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29%
HPC Monitoring: What Should You Monitor?
15.01.2014
Home »  HPC  »  Articles  » 
days, then you might be able to capture data about whether a node is alive or dead infrequently, perhaps every 5-15 minutes, or even longer if you like. Checking it once every 3 seconds seems a bit like
29%
Live Kernel Update Tools
21.08.2014
Home »  Archive  »  2014  »  Issue 22: OpenS...  » 
Lead Image © Andrea, Fotolia.com
to be equivalent in terms of functionality: Kpatch [2] and kGraft [3]. Technically, the two approaches have major differences with widely divergent functionality. Perhaps this divergence is why Red Hat and SUSE
29%
Udev with virtual machines
14.11.2013
Home »  Archive  »  2013  »  Issue 17: Cloud...  » 
Lead Image © orangeline, 123RF.com
kernel ordinal number (%n). Listing 3 70-persistent-net.rules Rules for KVM: SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:*", KERNEL=="eth*", NAME="eth%n" Rules
29%
I/O Profiling at the Block Level
27.08.2014
Home »  HPC  »  Articles  » 
files in ext3/ext4 filesystems Zipf theta - Estimate of Zipfian distribution theta Ioprof is written in Perl and is fairly easy to run, but it has to be run as root (or with root privileges
29%
Using loop directives to improve performance
05.02.2019
Home »  Archive  »  2019  »  Issue 49: Anato...  » 
Lead Image © orson, 123RF.com
but independently of one another (Figure 2). Table 3 Gang Execution Fortran C !$acc parallel do i=1,n ! do something enddo!$acc end parallel pragma acc parallel{ for (int i=0; i
29%
Using a Bash script to mirror external monitors
10.06.2015
Home »  Archive  »  2015  »  Issue 27: Fault...  » 
Lead Image © bowie15, 123RF.com
(xrandr) "provides automatic discovery of modes (resolutions, refresh rates, …) [and] the ability to configure output dynamically (resize, rotate, move, …)" [3]. The xrandr configuration tool lets me
29%
Isolate workloads from Docker and Kubernetes with Kata Containers
05.02.2019
Home »  Archive  »  2019  »  Issue 49: Anato...  » 
Photo by Stephen Pedersen on Unsplash
, to warm up both the image cache and the Linux cache. Listing 3 Benchmark #!/bin/bash N=100 time for i in {1..$N}; do CID=$(docker run --name server-$i -d nginx) docker exec server-$i /bin
29%
More Small Tools for HPC Admins
16.11.2017
Home »  HPC  »  Articles  » 
scrolling terminal output. For a quick example, the simple command $ watch -n 1 uptime tells watch to run a command (uptime ) every second (-n 1 ). It will continue to run this command forever unless you
29%
Manage status messages in CouchDB with MapReduce
27.09.2024
Home »  Archive  »  2024  »  Issue 83: Storage  » 
Photo by Austin Distel on Unsplash
query large amounts of data on distributed systems. CouchDB has been an Apache project since 2008. Version 1.0 in 2010 has evolved into version 3.3 today. "Couch" was originally an acronym for "cluster
29%
OpenACC – Parallelizing Loops
09.01.2019
Home »  HPC  »  Articles  » 
3: Gang Execution Fortran C !$acc parallel    do i=1,n       ! do something    enddo !$acc end parallel     #pragma acc parallel {    for (int i=0; i < n

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