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72%
Using loop directives to improve performance
05.02.2019
Home »  Archive  »  2019  »  Issue 49: Anato...  » 
Lead Image © orson, 123RF.com
C !$acc parallel !$acc loop do i=1,n a(i) = 0.0 enddo!$acc end parallel #pragma acc parallel{ #pragma acc loop for (int i=0; i < n; i++) { a[i] = 0.0 }} When the compiler
72%
PowerTOP
21.10.2011
Home »  Articles  » 
 
as experimental. To put PowerTOP 2.0 to meaningful use, you’ll need at least kernel 2.6.36 and preferably 2.6.37. If you have an older kernel, stick with PowerTOP 1.x. At this time, I had to download the source ... Many applications interrupt the CPU when it tries to sleep. PowerTOP not only identifies these evildoers but also provides tips on how to get rid of them.
72%
Understanding Privilege Escalation
13.12.2011
Home »  Articles  » 
 
with SSH access and try to escalate the privileges. Of course, this article can only cover a small fraction of the privilege escalation techniques in use today, but it should give some indication of how
72%
Read-only File Compression with SquashFS
14.06.2017
Home »  HPC  »  Articles  » 
 uncompressed inode table size (16846 bytes) Directory table size 2199 bytes (2.15 Kbytes)         63.72% of uncompressed directory table size (3451 bytes) Xattr table size 54 bytes (0.05 Kbytes)         100.00% of
72%
Read-only file compression with SquashFS
14.08.2017
Home »  Archive  »  2017  »  Issue 40: Lean...  » 
Lead Image © modella, 123RF.com
) Directory table size 2199 bytes (2.15 Kbytes) 63.72% of uncompressed directory table size (3451 bytes) Xattr table size 54 bytes (0.05 Kbytes) 100.00% of uncompressed xattr table size (54
71%
SSHFS for Shared Storage
15.09.2020
Home »  HPC  »  Articles  » 
with almost all distributions. The SSHFS website has good instructions on how to do the build and install. The simplest way to check whether sshfs is installed is to run the command, $ sshfs -V sshfs
71%
Userspace secure filesystem
30.11.2020
Home »  Archive  »  2020  »  Issue 60: Secur...  » 
Lead Image © mipan, 123RF.com
with almost all distributions. The SSHFS website has good instructions on how to do the build and install. The simplest way to check whether sshfs is installed is to run the command (e.g., on Ubuntu 18
71%
Protect Your Servers with Nmap
23.07.2012
Home »  Articles  » 
 
If you've ever had to test how secure your servers are, you've almost certainly come across the ever-flexible Nmap (Network Mapper), which is used by sys admins to help protect their servers ...  for brevity]            8   10.59 so-4-2-0.mpr3.pao1.us.above.net (64.125.28.142)            9   11.00 metro0.sv.svcolo.com (208.185.168.173)            10  9.93  scanme.nmap.org (64.13.134.52)            Nmap
71%
Kea, the ISC's successor to the DHCP daemon
03.08.2023
Home »  Archive  »  2023  »  Issue 76: Energ...  » 
Photo by Markus Winkler on Unsplash
://localhost:8000 $ curl -s -H "Content-type: application/json" -X POST -d '{ "command": "lease4-add", "arguments":{"ip-address":"172.17.6.8", "hw-address": "52:54:00:8a:17:9f"}, "service": [ "dhcp4" ] }' http
71%
Tuning I/O Patterns in Python
18.12.2013
Home »  HPC  »  Articles  » 
In the third article of this three-part series, we look at simple write examples in Python and track the output with strace to see how it affects I/O patterns and performance. ... 2P). Listing 2P: Python Code Example with Output in Loop (One-by-One) 1 #!/usr/bin/python 2 3 if __name__ == "__main__": 4 5 local_dict = {'x':0, 'y':0, 'z':0,'value':0.0}; 6 7 counter ... In the third article of this three-part series, we look at simple write examples in Python and track the output with strace to see how it affects I/O patterns and performance.

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