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52%
Filesystem Murder Mystery
09.04.2019
Home »  Archive  »  2019  »  Issue 50: Bpfilter  » 
Lead Image © Lucy Baldwin, 123RF.com
in mv ubuntu@aws:~/slow-mv$ strace -t mv 3GB.copy 3GB 19:00:09 execve("/bin/mv", ["mv", "3GB.copy", "3GB"], 0x7ffd0e7dddf8 /* 21 vars */) = 0 19:00:09 brk(NULL) = 0x55cd7d1ce000
51%
Profiling Python Code
09.12.2019
Home »  HPC  »  Articles  » 
, it already has several functions. To better illustrate profiling the code, I converted it to simple serial code and called it md_00 1 .py (Listing 5). Then, I profiled the code with cProfile: $ python3 -m c
49%
Speed up your MySQL database
11.02.2016
Home »  Archive  »  2016  »  Issue 31: Tunin...  » 
Lead Image © Mikhail Dudarev, 123RF.com
B/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 2.00 8.00 2.00 9500.00 16.00 151948.00 31.99 1.07 0.11 4.00 0.11 0.09 88.40 If your read or write
48%
Greylisting with Postgrey
22.06.2012
Home »  Articles  » 
 
3600 0-01:00:00 5 6400 0-01:46:40 6 10000 0-02:46:40 7 14400 0-04:00:00 8 19600 0-05:26:40 9 25600
48%
Understanding the Status of Your Filesystem
18.06.2014
Home »  HPC  »  Articles  » 
.29 14.2 14–28 8,768 2.26 16.49 28–56 25,377 6.54 23.03 56–112 8,101 2.09 25.12 112–168 47,729 12
47%
Parallel Programming with OpenMP
21.11.2012
Home »  HPC  »  Articles  » 
) :: start_time, end_time 018 INTEGER :: m, iter = 0 019 INTEGER i, j 020 REAL( kind = 8 ) seconds, seconds2, elapsed_time 021 PUBLIC 022 023 CONTAINS 024 SUBROUTINE wtime(wtime2) 025 026
46%
Open Network Operating System
11.10.2016
Home »  Archive  »  2016  »  Issue 35: Persi...  » 
Lead Image © Rade Lukovic, Fotolia.com
.0 and 1.3 (the variants mainly supported by providers), NETCONF [7], and the Open vSwitch Database (OVSDB) management protocol [8] for device configuration. As Figure 1 shows, ONOS is constructed from
45%
Network analysis with the Bro Network Security Monitor
05.12.2014
Home »  Archive  »  2014  »  Issue 24: Visua...  » 
Lead Image © Aleksey Mnogosmyslov, 123RF.com
/bro/bin/bro-cut -d 2014-10-30T03:00:29-0500 192.168.1.2 67 udp DHCP 2014-10-30T03:12:12-0500 192.168.1.2 80 tcp HTTP 2014-10-30T03:14:29-0500 192.168.1.2 53 tcp HTTP According to Listing 8
44%
Listing 2
21.08.2012
Home »  HPC  »  Articles  »  Warewulf 4 Code  » 
 
.6 M Is this ok [y/N]: y Downloading Packages: (1/5): apr-1.3.9-3.el6_1.2.i686.rpm                                            | 128 kB     00:00 (2/5): expat-2.0.1-11.el6_2.i686.rpm
43%
Arp Cache Poisoning and Packet Sniffing
05.09.2011
Home »  Articles  » 
 
can see how the arp cache poisoning works: $ sudo nemesis arp -v -r -d eth0 -S 192.168.1.2 \ -D 192.168.1.133 -h 00:22:6E:71:04:BB -m 00:0C:29:B2:78:9E \ -H 00:22:6E:71:04:BB -M 00:0C:29:B2:78:9E

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