Making a database using I/O streams

Question

Hi,
I'm trying to make a site which enables users to post
some information, and save it to a database.
The idea is:
1. User A submit a data using a Shockwave Player.
User A's directory is created, and data resides
in his dir. as a text file.
2. The directory and data is stored in a server.
3. Other users can get access to the data of
User A by clicking on a link, which will return the data
User A has entered previously.
4. Shockwave Player will play accordingly to the data it receives.
I'm trying to avoid using JDBC, and has decide to use I/O streams
to do this.
I have already started and find that this apprach is workable.
But I'm not sure whether its efficient, and would like some advices
on how to go about doing it.
Thanks.

Answer 1

The whole directory is the "database".
For example, UserA has created his profile, then a directory
with the name, "UserA" would be created.
Then, he submitted a comment, "A", which will create a
"A.txt" file inside his directory.
So whenever I need to search for something, I refer to
the name of the files.
Is this approach alright? Would the processing become slower
when there are more and more users?
Thanks.