This is the blog of Ronald Bartels that wanders on and off the subject of problem management (that is how it started). Mostly now the topics are about IoT and SD-WAN.
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Ganglia Monitoring System
Ganglia is a scalable distributed monitoring system for
high-performance computing systems such as clusters and Grids. It is
based on a hierarchical design targeted at federations of clusters. It
leverages widely used technologies such as XML for data representation,
XDR for compact, portable data transport, and RRDtool for data storage
and visualization. It uses carefully engineered data structures and
algorithms to achieve very low per-node overheads and high concurrency.
The implementation is robust, has been ported to an extensive set of
operating systems and processor architectures, and is currently in use
on thousands of clusters around the world. It has been used to link
clusters across university campuses and around the world and can scale
to handle clusters with 2000 nodes.
Find out more about Ganglia at Sourceforge over here.
Firewalls are becoming increasingly important in today’s world. Hackers and automated scripts are constantly trying to invade your system and use it for Bitcoin mining, botnets or other things. To prevent these attacks, you can use a firewall on your system. IPTables is the strongest firewall in Linux because it can filter packets in the kernel before they reach the application. Using IPTables is not very easy for Linux beginners. We have created easywall - the simple IPTables web interface . The focus of the software is on easy installation and use. Access this neat software over on github: easywall
When building a DDoS mitigation service it’s incredibly tempting to think that the solution is scrubbing centers or scrubbing servers. I, too, thought that was a good idea in the beginning, but experience has shown that there are serious pitfalls to this approach. Read the post of at Cloudflare's blog: N o Scrubs: The Architecture That Made Unmetered Mitigation Possible
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