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25%
Look for Bottlenecks with Open|SpeedShop
21.12.2011
Home »  HPC  »  Articles  » 
. In this article, I will describe how to use Open|SpeedShop through step-by-step examples illustrating how to find a number of different performance bottlenecks. Additionally, I will describe the tool’s most common
25%
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
25%
Software-defined storage with LizardFS
17.06.2017
Home »  Archive  »  2017  »  Issue 39: Conta...  » 
Lead Image © larisa13, 123RF.com
FS. Ceph is primarily an object store – comparable to the Amazon S3 API – that can also provide block devices, and the CephFS POSIX-compliant filesystem is more of an overlay of the object store than
25%
Manage logical volumes with GUI tools
09.10.2017
Home »  Archive  »  2017  »  Issue 41: Kuber...  » 
Lead Image © grafner, 123RF.com
to clarify whether it can be used without extensive background knowledge. LVM GUI Red Hat originally developed LVM GUI for logical volume management [3] in their products, although other distributions also
25%
HPC fundamentals
16.08.2018
Home »  Archive  »  2018  »  Issue 46: CMS S...  » 
Lead Image © Kasia biel, 123RF.com
] command ... -S return largest of remote command return values -h output usage menu and quit -V output version information and quit -q list
25%
Microsoft Exchange replacement
20.06.2022
Home »  Archive  »  2022  »  Issue 69: Terra...  » 
Photo by Gabriel Crismariu on Unsplash
: It is not based on open standards, and it uses proprietary protocols and APIs like MAPI [3] for internal communication. Clients for Exchange are pre-installed on all Windows, Android, and Apple devices
25%
OpenStack workshop, part 1: Introduction to OpenStack
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
's S3. Glance supports several image formats: Besides the classic KVM QCOW format, Glance also supports VMware images out of the box. It can basically run operating system images of anything that runs
25%
Flexible user authentication with PAM
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Ana Vasileva, Fotolia.com
but from a directory service. This task can be simplified by deploying PAM [1]. Modular Authentication Originally developed in the mid-1990s by Sun Microsystems, PAM is available on most Unix-style systems
25%
Professional backup solutions compared
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Kamil Macniak, 123RF
used a virtual machine on a VMware ESX server. The physical underpinnings were a ProServ II server by ExuS Data with two Xeon quad-core processors and 16GB of RAM (Figure 1, top
25%
Green IT
24.10.2011
Home »  Articles  » 
 
). Figure 1: The researcher’s equations covered CO2 emissions during the entire product lifecycle: manufacturing, operation of a 120-watt machine eight hours a day for six years, standby (14 watts, 16 hours

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