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Sunday, June 19, 2016

Investigating into apache cassandra 1.2 jmx metrics connection type warn logging

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Recently I got the opportunity to upgrade a production cassandra cluster from 1.1.12 to 1.2.19 and during the midst of upgrading, I notice...
Saturday, June 18, 2016

yet another upgrade to cassandra virtual nodes fail

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Recently I was assigned a project to upgrade cassandra from 1.1 to 1.2 (I know it is ancient cassandra but who cares? we just want it to wor...
Friday, June 17, 2016

trying out aggregations on mongodb

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Today, we will again look into mongodb but on the specific topic of aggregation . Aggregations operations process data records and retur...
Sunday, June 5, 2016

java collection framework

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Once I was asked by a company what is the data structure in java and i was not prepare at all, but as usual, why bother remembered every det...
Saturday, June 4, 2016

First look into sector/sphere

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Wikipedia excerpt Sector/Sphere is an open source software suite for high-performance distributed data storage and processing. It can be ...
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Friday, June 3, 2016

First look into ECL (enterprise control language)

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It's been a while for a quiet moment since I actively blogging due to the fact of family issue. But I hope things will goes even smooth...
Friday, January 1, 2016

Happy new year 2016

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Happy new year 2016 to everyone! In the past year 2015, many things has happened, a lot of blogs published mainly big data articles and ja...