Here is a good video from Google 

Testing Strategies Overview
I believe that I don’t need to stress out how important testing is. So, lets cut the crap and talk about the challenging areas related to this subject. Here are the things I want to talk about

Write your unit test first then code

It is the core concept [...]

Continue reading " How to test my system? "

Get yourself familiar with concurrency programming
When I interview my candidates, I like to ask questions related to multi-threading. I found out that it is a good topic to differentiate out a hardcore programmer from application-oriented programmer. I am not saying I am looking for someone who could write the concurrency library as efficient as the [...]

Continue reading " Concurrent Programming - Part 1 Synchronization "

Cloud computing is a way to leverage the resources in the cloud (internet) instead of your local box. We may hear the term SaaS (software as a service) and HaaS (hardware as a service). They are combined moving us to an new generation of computing, called utility computing. You can imagine software and computing power [...]

Continue reading " Our future - Cloud Computing "

Export schema/ data out from mysql
To export schema and/or data, you can use mysqldump command:

mysqldump -u [username] -p[password] -d [schema_name] > [filename].sql

-d means no data (just gives me the schema).
-B is needed for multiple schema output
-h (hostname)

Export data out from postgresql

Export table data from postgresql to csv format
Backup and restore database in postgresql

However, if you want [...]

Continue reading " Common DBA jobs "

Data can be represented in text format for human and binary format for computer. Here my focus will be on text representation.

For application, we commonly use XML because:

Its self-documenting format describes structure and field names as well as specific values. And it is easily digested by both human and machine.
It is platform-independent, thus relatively immune [...]

Continue reading " Data representation "