Getting the Most from Your Cores

CPU utilization metrics tell you how well your applications are using your processing resources.

How Persistent Memory Will Change Computing

Persistent memory is non-volatile data storage in DIMM format. Losing power means that you won't lose data. What is it, and how can you use it?

Parallel I/O

Understanding the I/O pattern of your application is the starting point for improving its I/O performance, especially if I/O is a fairly large part of your application’s run time.

Directive Coding

With directive coding, you annotate code with compiler directives to take advantage of parallelism or accelerators. The two primary standards are OpenACC and OpenMP.

New Release of Lmod Environment Modules System

Lmod is an indispensable tool for high-performance computing. With the new release of version 6, now is a good time to review Lmod and look at its new capabilities.

The Fundamentals of Building an HPC Cluster

High-performance computing begins with understanding what you are trying to achieve, the assumptions you make to get there, and the resulting boundaries and limitations imposed on you and your HPC system.

Encrypting Files

Encrypting your data is becoming increasingly important, but you don’t always have to use an encrypted filesystem. Sometimes just encrypting files is enough.

Virtuous Benchmarks: Using Benchmarks to Your Advantage

Benchmarks have been misused by both users and vendors for many years, but they don’t have to be the evil creature we all think them to be.

Monitoring with Nmon

HPC administrators sometimes assume that if all nodes are functioning, the system is fine. However, the most common issue users have is poor or unexpected application performance. In this case, you need a simple tool to help you understand what’s happening on the nodes.

Stat-like command-line tools for admins

ASCII tools can be life savers when they provide the only access you have to a misbehaving server. However, once you're on the node what do you do? In this article, we look at stat-like tools: vmstat, dstat, and mpstat.