Difference between revisions of "Sysadmin"

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== '''Introducing our 3D printers:''' ==
+
This is the hub for the CS sysadmins on the wiki.
  
 +
= Overview =
  
{|style="margin: 0 auto;"
+
[https://docs.google.com/drawings/d/1XaULz5IxXV_BZQjrko3QJ8wV5aXsSTYcSWxxT49OyZk/edit If you're visually inclined, we have a colorful and easy-to-edit map of our servers here!]
|[[File:MakerBot.jpg|thumb|300px|MakerBot]]
+
 
|[[File:Robo_3D.jpg|thumb|300px|Robo 3D]]
+
== Server room ==
|[[File:Taz_LulzBot.jpg|thumb|300px|Taz Lulzbot]]
+
 
 +
Our servers are in Noyes, the science building that predates the CST. For general information about the server room and how to use it, check out [[Sysadmin:Server Room|this page]].
 +
 
 +
Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM
 +
 
 +
== Compute Resources ==
 +
 
 +
 
 +
{| class="wikitable"
 +
|+ CS machines and VMs
 +
|-
 +
! Machine name !! 159 Ip Address !! 10Gb Ip address !! Operating System !! Metal or Virtual !! Description !! RAM
 +
|-
 +
| Bowie || 159.28.22.5 || 10.10.10.15 || Debian 9 || Metal || hosts and exports user files; Jupyterhub; landing server || 198 GB
 +
|-
 +
| Smiley || 159.28.22.251 || 10.10.10.252 || Ubuntu 18.04 || Metal || VM host, not accessible to regular users || 156 GB
 +
|-
 +
| Web || 159.28.22.2 || 10.10.10.200 || Ubuntu 18.04 || Virtual || Website host || 8 GB
 +
|-
 +
| Auth || 159.28.22.39 || No 10Gb internet|| CentOS 7 || Virtual || host of LDAP user database || 4 GB
 +
|-
 +
| Code || 159.28.22.42 || 10.10.10.42 || Ubuntu 18.04 || Virtual || Gitlab host || 8 GB
 +
|-
 +
| Net || 159.28.22.1 || 10.10.10.100 || Ubuntu 18.04 || Virtual || network administration host for CS || 4 GB
 +
|-
 +
| Central || 159.28.22.177 || No 10Gb internet || Debian 9 || Virtual || ODK Central Host || 4 GB
 +
|-
 +
| Urey || 159.28.22.139 || No 10Gb internet || XCP-ng || Metal || Sysadmin Sandbox Environment || 16 GB
 
|}
 
|}
  
== '''Printing instructions:''' ==
+
{| class="wikitable"
 +
|+ Cluster machines
 +
|-
 +
! Machine name !! 159 Ip Address !! 10Gb Ip address !! Operating System !! Metal or Virtual !! Description !! RAM
 +
|-
 +
| Hopper || 159.28.23.1 || 10.10.10.1 || Debian 10 || Metal || landing server, NFS host for cluster || 64 GB
 +
|-
 +
| Lovelace || 159.28.23.35 || 10.10.10.35 || CentOS 7 || Metal || Large compute server || 96 GB
 +
|-
 +
| Pollock || 159.28.23.8 || 10.10.10.8 || CentOS 7 || Metal || Large compute server || 131 GB
 +
|-
 +
| Bronte || 159.28.23.140 || No 10Gb internet || CentOS 7 || Metal || Large compute server || 115 GB
 +
|-
 +
| Sakurai || 159.23.23.3 || 10.10.10.3 || Debian 10 || Metal || Runs Backup || 12 GB
 +
|-
 +
| Miyamoto || 159.28.23.45 || No 10Gb currently || Debian 10 || Metal || Runs Backup || 16 GB
 +
|-
 +
| HopperPrime || 159.28.23.142 || 10.10.10.142 || Debian 10 || Metal || Runs Backup || 16 GB
 +
|-
 +
| Monitor || 159.28.23.250 || No 10Gb internet || Debian 11 || Metal || Server Monitoring || 8 GB
 +
|-
 +
| Layout 0 || 159.28.23.2 || 10.10.10.2 || CentOS 7 || Metal || Head Node || 32 GB
 +
|-
 +
| Layout 1 || None || None || CentOS 7 || Metal || Compute Node || 32 GB
 +
|-
 +
| Layout 2 || None || None || CentOS 7 || Metal || Compute Node || 32 GB
 +
|-
 +
| Layout 3 || None || None || CentOS 7 || Metal || Compute Node || 32 GB
 +
|-
 +
| Layout 4 || None || None || CentOS 7 || Metal || Compute Node || 32 GB
 +
|-
 +
| Whedon 0 || 159.28.23.4 || No 10Gb internet|| CentOS 7 || Metal || Head Node || 256 GB
 +
|-
 +
| Whedon 1 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Whedon 2 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Whedon 3 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Whedon 4 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Whedon 5 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Whedon 6 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Whedon 7 || None || None || CentOS 7 || Metal || Compute Node || 256 GB
 +
|-
 +
| Hamilton 0 || 159.28.23.5 || No 10Gb internet || Debian 11 || Metal || Head Node || 128 GB
 +
|-
 +
| Hamilton 1 || None || None || Debian 11 || Metal || Compute Node || 256 GB
 +
|-
 +
| Hamilton 2 || None || None || Debian 11 || Metal || Compute Node || 256 GB
 +
|-
 +
| Hamilton 3 || None || None || Debian 11 || Metal || Compute Node || 256 GB
 +
|-
 +
| Hamilton 4 || None || None || Debian 11 || Metal || Compute Node || 256 GB
 +
|-
 +
| Hamilton 5 || None || None || Debian 11 || Metal || Compute Node || 256 GB
 +
|}
 +
 
 +
{| class="wikitable"
 +
|+ Lab machines
 +
|-
 +
! Machine name !! 159 Ip Address !! Location !! Operating System !! RAM
 +
|-
 +
| Borg || 159.28.22.10 || Turing (CST 222) || Ubuntu 20 || 16 GB
 +
|-
 +
| Gao || 159.28.22.11 || Turing (CST 222) || Ubuntu 20 || 8 GB
 +
|-
 +
| Snyder || 159.28.22.12 || Turing (CST 222) || Ubuntu 20 || 8 GB
 +
|-
 +
| Goldwasser || 159.28.22.13 || Lovelace (CST 219) || Ubuntu 20 || 8 GB
 +
|-
 +
| Bartik || 159.28.22.14 || Lovelace (CST 219) || Ubuntu 20 || 8 GB
 +
|-
 +
| Wilson || 159.28.22.15 || Lovelace (CST 219) || Ubuntu 20 || 8 GB
 +
|-
 +
| Bilas || 159.28.22.16 || Lovelace (CST 219) || Ubuntu 20 || 8 GB
 +
|-
 +
| Johnson || 159.28.22.17 || Lovelace (CST 219) || Ubuntu 20 || 8 GB
 +
|-
 +
| Graham || 159.28.22.14 || Lovelace (CST 219) || Ubuntu 20 || 8 GB
 +
|}
 +
 
 +
=== CS Machine Address List ===
 +
<pre>bowie.cs.earlham.edu smiley.cs.earlham.edu web.cs.earlham.edu auth.cs.earlham.edu code.cs.earlham.edu net.cs.earlham.edu central.cs.earlham.edu urey.cs.earlham.edu</pre>
 +
 
 +
=== Cluster Machine Address List ===
 +
<pre>
 +
hopper.cluster.earlham.edu lovelace.cluster.earlham.edu pollock.cluster.earlham.edu bronte.cluster.earlham.edu sakurai.cluster.earlham.edu miyamoto.cluster.earlham.edu hopperprime.cluster.earlham.edu monitor.cluster.earlham.edu whedon.cluster.earlham.edu layout.cluster.earlham.edu hamilton.cluster.earlham.edu</pre>
 +
 
 +
=== Lab Machine Address List ===
 +
<pre>borg.cs.earlham.edu gao.cs.earlham.edu snyder.cs.earlham.edu goldwasser.cs.earlham.edu bartik.cs.earlham.edu wilson.cs.earlham.edu bilas.cs.earlham.edu johnson.cs.earlham.edu graham.cs.earlham.edu</pre>
 +
 
 +
=== Specialized resources ===
 +
 
 +
Specialized computing applications are supported on the following machines:
 +
 
 +
* [[Sysadmin:GPGPU|GPU’s for AI/ML/data science]]: layout cluster
 +
* virtualization: smiley
 +
* containers: bowie
 +
 
 +
== Network ==
 +
 
 +
We have two network fabrics linking the machines together. There are three subdomains.
 +
 
 +
=== 10 Gb ===
 +
 
 +
We have 10Gb fabric to mount files over NFS. Machines with 10Gb support have an IP address in the class C range 10.10.10.0/24 and we want to add DNS to these addresses.
 +
 
 +
=== 1 Gb (cluster, cs) ===
 +
 
 +
We have two class C subnets on the 1Gb fabric: 159.28.22.0/24 (CS) and 159.28.23.0/24 (cluster). This means we have double the IP addresses on the 1Gb fabric that we have on the 10Gb fabric.
 +
 
 +
Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.
 +
 
 +
=== Intra-cluster fabrics ===
 +
 
 +
The layout cluster has an Infiniband infrastructure. Wachowski has only a 1Gb infrastructure.
 +
 
 +
== Power ==
  
=== '''Desiging your own 3D model:''' ===
+
We have a backup power supply, with batteries last upgraded in 2019 (?). We’ve had a few outages since then and power has held up well.
  
Software: OpenSCAD
+
== HVAC ==
  
Cheat Sheet: http://www.openscad.org/cheatsheet/index.html
+
HVAC systems are static and are largely managed by Facilities.
  
After creating your own 3D model follow this steps:
+
[[Topology|See full topology diagrams here.]]
* Render and compile your code by pressing F6
 
* Export the design as .stl
 
* If the file is in your own computer, move the file(name.stl) to the Mac found in Turing lab(CST 222)
 
  
=== '''Overhang / Supports''' ===
+
[[Sysadmin:Layers of abstraction for filesystems|A word about what's happening between files and the drives they live on.]]
  
Software: Meshmixer
 
  
Once you import a pre-existing model:
+
= New sysadmins =
* Use the align tool under the Edit tab to place model on bed
 
* Use the overhang tool under the Analysis tab to generate supports for the model
 
* Export as " *.stl " when finished
 
  
=== '''Instructions on how to use the 3D printers:''' ===
+
These pages will be helpful for you if you're just starting in the group:
  
==== '''Robo R1+ 3D Printer''' ====
+
* [[Sysadmin:New Sysadmins | Welcoming a new sysadmin ]]
 +
* [[Sysadmin:Troubleshooting|General troubleshooting tips for admins]]
 +
* [[Sandbox Notes|Sandbox Notes]]
 +
* [[Password managers]]
 +
* [[Server safety]]
 +
* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
  
Software for the printer: MatterControl
+
Note: you'll need to log in with wiki credentials to see most Sysadmin pages.
  
Printing from an SD card:
+
= Additional information =
*Insert a microSD card into the Mac and get rid of any files in it.
 
*Open MatterControl and drag your .stl file into the QUEUE section of the application.
 
*On the top-left section, click on “Select Printer.” Select “Robo 3D TM Turing” in the window that pops out.
 
*Towards the bottom of the QUEUE section, you will find a “Queue” button. Click on it to get a list.
 
*On the list, below GCode, select “Export to Folder or SD Card.” Click on the microSD card under “Devices” in the side panel and click on “Export”
 
*Now, in Finder, browse to the microSD card and rename the file you just exported as “auto0.g” (auto zero dot g). Choose “Use.g” if a prompt appears.
 
*Then, safely remove the microSD card from the Mac and insert it into the Robo 3D printer.
 
*Prep the build plate using one the following:
 
**Glue Stick
 
**Vinyl Sheeting
 
**Hairspray
 
:Apply whichever product on the surface of the build plate enough to cover the surface you will be printing on.                                                             
 
*Turn the printer on. Your print will start after about 5 minutes.
 
*After the print is over, wait for the temperature to cool down and carefully remove the 3D printed object from the build plate.
 
*Clean the build plate.
 
  
Printing from the computer:
+
These pages contain a lot of the most important information about our systems and how we operate.
*Open MatterControl and drag your .stl file into the QUEUE section of the application.
 
*On the top-left section, click on “Select Printer.” Select “Robo 3D TM Turing” in the window that pops out.
 
*Under "Settings" ensure that the correct material is selected.
 
*Under "Controls" an offset of 0.9 typically shows the best results.
 
*Pre-heat the extruder and bed on the same page.
 
*Alternatively, near the top center of the screen, an extruder temperature and a bed temperature will be shown, mouse over and click "pre-heat" for both.
 
*Prep the build plate using one the following:
 
**Glue Stick
 
**Vinyl Sheeting
 
**Hairspray
 
*Click print once the printer has heated up.
 
*After the print is over, wait for the temperature to cool down and carefully remove the 3D printed object from the build plate.
 
*Clean the build plate.
 
  
==== '''Taz Lulzbot 3D Printer''' ====
+
===Technical docs===
Software for the printer: Cura
 
  
Steps to follow in order to print:
+
* [https://code.cs.earlham.edu/sysadmin/ticket-tracker Ticket tracking for current projects]
*Insert a microSD card into the Mac.
+
* [[Server safety]]
*Open Cura and press “Load Model” to upload the stl file you want to print.
+
* [[Sysadmin:Backup|Backup]]
*Right click “Control” and select the “Save gcode” and then choose the SDcard under the “Devices” panel.
+
* [[Sysadmin:Monitoring | Monitoring ]]
*Make sure the Taz 3D Printer is turned on.
+
* [[Sysadmin:SSH|SSH info relevant to admins]]
*Safely eject the sdCard from the Mac and insert it into Taz Printer (on left side of the LCD screen)
+
* [[Sysadmin:User Management | User Management]] and [[Sysadmin:LDAP|LDAP]] generally
**Make sure the SD card has the pins facing towards you when insert it
+
* [[Sysadmin:Jupyterhub Notebook Server|Jupyterhub]] and [[Nbgrader notes|NBGrader]]
*Back on the LCD screen, rotate the knob counter-clockwise to decrease the print speed to ~50%
+
* [[Sysadmin:MailStack|Email service]]
*Press the knob, scroll down by rotating the knob clockwise and select “Temperature”.
+
* [[Sysadmin:XenDocs | Xen Server]]
*Select “Custom Temp” and set the "Nozzle" to 240 and "Bed" to 64
+
* [[Sysadmin:NFS|Network File System (NFS)]]
*After a few seconds, the LCD will display the info screen again and the printer will start heating up. Wait until the temperatures reach 240C and 64C.
+
* [[Sysadmin:Web Servers|Web Servers and Websites]]
*In the info screen, press the knob again. Scroll down and select “Print from SD” Select your file and it will start printing right away.
+
* [[Sysadmin:Services:Databases|Databases]]
*Once the printing has finished, wait for the bed to cool down and carefully remove the 3D printed object.
+
* [[Sysadmin:DNS & DHCP|DNS and DHCP]]
 +
* [[Sysadmin:AWS|AWS]]
 +
* [[Bash_start_up_script|Bash startup scripts]]
 +
* [[Sysadmin:VirtualBox | VirtualBox]]
 +
* [[X Applications]]
 +
* [[Sysadmin:Services:ClusterOverview|Cluster Overview]] and [[Sysadmin:Ccg-admin|additional details]]
 +
* [[Sysadmin:Firewall|Firewall]] running on babbage.cs.e.e
 +
* [[Sysadmin:Setting_up_Lovelace_Lab_Machines|Setting up Lab Machines]]
  
==== '''MakerBot 3D Printer''' ====
+
===Common tasks===
Software for the printer: ReplicatorG
+
* [[Sysadmin:Recurring Tasks | Recurring tasks - e.g. software updates, hardware replacements]]
 +
* [[Sysadmin:Contacting all users|Contacting all users]]
 +
* [[Reset password]]
 +
* [[Sysadmin:Software installation | Software installation]]
 +
* [[Modules | Installing software under modules ]]
 +
* [[Sysadmin:AddComputer|Add a computer to CS or cluster domains]]
 +
* [[Senior projects|Supporting senior projects]]
 +
* [[ShutdownProcedure|How to do a planned shutdown and reboot of the system]]
 +
** [[Sysadmin:TestingServices | Testing services]] (after a reboot, upgrade, change in the phase of the moon, etc.)
 +
* [[Sysadmin:Upgrading SSL Certificate | Upgrading SSL Certificates ]]
 +
* [[Sysadmin:Launch at startup|Launch a process at startup]]
 +
* [[Sysadmin:Psql-setup | setup psql for cs430 students]]
  
Steps to follow in order to print:
+
===Group and institution information===
*Insert a microSD card into the Mac.
+
* [[Sysadmin:CS-ITS Interoperability|Working with ITS]]
*Open ReplicatorG, drag and drop your stl file into application screen.
+
* [[Sysadmin:Recurring spending | Recurring spending ]]
*Adjust your model if you need to.
+
* [[Sysadmin:SlackAndGitLab | Slack and GitLab integration]]
*Select “Generate GCode” on the bottom right.
 
*Make sure the values are set as shown in the image below and then select “Generate GCode”
 
:[[File:Replicator_values.png|thumb|250px|center]]
 
*If prompted with an “Acceleration Warning” select “OK”
 
*Wait until it generates the gcode.
 
*After the file is generated go to the gcode tab and modify the numbers on the lines M104 should be 230 and M109 should be 128, i.e.:
 
:M104 S230 T1 (set extruder temperature) M109 S128 T1 (set HBP  temperature)
 
:Make sure to save it by pressing “Command + S”.
 
*Select “Build to file using SD Card” as shown in the image below. Select the microSD card and make sure to save it as “.x3g” format.
 
:[[File:Build_from_sd.png|thumb|300px|center]]
 
*Wait until it is done building and then safely eject the sdCard from the Mac and insert it into the MakerBot. Note: You can find the sdCard slot as shown in the image below:
 
:[[File:MakerBot-slot.jpg|thumb|300px|center]]
 
*Turn on the printer.
 
*Select “Build from SD” and then using the arrows scroll down to your file.
 
*The printer will start heating up and once it finishes heating up, it will start printing.
 
*Once the printing has finished, wait for the bed to cool down and carefully remove the 3D printed object.
 

Latest revision as of 11:15, 1 June 2022

This is the hub for the CS sysadmins on the wiki.

Overview

If you're visually inclined, we have a colorful and easy-to-edit map of our servers here!

Server room

Our servers are in Noyes, the science building that predates the CST. For general information about the server room and how to use it, check out this page.

Columns: machine name, IPs, type (virtual, metal), purpose, dies, cores, RAM

Compute Resources

CS machines and VMs
Machine name 159 Ip Address 10Gb Ip address Operating System Metal or Virtual Description RAM
Bowie 159.28.22.5 10.10.10.15 Debian 9 Metal hosts and exports user files; Jupyterhub; landing server 198 GB
Smiley 159.28.22.251 10.10.10.252 Ubuntu 18.04 Metal VM host, not accessible to regular users 156 GB
Web 159.28.22.2 10.10.10.200 Ubuntu 18.04 Virtual Website host 8 GB
Auth 159.28.22.39 No 10Gb internet CentOS 7 Virtual host of LDAP user database 4 GB
Code 159.28.22.42 10.10.10.42 Ubuntu 18.04 Virtual Gitlab host 8 GB
Net 159.28.22.1 10.10.10.100 Ubuntu 18.04 Virtual network administration host for CS 4 GB
Central 159.28.22.177 No 10Gb internet Debian 9 Virtual ODK Central Host 4 GB
Urey 159.28.22.139 No 10Gb internet XCP-ng Metal Sysadmin Sandbox Environment 16 GB
Cluster machines
Machine name 159 Ip Address 10Gb Ip address Operating System Metal or Virtual Description RAM
Hopper 159.28.23.1 10.10.10.1 Debian 10 Metal landing server, NFS host for cluster 64 GB
Lovelace 159.28.23.35 10.10.10.35 CentOS 7 Metal Large compute server 96 GB
Pollock 159.28.23.8 10.10.10.8 CentOS 7 Metal Large compute server 131 GB
Bronte 159.28.23.140 No 10Gb internet CentOS 7 Metal Large compute server 115 GB
Sakurai 159.23.23.3 10.10.10.3 Debian 10 Metal Runs Backup 12 GB
Miyamoto 159.28.23.45 No 10Gb currently Debian 10 Metal Runs Backup 16 GB
HopperPrime 159.28.23.142 10.10.10.142 Debian 10 Metal Runs Backup 16 GB
Monitor 159.28.23.250 No 10Gb internet Debian 11 Metal Server Monitoring 8 GB
Layout 0 159.28.23.2 10.10.10.2 CentOS 7 Metal Head Node 32 GB
Layout 1 None None CentOS 7 Metal Compute Node 32 GB
Layout 2 None None CentOS 7 Metal Compute Node 32 GB
Layout 3 None None CentOS 7 Metal Compute Node 32 GB
Layout 4 None None CentOS 7 Metal Compute Node 32 GB
Whedon 0 159.28.23.4 No 10Gb internet CentOS 7 Metal Head Node 256 GB
Whedon 1 None None CentOS 7 Metal Compute Node 256 GB
Whedon 2 None None CentOS 7 Metal Compute Node 256 GB
Whedon 3 None None CentOS 7 Metal Compute Node 256 GB
Whedon 4 None None CentOS 7 Metal Compute Node 256 GB
Whedon 5 None None CentOS 7 Metal Compute Node 256 GB
Whedon 6 None None CentOS 7 Metal Compute Node 256 GB
Whedon 7 None None CentOS 7 Metal Compute Node 256 GB
Hamilton 0 159.28.23.5 No 10Gb internet Debian 11 Metal Head Node 128 GB
Hamilton 1 None None Debian 11 Metal Compute Node 256 GB
Hamilton 2 None None Debian 11 Metal Compute Node 256 GB
Hamilton 3 None None Debian 11 Metal Compute Node 256 GB
Hamilton 4 None None Debian 11 Metal Compute Node 256 GB
Hamilton 5 None None Debian 11 Metal Compute Node 256 GB
Lab machines
Machine name 159 Ip Address Location Operating System RAM
Borg 159.28.22.10 Turing (CST 222) Ubuntu 20 16 GB
Gao 159.28.22.11 Turing (CST 222) Ubuntu 20 8 GB
Snyder 159.28.22.12 Turing (CST 222) Ubuntu 20 8 GB
Goldwasser 159.28.22.13 Lovelace (CST 219) Ubuntu 20 8 GB
Bartik 159.28.22.14 Lovelace (CST 219) Ubuntu 20 8 GB
Wilson 159.28.22.15 Lovelace (CST 219) Ubuntu 20 8 GB
Bilas 159.28.22.16 Lovelace (CST 219) Ubuntu 20 8 GB
Johnson 159.28.22.17 Lovelace (CST 219) Ubuntu 20 8 GB
Graham 159.28.22.14 Lovelace (CST 219) Ubuntu 20 8 GB

CS Machine Address List

bowie.cs.earlham.edu smiley.cs.earlham.edu web.cs.earlham.edu auth.cs.earlham.edu code.cs.earlham.edu net.cs.earlham.edu central.cs.earlham.edu urey.cs.earlham.edu

Cluster Machine Address List

hopper.cluster.earlham.edu lovelace.cluster.earlham.edu pollock.cluster.earlham.edu bronte.cluster.earlham.edu sakurai.cluster.earlham.edu miyamoto.cluster.earlham.edu hopperprime.cluster.earlham.edu monitor.cluster.earlham.edu whedon.cluster.earlham.edu layout.cluster.earlham.edu hamilton.cluster.earlham.edu

Lab Machine Address List

borg.cs.earlham.edu gao.cs.earlham.edu snyder.cs.earlham.edu goldwasser.cs.earlham.edu bartik.cs.earlham.edu wilson.cs.earlham.edu bilas.cs.earlham.edu johnson.cs.earlham.edu graham.cs.earlham.edu

Specialized resources

Specialized computing applications are supported on the following machines:

Network

We have two network fabrics linking the machines together. There are three subdomains.

10 Gb

We have 10Gb fabric to mount files over NFS. Machines with 10Gb support have an IP address in the class C range 10.10.10.0/24 and we want to add DNS to these addresses.

1 Gb (cluster, cs)

We have two class C subnets on the 1Gb fabric: 159.28.22.0/24 (CS) and 159.28.23.0/24 (cluster). This means we have double the IP addresses on the 1Gb fabric that we have on the 10Gb fabric.

Any user accessing *.cluster.earlham.edu and *.cs.earlham.edu is making calls on a 1Gb network.

Intra-cluster fabrics

The layout cluster has an Infiniband infrastructure. Wachowski has only a 1Gb infrastructure.

Power

We have a backup power supply, with batteries last upgraded in 2019 (?). We’ve had a few outages since then and power has held up well.

HVAC

HVAC systems are static and are largely managed by Facilities.

See full topology diagrams here.

A word about what's happening between files and the drives they live on.


New sysadmins

These pages will be helpful for you if you're just starting in the group:

Note: you'll need to log in with wiki credentials to see most Sysadmin pages.

Additional information

These pages contain a lot of the most important information about our systems and how we operate.

Technical docs

Common tasks

Group and institution information