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20%
Using the MQTT IoT protocol for unusual but useful purposes
03.12.2015
Home »  Archive  »  2015  »  Issue 30: OpenD...  » 
Lead Image © Heiko Küverling, 123RF.com
. Clients don't actually know whether they really see all the messages that arrive at the broker; the broker ACLS decide this. Messages transport payloads; payload data can also be binary and be up to 256MB
20%
Security first with the Hiawatha web server
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Tatiana Popov, 123RF.com
toolkit for joomla UrlToolkit { ToolkitID = joomla Match base64_encode[^(]*\([^)]*\) DenyAccess Match (<|%3C)([^s]*s)+cript.*(>|%3E) DenyAccess Match GLOBALS(=|\[|\%[0-9A-Z]{0,2}) Deny
20%
Processor and Memory Affinity Tools
14.09.2021
Home »  HPC  »  Articles  » 
 $(find /sys/devices/system/cpu -regex ".*cpu[0-9]+/topology/thread_siblings_list") | sort -n | uniq 0,32 1,33 2,34 3,35 4,36 5,37 6,38 7,39 8,40 9,41 10,42 11,43 12,44 13,45 14,46 15,47 16,48 17,49 18,50 19,51 20,52 21,53 22,54 23,55 24,56 25
20%
Network monitoring with Icinga and Raspberry Pi
17.02.2015
Home »  Archive  »  2015  »  Issue 25: Safe...  » 
Lead Image © AndreaDanti, 123RF.com
web interface, a REST API, and support for a wider array of databases. Because Icinga was forked from Nagios code, it maintains compatibility with Nagios plugins [3]. Some of Icinga's key features are
20%
VAX emulation with OpenVMS
18.07.2013
Home »  Archive  »  2013  »  Issue 15: What’...  » 
Ole Houen, 123RF
downloaded the approximately 3MB ZIP file, create a folder before you unpack, because the archive does not contain one. If you simply unzip, all the files and directories end up in the current directory
20%
Profiling Python code
30.01.2020
Home »  Archive  »  2020  »  Issue 55: AWS L...  » 
Lead Image ©-Yong Hian Lim, Fotolia.com
| 12724500| 46.7333| 3.6727e-06| 3.09%| d = 0.0 155| 50898000| 195.426| 3.83956e-06| 12.94%| for k in range(0, d_num): 156| 38173500| 165.494| 4.33531e
20%
Managing Storage with LVM
07.11.2023
Home »  HPC  »  Articles  » 
can save some partitions or devices for later when the requests for more space arrive. You can also create PVs and just leave them for later. Listing 1 is an example from an Ubuntu 22.04 system
20%
Linux distributions for containers
13.06.2016
Home »  Archive  »  2016  »  Issue 33: IPv6...  » 
Lead Image © tiero, 123RF.com
(Listing 4). Listing 4 New Filesystem Tree # rpm-ostree status TIMESTAMP (UTC) VERSION ID OSNAME REFSPEC * 2015-09-30 12:07:07 22 c4421f1bba
20%
Resource Management with Slurm
05.11.2018
Home »  HPC  »  Articles  » 
nodes, and make sure to do this as a user and not as root. 3. To make life easier, use shared storage between the controller and the compute nodes. 4. Make sure the UIDs and GIDs are consistent
20%
Resource Management with Slurm
13.12.2018
Home »  Archive  »  2018  »  Issue 48: Secur...  » 
Lead Image © Vladislav Kochelaevs, fotolia.com
In previous articles, I examined some fundamental tools for HPC systems, including pdsh [1] (parallel shells), Lmod environment modules [2], and shared storage with NFS and SSHFS [3]. One remaining

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