 74LS164 DIP Serial In-Parallel Out Shift Register N/A N/A link
U1 Arduino Uno ARDUINO N/A N/A N/A
T1-T4 2N2222 2N2222 NPN SWITCHING TRANSISTOR N/A N/A link

Schematic

Schematic for the 4x4x4 LED Cube (made with EAGLE)

The actual EAGLE files can be found on the github in the hardware folder.

How does it work?

LED Cube Electronics

Reference

Github Repo

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Water Light Graffiti

Chris Woodall and Dan Gastler are building a water light graffiti wall, with LEDs and water sensors! They were both inspired by this French dude’s project and decided to make something similar/exactly like it. video and links to some other stuff

Trying To Do Science

Experiment 1: Water + Copper Tape

Experiment 2: Controlled Measured Sized Pads on a PCB

Experiment 3: Hell, lets put an LED on it