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15%
Monitor your nodes with collectl
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© nobeastsofierce, 123RF.com
Commands = -f /var/log/collectl -r00:00,7 -m -F60 -s+YZCD --iosize These options allow me to monitor CPU, disk, and network in brief mode and slab, processes, and disk in detailed mode. I also added the ability
15%
Warewulf Cluster Manager – Completing the Environment
20.06.2012
Home »  HPC  »  Articles  » 
in a .ssh subdirectory in the root of your account. [laytonjb@test1 ~]$ cd .ssh [laytonjb@test1 .ssh]$ ls -s total 12 4 id_rsa 4 id_rsa.pub 4 known_hosts I want to copy the public key contained in the
15%
A closer look at hard drives
18.07.2013
Home »  Archive  »  2013  »  Issue 15: What’...  » 
Lucy Baldwin, 123RF
of file deletions – resolving this problem in most configurations not involving RAID, which is still negatively affected. The /etc/fstab file shows that this partition is installed with Ubuntu 12.04's
15%
An IT nomad's daily diary
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Kateryna Pruchkovska, 123RF.com
("http://spacewalk.tuxgeek.de/cobbler_api") 06 token = conn.login(user, password) 07 08 cblr_systems = '/root/cobbler.csv' 09 10 if os.access(cblr_systems, os.F_OK): 11 print "Reading system configuration file %s" % cblr_systems 12
15%
Comparing startup times of Linux distros in the cloud
27.09.2021
Home »  Archive  »  2021  »  Issue 65: 7 Em...  » 
Lead Image © Lucy Baldwin, 123RF.com
ssh ubuntu@52.90.56.122; do sleep 1; done ssh: connect to host 52.90.56.122 port 22: Connection refused ssh: connect to host 52.90.56.122 port 22: Connection refused [ output truncated ] Welcome
15%
mpi4py – high-performance distributed Python
30.11.2020
Home »  Archive  »  2020  »  Issue 60: Secur...  » 
Lead Image © liu liming, 123RF.com
): 11 12 s = 0.0 13 s += h * f(a) 14 for i in range(1, n): 15 s += 2.0 * h * f(a + i*h) 16 # end for 17 s += h * f(b) 18 return (s/2.) 19 # end def 20 21 22 # Main section 23 comm = MPI
15%
Resource Management with Slurm
05.11.2018
Home »  HPC  »  Articles  » 
it at Linux Networx in the early 2000s. Over the years, it has been developed by Lawrence Livermore National Laboratory, SchedMD, Linux Networx, Hewlett-Packard, and Groupe Bull. According to the website, Slurm
15%
Resource Management with Slurm
13.12.2018
Home »  Archive  »  2018  »  Issue 48: Secur...  » 
Lead Image © Vladislav Kochelaevs, fotolia.com
remember using it at Linux Networx in the early 2000s. Over the years, it has been developed by Lawrence Livermore National Laboratory, SchedMD [5], Linux Networx, Hewlett-Packard, and Groupe Bull [6
14%
Julia: A New Language For Technical Computing
31.05.2012
Home »  HPC  »  Articles  » 
_mat_stat 3.37 39.34 11.64 54.54 22.07 8.12 rand_mat_mul 1.00 1.18 0.70 1.65 8.64 41.79 Table 1: Benchmark Times
14%
Security first with the Hiawatha web server
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Tatiana Popov, 123RF.com
-fastcgi are running, as expected. Listing 1 Process List root 589 0.0 0.3 142492 3092 ? Ss 20:35 0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on; www

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