Read Specific data from text file

Hi

I'm new to DataIntegration part
I have a text file which is basically system log file,so now i wanted to get specific information from the file
Since log file will be unstructured format how i should read specific data from file and store in Database tables..
My output table should be like this
Date time Cpu Usage Memory usage Errors Error Description
21/6/2013 3% 20% 1 Error reason
28/06/2013 9% 66% 10 ,,


Please help out how to achieve this,and what are the concepts i need to know to do this..
Please help me out asap