JupyterLab stores the main build of JupyterLab with associated data, including extensions in Application Directory. The default Application Directory is the system JupyterLab directory where is not writable for OSC users.
This article discusses memory tuning strategies for VASP.
Typically the first approach for memory sensitive VASP issues is to tweak the data distribution (via NCORE or NPAR). The information at https://www.vasp.at/wiki/index.php/NPAR covers a variety of machines. OSC has fast communications via Infiniband.
This article focuses on debugging strategies for C/C++ codes, but many are applicable to other languages as well.
Rubber Duck Debugging
This approach is a great starting point. Say you have written some code, and it does not do what you expect it to do. You have stared at it for a few minutes, but you cannot seem to spot the problem.
Conda/Virtual environments must be installed on JupyterLab or Jupyter Notebook prior to use. Whereas older versions of Conda automatically installed a Jupyter kernel, users must now manually perform the installation process.
To perform the installation, users should load the preferred version of Python, activate the Conda/Virtual environment and run the following commands.
This page outlines ways to generate and view performance data for your program using tools available at OSC.
This section describes how to use performance tools from Intel. Make sure that you have an Intel module loaded to use these tools.
Intel VTune is a tool to generate profile data for your application. Generating profile data with Intel VTune typically involves three steps:
OSC HPC resources use an operating system called "Linux", which is a UNIX-based operating system, first released on 5 October 1991. Linux is by a wide margin the most popular operating system choice for supercomputing, with over 90% of the Top 500 list running some variant of it. In fact, many common devices run Linux variant operating systems, including game consoles, tablets, routers, and even Android-based smartphones.
This page outlines a way a professor can set up a file submission system at OSC for his/her classroom project.
Usage for Professor
After connecting to OSC system, professor runs
This document shows you how to use the NFSv4 ACL permissions system. 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 certian file or directory by user or group. NFSv4 ACLs provide more specific options than typical POSIX read/write/execute permissions used in most systems.
These commands are useful for managing ACLs in the dir locations of /users/<project-code>.
Understanding NFSv4 ACL
This is an example of an NFSv4 ACL
This HOWTO will demonstrate how to lower ones' disk space usage. The following procedures can be applied to all of OSC's file systems.
We recommend users regularly check their data usage and clean out old data that is no longer needed.
Users who need assistance lowering their data usage can contact OSC Help.