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To open source, or not to open source

Hi, We are currently using db4o with a commercial licence, but finds it very frustrating after they have been taken over by Versant. The development of db4o is going very slow and major bugfixes are not been backported to stable releases, but only put into bleeding edge branches

Listing large number of complicated objects with paging.

.setFirstResult(start).setMaxResults(count).getResultList(); is quite slow. Well, after first request

explorer locks local database in readonly mode

hi, my current use case is: execute unit test, verify results in explorer. my problem, i have to close the explorer before every run, and open it again after the tests are done. this slows down the whole process. i opened the database in readonly mode, but the file will be locked by the explorer

Failed to synchronize replicated database

Tomas Hamal 1. Copying the existing database file automatically is not complex but might be slow

Insertion Speed Rate and Batch Load

/ObjectDB/bin/objectdb.jar Maybe the transaction is too slow, that cause emf.close() catch a error

Objectdb EntityManagerFactory problem

, creating an EntityManagerFactory is relatively slow. It is usually better to use

Join query problem with new statetment

are returned and everything works fine, but is quite slow - that is expected, because of some high number

database corrupt

enabled="true" sync="true" path="." mode="write" /> This is rarely used, may slow your application

Multiple MEMBER OF query

and slow unnecessarily (e.g. for the OR query in your post), so any change requires careful planning

ObjectDB 2.8.6_02

Fixed a bug in the new option to slow backup in client-server mode (see feature request #2681).

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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