Understanding I/O Patterns with strace, Part II

In the second article of this three-part series, we look at simple write examples in Fortran 90 and track the output with strace to see how it affects I/O patterns and performance.

S3QL Filesystem for HPC Storage

Many HPC sites with petabytes of data need some sort of backup solution. Among the many candidates, cloud storage is a serious contender. In this article, we look at one solution with some serious advantages: S3QL.

S.M.A.R.T., Smartmontools, and Drive Monitoring

Modern drives use S.M.A.R.T. (self-monitoring, analysis, and reporting technology) to gather information and run self-tests. Smartmontools is a Linux tool for interacting with the S.M.A.R.T. features of drives. But is S.M.A.R.T. the best way to predict impending drive doom?

Parallel Visions

Moore’s Law continues its unwavering march, with a twist.

Benchmarking Memory Bandwidth

One of the key bottlenecks for HPC application performance is memory bandwidth: literally, how fast you can get data from memory to the processor and back. A convenient microbenchmark named Stream measures the memory bandwidth of nodes and reveals a general trend over the last six years that might surprise you.

New OpenMP 4.0 Spec

Introduction of the new OpenMP specification abstracts away many of the thorny issues associated with today’s HPC hardware.

Parallel Tools

Even with tons of cores per node today, the traditional sets of tools are still serial-only, utilizing a single core; however, some of the more popular tools have parallel versions, allowing you to use the extra cores either to run the same command in parallel or to perform the same task across multiple nodes.

The RADOS Object Store and Ceph Filesystem – Part 4

We look into some everyday questions that administrators with Ceph clusters tend to ask: What do I do if a fire breaks out or I run out of space in the cluster?

Understanding I/O Patterns with strace, Part I

The language you choose to use affects I/O patterns and performance. We track a simple write I/O pattern with C and look at how to improve performance.

The YARN Invitation

Hadoop version 2 expands Hadoop beyond MapReduce and opens the door to MPI applications operating on large parallel data stores.