Raft Consensus algorithm. Prezetacja: http://thesecretlivesofdata.com/raft/ Dokładniejszy opis: http://raftconsensus.github.io/

http://www.comp.nus.edu.sg/~stevenha/visualization/index.html

This page links to various Linux performance material: <div> <span style="text-align:justify"><font color="#000000" face="Garamond, Baskerville, Georgia, Times New Roman, Times, serif" size="3"><span style="line-height:20.799999237060547px"><br /></span></font></span> </div> <div> <span style="text-align:justify"><font color="#000000" face="Garamond, Baskerville, Georgia, Times New Roman, Times, serif" size="3"><span style="line-height:20.799999237060547px"><a href="http://www.brendangregg.com/linuxperf.html"><a href="http://www.brendangregg.com/linuxperf.html" >http://www.brendangregg.com/linuxperf.html</a></a></span></font></p> <p> </span></div> <div> </div> <div>

The database was performing poorly after a system upgrade, and disk I/O inflation (a massive increase in the number of I/O operations submitted) was suspected. There can be many causes for this: a worse cache-hit ratio, record-size inflation, readahead inflation, other applications, even other asynchronous kernel tasks (file system background scrubs). The question was: which one, and how do we fix it? http://lwn.net/Articles/608497/

This is the blog of Fabian “ryg” Giesen(RAD Game Tools in Kirkland/WA as a programmer). He is also active in the demoscene group Farbrausch and have written some useful tools and other pieces of code, most of which are available on his homepage. http://fgiesen.wordpress.com/