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38%
Monitoring Performance with sar
05.03.2014
Home »  Articles  » 
 -s 12:00:00 -e 13:00:00 Linux 3.5.0-43-generic (hercules)         02.12.2013      _x86_64_        (2 CPU)    12:05:01        CPU     %user     %nice   %system   %iowait    %steal     %idle 12
38%
Collecting and evaluating performance data over a period of time
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Sergey Nivens, 123RF.com
jcb@hercules:# sar -u -f /var/log/sysstat/sa02 -s 12:00:00 -e 13:00:00 Linux 3.5.0-43-generic (hercules) 02.12.2013 _x86_64_ (2 CPU) 12:05:01 CPU %user %nice %system
38%
Improved Performance with Parallel I/O
24.09.2015
Home »  HPC  »  Articles  » 
Understanding the I/O pattern of your application is the starting point for improving its I/O performance, especially if I/O is a fairly large part of your application’s run time. ... seconds) and 80% parallel (800 seconds), but with only one process. Amdahl’s Law says the speedup is 1.00. As the number of processes increase, the wall clock time of the parallel portion decreases ... Understanding the I/O pattern of your application is the starting point for improving its I/O performance, especially if I/O is a fairly large part of your application’s run time.
38%
Linux device mapper writecache
30.01.2020
Home »  Archive  »  2020  »  Issue 55: AWS L...  » 
Lead Image © lightwise, 123R.com
=test test: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=32 fio-3.12 Starting 1 process Jobs: 1 (f=1): [w(1)][100.0%][w=654MiB/s][w=167k IOPS][eta 00m:00s
38%
Monitor Your Nodes with collectl
28.03.2012
Home »  HPC  »  Articles  » 
/log/collectl -r00:00,7 -m -F60 -s+YZCD --iosize ################################################################################ # Collectl: V3.6.1-4 HiRes: 1 Options: -p localhost-20120310-133840.raw.gz -P -f
38%
Linux Writecache
19.11.2019
Home »  HPC  »  Articles  » 
, ioengine=libaio, iodepth=32 fio-3.1 Starting 1 process Jobs: 1 (f=1): [w(1)][100.0%][r=0KiB/s,w=1401KiB/s][r=0,w=350 IOPS][eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=3104: Sat Oct 12 14:39:08 2019   write: IOPS=352
38%
John the Ripper
22.08.2011
Home »  Articles  » 
 
-based algorithm and a small word list: $ john -single passfile.txt Loaded 2 password hashes with 2 different salts (FreeBSD MD5 [32/64 X2]) guesses: 0 time: 0:00:00:01 100% c/s: 9433 trying: hken1900 Finally ... Easy to remember but difficult to guess isn’t just a catchy phrase for choosing passwords, it’s the law of the Net. Learn how to check your password using a tool network intruders use every day
38%
Checking password complexity with John the Ripper
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
$ john -wordlist:password.lst passfile.txt 02 Loaded 2 passwords with 2 different salts (FreeBSD MD5 [32/64]) 03 admin (root) 04 t-bone (khess) 05 guesses: 2 time: 0:00:00:00 100% c/s
37%
Monitor your nodes with collectl
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© nobeastsofierce, 123RF.com
YZCD 03 # DaemonOpts: -f /var/log/collectl -r00:00,7 -m -F60 -s+YZCD --iosize 04 ################################################################################ 05 # Collectl: V3.6.1-4 HiRes: 1 Options
37%
Frontier Supercomputer Retains Lead on TOP500 List
16.11.2022
Home »  News  » 
 
— This HPE Cray EX system at the EuroHPC center at CSC in Finland underwent a major upgrade to hold on to the #3 spot, with a score of 0.309 EFlop/s. Leonardo — At #4, the new Leonardo system installed ... The Frontier system is the first U.S. supercomputer to achieve exascale performance.

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