How would be better to implements blog on me site

I'm doing web application for many users. Application will has many modules - register, search, question-answer, forum and blog.

I'm going to implement blog module for each users registered on my site.

Blog can has a title and body. The maximum length of body can not be more than 6000 symbols. How better to do it (blog) ?

Which type for body will be better varchar or blob? Or may be realy better do it in second d开发者_StackOverflow社区atabase separately from the main webapp db? Or use external service if such a service exists?

PS: technologies: java, spring, JPA, PostgreSQL

For storing texts I suggest using PostgreSQL's text datatype for the field. I think using a second database is unnecessary. For such common scenarios like blogging, I suggest using customizable third-party modules instead of reinventing the wheel. Have a look at Pebble at http://pebble.sourceforge.net/