The 4th OSS Conference of the Ministry of Knowledge Economy

This week, I was invited as a special lecturer and panel speaker at the 4th OSS Conference of the Ministry of Knowledge Economy (Korea). It was fun and here's a few pictures.


Trustin Lee (Netty), Minsuk Lee (Assistant Dean of NHN Next), Edward J. Yoon (Apache Hama)


Edward J. Yoon (윤진석 @ 공개소프트웨어데이)

Flume NG Performance

According to Flume wiki[1], it has capable of achieving approx. 70,000 events/sec on a single machine (high-end level) at the time of the test with no data loss (300 bytes per event). If you can't imagine how big 70,000 events/sec is, see this "Tweets per second"[2].

1. https://cwiki.apache.org/FLUME/flume-ng-performance-measurements.html
2. http://yearinreview.twitter.com/en/tps.html

Bioinformatics, Big Data, and MapReduce

Today suddenly someone asked me about Bioinformatics, Big Data, and MapReduce, I said "you should be more concerned about data complexity than size. And also, studying GraphLab or Hama will be helpful" ... :/

Memorise these, and you could pass yourself off as an expert.

무한의 세계

무한 집합의 크기 Cardinality , 즉 원소의 개수를 수학에서는 '농도'라고 말한다. 유한 집합의 크기는 그대로 원소의 개수 이지만, 무한 집합의 경우는 원소의 개수를 낱낱이 셈하는 것은 불가능하기 때문에 '농도'라...