Owens
HOWTO: Use Address Sanitizer
Address Sanitizer is a tool developed by Google detect memory access error such as use-after-free and memory leaks. It is built into GCC versions >= 4.8 and can be used on both C and C++ codes. Address Sanitizer uses runtime instrumentation to track memory allocations, which mean you must build your code with Address Sanitizer to take advantage of it's features.
There is extensive documentation on the AddressSanitizer Github Wiki.
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
Cron
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 my.osc.edu, will not be available during this time. OSC clients are able to log into my.osc.edu 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.
Software Refresh - May 2020
OSC will be refreshing the software stack for Owens and Pitzer on May 19, 2020. This will be done in a system-wide downtime. During the software refresh, some default versions will be changed to be more up-to-date. Information about the new default versions, as well as all available versions of each software package will be included on the corresponding OSC software webpage. See https://www.osc.edu/supercomputing/software-list.
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): https://www.osc.edu/resources/getting_started/howto/howto_install_free_academic_ansys_desktop_license_for_covid19
HOWTO: Manage Access Control List (ACLs)
An ACL (access control list) is a list of permissions associated with a file or directory. These permissions allow you to restrict access to a certain file or directory by user or group.
OSC supports NFSv4 ACL on our home directory and POSIX ACL on our project and scratch file systems. Please see the how to use NFSv4 ACL for home directory ACL management and how to use POSIX ACL for managing ACLs in project and scratch file systems.
NetCDF-Serial
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.
