Difference between revisions of "Sysadmin"

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| Bowie || Example || hosts and exports user files; Jupyterhub; landing server
 
| Bowie || Example || hosts and exports user files; Jupyterhub; landing server
 
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| Hopper || Example || hopper: landing server, NFS host for cluster
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| Hopper || Example || landing server, NFS host for cluster
 
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| Sakurai || Example || Example
 
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Revision as of 09:09, 25 October 2021

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.

Compute (servers and clusters)

CS machines and clusters
Machine name SSH key Description
Lovelace Example Example
Bowie Example hosts and exports user files; Jupyterhub; landing server
Hopper Example landing server, NFS host for cluster
Sakurai Example Example
HopperPrime Example Runs Backup
Monitor Example Server Monitoring
Bronte Example Example
Layout 0 Example Example
Layout 3 Example Example
Layout 1 Example Example
Layout 2 Example Example
Smiley Example VM host, not accessible to regular users
Whedon Example Example
Pollock Example Example

There are 6 machines currently not in use in the 6 spaces above Monitor on the Equitorial Guinea rack

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

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