Welcome to the HPC web

This is a wiki home for high-performance computing at the NRAO. The area is still undergoing organizational changes but content in the Categories section is either actively maintained or will exist in coming months.


Older Areas

The following areas are not under active development but may still have useful information.

Recently changed topics across the HPC web

Listing the twelve most recent changes...

Web Topic Summary Date - UserSorted descending
HPC UsnoDifxOsPatch2 Neo Correlator Patching The patch process for the Neo correlator (installed at USNO on November 2019) is outlined below. A set of "checkboxes" is provided to assi... 2020-02-19 - 17:23 - JimJacobs
HPC UsnoDifxOsPatchChecklistItemState WARNING! THIS TOPIC IS GENERATED BY System.ChecklistPlugin PLUGIN. DO NOT EDIT THIS TOPIC (except table data)! Back to the checklist topic UsnoDifxOsPatch. *cont... 2020-02-18 - 17:36 - MarkWainright
HPC UsnoDifxEnvSensor2 Environment Monitor The environment monitor is positioned to read the temperature and humidity via a sensor mounted above the rack containing the correlator nodes... 2020-02-18 - 16:31 - JimJacobs
HPC UsnoDifxServerDiskLayout2 Disk Layout Server Disk Partitioning The disk layout is shown below as displayed using lsblk. The two disks are partitioned somewhat in parallel although the fir... 2020-02-18 - 16:28 - JimJacobs
HPC UsnoDifxServers2 Admin Servers Introduction Each correlator has two administrative servers, server 1 and server 2. The servers are used to administer the correlator and take no d... 2020-02-18 - 16:27 - JimJacobs
HPC UsnoDifxNetworkingDiagram2 Main.JimJacobs 2018 12 11 2020-02-18 - 14:23 - JimJacobs
HPC UsnoDifxNetworking2 Contents Networking As of this writing the plan is to fold the new correlator into the existing correlator network layout. This will facilitate keeping the two i... 2020-02-14 - 12:20 - JimJacobs
HPC UsnoDifxOsPatch2ChecklistItemState WARNING! THIS TOPIC IS GENERATED BY System.ChecklistPlugin PLUGIN. DO NOT EDIT THIS TOPIC (except table data)! Back to the checklist topic UsnoDifxOsPatch2. *con... 2020-02-13 - 13:31 - JimJacobs
HPC UsnoDifxLogging2 Logging Overview Server 1 runs rsyslogd via the systemd rsyslog.service; the main configuration for the rsyslod is /etc/rsyslog.conf. In addtion, server 1 provid... 2020-01-31 - 17:56 - JimJacobs
HPC UsnoDifxSMTP2 Mail Service Overview Since the correlator is effectively a compute device, very little email service is required. The only exception is that the system administ... 2020-01-23 - 18:16 - JimJacobs
HPC UsnoDifxNTP2 Time Service Overview Time services is provided primarily by server 1 using the chronyd daemon. The configuraiton file for chronyd is /etc/chrony.conf. Service... 2020-01-23 - 18:10 - JimJacobs
HPC UsnoDifxDHCP2 DHCP Overview Server 1 provides DHCP service on the network admin network. The setting for the daemon are in /etc/dhcp/dhcpd.conf. The IP addresses on all of ne... 2020-01-23 - 17:33 - JimJacobs

More extensive change lists are available via the WebChanges topic.

HPC Web Utilities

Topic revision: r23 - 2018-10-16, MikeHatz
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