How to save java serialized objects into database?

Question

Now, I have 200k objects in java, each of which have an unique ID. I will access them randomly later. So I want to save these objects into a database. Which kind of database should be a good choice? The relational database(MySQL) or some NoSQL database?

Answer 1

I remember once working on a project where someone suggested that the ORM layer was unnecessary and over complicated the whole design.
He proposed that binary serializations should be written to a database table using the Object Id/Hash code, and a blob for the serialized object.

The problem that was pointed out with that approach occurs when the structure of a serialized Class changes, then all of the previously serialized object instancess need to be migrated/evolved.

So beware of storing a binary/serialized representation of an object for a long period of time.

Answer 2

最后，我使用Berkeley DB，这是一个嵌入式数据库，只能通过编程语言进行访问。