Running multiple commands (or even computers) in parallel for more efficiency.

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Is it normal to overworking of just one CPU when using openMP

When I use OpenMP in FORTRAN to parallelize a program on linux, ' top' command show me just one processor working ~%800 instead of ~%100 x 8 processors. Is it a expected situation ?
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Is Virtual Machine capable of running as normal PC would?

Let's imagine that you have a super-powerful-server at home of size of desktop (just visualisation). 2048 physical cores each 3GHz, 64TB RAM, GTX 780 Ti Black Edition (SLIx4, (four graphics card ...
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losetup Find in Parallel / Concurrency

I'm writing a makefile that at some point builds image files. I'm using losetup -f in the file to find a free loop device when building out each image. Since the images are independent of each ...
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281 views

Kerrighed cluster does not use all nodes when running OpenMP

I've been given access to a recently built cluster that uses Kerrighed. I'm the first user of this cluster, so setup and configuration problems may be a possibility. I'm also totally new to ...
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Jenkins realtime console output for parallel threaded fabric command

We have a Python fabric command that runs in parallel across several hosts, something like this: $ fab --hosts=prod1.server,prod2.server,prod3.server --parallel copy_cache This will copy cache to ...
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Linux command-line utils with built-in support of multithreading

I would like to be able to compare performance of multicore computers from a point of view of a user who performs typical day-to-day tasks in Linux. My current goal is to collect a list of compute ...
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Can I set up PVM in such way that master doesn't start own tasks?

We have a Perceus cluster (Warewulf) consisting of 4-core master and a number of 4-core nodes. I can start PVM on the master and then add all nodes - it works fine. However, there are other guys who ...
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How to implement Intel MPI benchmarks for mpich2?

Many people have recommended the use of Intel MPI benchmarks for mpich2, however the installation is not very simple. Could anyone provide steps for the installation and sample test case for it? Which ...
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Scientific Linux 5.5 hangs at the beginning

We are taking theses days a parallel processing course in college, we are working on scientific linux 5.5 version with MPI, I just imported .ova on the virtual box but unfortunately when am trying to ...
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Is it possible to configure Linux OpenMPI v1.6.5 to use multiple working directories on a single node?

I am running some quantum chemical calculations on a refurbished PowerEdge rack server, with dual quad-core Xeons, 16GB RAM, and a single 500GB SATA HDD. OS is vanilla Debian Wheezy. For one of the ...
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Do threads/processes that create/delete files/directories under a shared parent dir interfere?

I was wondering: If I have a directory /a/b/c/ and under c X threads create subdirectories and files and delete them (they are temporary directories and files as intermediate steps of processing) do ...
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How to parallelize crontab executions to increase user base for web app based on mongodb and mysql?

I have a symfony based web application that runs on mongodb and mysql backend. The principle of the application is that for each user there is a python script that runs 4-12 times a day on cronjobs ...
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How to accelerate a shell script for a mongoDB application?

I started shell scripting for my work, but I must admit I'm still far away from even being a rookie. Therefore I wanted to ask you for your help/advice. I build a script for a big data application ...
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How to extract multi volume cpio archive in parallel

I have a large set of files. How can I create multivolume archive using cpio in such a way that I can extract them in parallel? Currently I'm using: find mydir | cpio -ov | split -d -C 3840M - ...
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Is parallelism in computer science always directly tied to the number of processor cores?

Specific to the Java programming language, would it be accurate to say that two threads can be concurrent, but can only truly be run in parallel if there are two or more cores?
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How does niceness relate to CPU allocation on Solaris?

The wikipedia article for nice describes the relationship as follows: As a simple example, when two otherwise identical CPU-bound processes are running simultaneously on a single-CPU Linux system, ...
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How to setup grid/clutster computers?

We have 3 labs and each lab have 30 computers having different OS's on them windows, Ubuntu mostly, so i was thinking if i can connect them using grid computing, so we can use them for our research ...
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need advice on hardware for doing parallel processing

We are intending to buy a powerful workstation for our daily processing of some seismic data. The process consists of doing numeric processing on data acquired on different seismic stations and by its ...