I was asked to prototype two ETL frameworks. The requirements are as follows: 

* Open Source
* Available to Linux
* Maintained
* Logs can be viewed on web browser (nice to have)
* Written in Perl, Python, Ruby or Java

The raw file can be anything (excel, csv, html page etc..)
The target database is MySQL.

Dont just drop names, please indicate the advantages/disadvantages based from your experience.

Thanks!