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Distributed denial of service attacks from and against the cloud
14.11.2013
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Lead Image © leksustuss, 123RF.com
, the DDoS attack on Spamhaus was triggered by 36-byte data packets, each of which triggered a 3,000-byte response. Although a normal desktop PC can handle about 1,000 DNS requests per second, a single DNS
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vSphere 5 vs. XenServer 6
30.11.2025
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© Kozinia, 123RF.com
[2] by VMware started to move into the server racks in the summer of 2011, but while I was researching this article, Citrix suddenly burst onto the scene with the XenServer 6.0 release [3 ... vSphere 5 vs. XenServer 6
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How to configure and use jailed processes in FreeBSD
14.03.2013
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© Corina Rosu, 123RF.com
are available to let administrators manage jails on the host system [6]. Here's a brief look: jail [-i] [-l -u | -U ] : Starts a jail
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Parallel Shells: Run Commands on Multiple Nodes
02.07.2014
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to do on a single node can be done on a large number of nodes using a parallel shell tool. If you try to use a parallel shell on a 50,000-node cluster, however, the time skew could be large enough
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PowerTOP
21.10.2011
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(up to version 2.6.20) use a fixed heartbeat 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
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GNU Parallel: Multicore at the Command Line with GNU Parallel
04.11.2011
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Recent trends in computing are toward more cores doing more tasks at once. These days, you are likely to have a dual- or quad-core CPU in your laptop, and perhaps 4, 6, 12, or 16 cores in your
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Command-line tools for the HPC administrator
22.12.2017
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Lead Image © Vasyl Nesterov, 123RF.com
=> /lib64/libpthread.so.0 (0x00007f5bc524a000) libpgc.so => /opt/pgi/linux86-64/16.10/lib/libpgc.so (0x00007f5bc4fc2000) librt.so.1 => /lib64/librt.so.1 (0x00007f5bc4dba000) libm.so.6 => /lib64
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Denial of Service in the Cloud
12.11.2013
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to CloudFlare CEO Matthew Prince, the DDoS attack on Spamhaus was triggered by 36-byte data packets, each of which triggered a 3,000-byte response. Although a normal desktop PC can handle about 1,000 DNS
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Supercomputing Conference 2024
26.01.2025
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Lead Image © djem, 123RF.com
SC24 took place in Atlanta, GA, November 17-22. As I'm writing this, 17,959 attendees – that's 3,000+ more than last year – registered. More than 500 companies filled the exhibition floor, which
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Linux Local and Network Filesystems
07.01.2024
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    0 349.7M  1 loop /snap/gnome-3-38-2004/143 loop4    7:4    0 485.5M  1 loop /snap/gnome-42-2204/120 loop5    7:5    0   497M  1 loop /snap/gnome-42-2204/141 loop6    7:6    0  81.3M  1 loop

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