HOWTO: Use Cron and OSCusage for Regular Emailed Reports

It is possible to utilize Cron and the OSCusage command to send regular usage reports via email


It is easy to create Cron jobs on the Owens and Pitzer clusters at OSC. Cron is a Linux utility which allows the user to schedule a command or script to run automatically at a specific date and time. A cron job is the task that is scheduled.

Shell scripts run as a cron job are usually used to update and modify files or databases; however, they can perform other tasks, for example a cron job can send an email notification.

System Downtime May 19, 2020

A downtime for all OSC HPC systems is scheduled from 7 a.m. to 5 p.m., Tuesday, May 19, 2020. The downtime will affect the Pitzer, Ruby and Owens Clusters, web portals and HPC file servers. Login services, except for, will not be available during this time. OSC clients are able to log into during the downtime but no changes will take place until the downtime is completed. In preparation for the downtime, the batch scheduler will begin holding jobs that cannot be completed before 7 a.m., May 19, 2020.

Free Academic Ansys Desktop License (2020 R1 version)

Ansys, Inc. is generously providing a temporary free trial license for home use as a COVID-19 response for OSC academic users. You can download the installer and license from our website, see link below. The license will expire on May 31, 2020. For more information, please visit our website (login required):


NetCDF (Network Common Data Form) is an interface for array-oriented data access and a library that provides an implementation of the interface. The netcdf library also defines a machine-independent format for representing scientific data. Together, the interface, library, and format support the creation, access, and sharing of scientific data.

For mpi-dependent codes, use the non-serial NetCDF module.


HDF5 is a general purpose library and file format for storing scientific data. HDF5 can store two primary objects: datasets and groups. A dataset is essentially a multidimensional array of data elements, and a group is a structure for organizing objects in an HDF5 file. Using these two basic objects, one can create and store almost any kind of scientific data structure, such as images, arrays of vectors, and structured and unstructured grids.

For mpi-dependent codes, use the non-serial HDF5 module.

maintenance outage on the Cluster Export Services

There will be maintenance on cluster export services on Tuesday, April 14 from 8:00am to 10:00am. The following services will be affected by this: Ruby: A reboot of login nodes. Jobs submitted from directories in /fs/project or /fs/scratch will not run during the outage, but jobs using only home directories and $TMPDIR will continue to run. Access to /fs/project and /fs/scratch from the Ruby login nodes will also be unavailable. OnDemand: The OnDemand services will be inaccessible.