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18%
Managing virtual machines
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Igor Klimov, 123RF.com
"creating" $vmname 09 10 virsh suspend rhstorage 11 virt-clone -o rhstorage -n $vmname -f /var/lib/libvirt/images/$vmname.qcow 12 virsh resume rhstorage 13 14 oldmac="52:54:00:B4:DF:EB" 15 newmac
18%
I/O Profiling at the Block Level
27.08.2014
Home »  HPC  »  Articles  » 
 files to buckets.  Now time to count bucket hits.   -------------------------------------------- Histogram IOPS: 2.2 GB 7.6% (7.6% cumulative) 4.5 GB 6.8% (14.4% cumulative) 6.7 GB 6.4% (20.7% cumulative) 8.9 GB 5.9% (26.6% cumulative) 11.2 GB 5.5% (32.1% cumulative) 13.4 GB 5.2% (37.3% cumulative) 15
18%
Developing RESTful APIs
14.08.2017
Home »  Archive  »  2017  »  Issue 40: Lean...  » 
Lead Image © bowie15, 123RF.com
Almost 15 years before Tim Berners-Lee and Robert Cailliau started up the first World Wide Web (WWW) server, James E. White published the idea of the Remote Procedure Call (RPC) with Request
18%
Modern Fortran – Part 2
15.12.2016
Home »  HPC  »  Articles  » 
are over i = 2,n − 1 and j = 2,n −1. Here is how you can write the iteration over the domain using array notation: a(2:n-1,2:n-1) = 0.25 * &     (a(1:n-2,2:n) + a(3:n,2:n) + a(2:n,1:n-2) + a(2:n,3:n
18%
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
18%
Tracing applications with OProfile and SystemTap
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© boing, Photocase.com
("------------------------------------------- ----------------------\n") 09 } 10 11 probe tcp.receive { 12 printf(" %15s %15s %5d %5d %d %d %d %d %d 13 %d\n", saddr, daddr, sport, dport, urg, 14 ack, psh, rst, syn, fin) 15
18%
Code IaC for provisioning of preconfigured virtual environments
26.01.2025
Home »  Archive  »  2025  »  Issue 85: Monit...  » 
Lead Image © vladnikon, 123RF.com
DiskSizeGB: 47 10 } 11 source: { 12 type: 'PlatformImage' 13 offer: 'windows-ent-cpc' 14 publisher: 'MicrosoftWindowsDesktop' 15 sku: 'win11-22h2-ent-cpc-m365' 16 version
18%
ISC 2024 from a Distance
10.06.2024
Home »  HPC  »  Articles  » 
number 2 using 38.698MW, resulting in a low performance/power ratio of 26.15. In comparison, Frontier at number 1 reached about 1.2 exaflops using 22.78MW, resulting in a performance/power ratio of 52
18%
TCP Stealth hides open ports
10.04.2015
Home »  Archive  »  2015  »  Issue 26: OpenS...  » 
Lead Image © momo5287, 123RF.com
|A|P|R|S|F| | 13 | Offset| Reserved |R|C|S|S|Y|I| Window | 14 | | |G|K|H|T|N|N| | 15
18%
Time-series-based monitoring with Prometheus
14.08.2017
Home »  Archive  »  2017  »  Issue 40: Lean...  » 
Lead Image © Juthamas Oonhawat, 123RF.com
. The polling intervals are usually between 5 and 60 seconds; the default is 15 seconds. The metrics are transmitted via HTTP if you use a browser. Prometheus uses the more efficient protocol buffer internally

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