Recommendations for TimeSeries db

Question

preferably open source for storing tick info.

Answer 1

KDB is the industry standard for this kind of thing.

Answer 2

Check out the list at http://en.wikipedia.org/wiki/Column-oriented_DBMS#Implementations .

Answer 3

Python has some package for time series 'database', which uses HDF5 as the underlying 'engine'. http://pytseries.sourceforge.net/