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27%
Identify troublesome energy consumers with PowerTOP
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Elena Elisseeva, 123RF.com
of 1,000Hz. On each tick, the kernel wakes up the processor and checks for any work to do. This approach obviously limits power savings. Starting with kernel 2.6.21, however, regular ticks are gone
27%
Service management by the book
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Michael Flippo, Fotolia.com
is unlimited, allowing flexibility while your help desk grows. The TOPdesk Professional basic license starts at 250 supported end users and can be extended with an end-user license up to 500, 1,000, 1
27%
Fast system management from Puppet Labs
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Artmann Witte, fotolia.com
is capable of executing jobs at a very high speed. I have used the framework in an environment with more than 3,000 systems; running a job on all of the nodes rarely took more than 30 seconds. YAML
27%
Expand your sphere with a piece of Google
30.11.2025
Home »  Archive  »  2011  »  Issue 4: Secure...  » 
© artida, 123RF.com
data in the datastore. A maximum 2,000 email messages dispatched per day. Applications unreachable at a fixed IP address. If you exceed any of these limits, Google stops further access
27%
Getting started with I/O profiling
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Photosani, Fotolia.com
InfiniBand for the compute node storage traffic or will GigE or 10GigE be sufficient? Should I use 15,000rpm drives or 7,200rpm drives? Do I need SSDs (solid state drives)? Which filesystem should I use
27%
A simple approach to the OCFS2 cluster filesystem
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Kheng Ho Toh, 123RF.com
to take into account when designing your storage. The number of subdirectories in a directory is restricted to 32,000. OCFS2 stores data in clusters of between 4 and 1,024Kb. Because the number of cluster
27%
The next generation of Internet connectivity
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
ktsdesign, 123RF.com
are not. In most cases you can't really contact the 6to4 provider for support, so if you have a problem, it won't easily be fixed. Google has stated that approximately 0.01 percent (one in 1,000) machines
27%
Script utilities in depth: grep, awk, and sed
30.11.2025
Home »  Archive  »  2011  »  Issue 4: Secure...  » 
© jirkaejc, 123RF.com
that it locates: oops::000:100::/:/bin/sh This password file entry allows someone to log in as the root-equivalent user oops without a password: grep '.*:.*:00*:' /etc/passwd | awk -F: 'BEGIN {n=0}; $1
27%
Warding off the rise of VoIP spam
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Izaokas Sapiro, 123RF.com
of 480Kbps, which calls for a 512Kbps line. Assuming a line rental of EUR 30 (US$ 35-40), the basic rate for the marketer would be 0.004 cents per call. In other words, 5,000 VoIP calls costs the same
27%
High availability clustering on a budget with KVM
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Yulia Saponova, 123RF.com
-is-bridged -j ACCEPT Finally, service network restart parses the configuration and starts the bridge device: # brctl show bridge name bridge id STP enabled interfaces br0 8000.000

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