Fast Object Database for Java - with JPA/JDO support

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14

Database(*.odb) file size on disk

Hello, we have questions about the file size of ObjectDB database on disk. Can you tell ... memory always used by new entities? -Will be the database file automatically reduced? We have created ... are reused but the the file not resized. The database is at the end empty again, but larger than the initial
14

Using multiple databases

Is it possible for an ObjectDB PersistenceManger/EntityManager to connect to more than one database at a time? Also, can objects in one database reference objects in another database (e.g. through globally unique identifiers)? jonb Jon Brumfitt You can use as many databases as needed at the same
14

How to define database structure and insert some initial objects from scratch

the initial database structure of our application? We know objectdb is all about objects and probably doesn't ... jdbc driver for ETL software like Kettle? How about migrating data from another database system? Thanks in advance! josevilla Jose Lora To populate the database you will have to write Java code
14

unable to update table in slave server database

done in objectdb configuration file. <database> database> Any help would be greatly appreciated. Thanks! objdbuser In ObjectDB clusters slave databases ... of the master and the slave database. As slave database is storing data in replication path
13

Database absolute filepath

Is there a line of code that can be used to print out my databases absolute path? I have set it as follows: EntityManagerFactory emf = Persistence.createEntityManagerFactory("$objectdb/database/people.odb"); However, the data being shown in \lib\objectdb\database\people.odb is different
13

Multi-Threading/Distributed-Database Questions...

Greetings ObjectDB team, All below questions assume a very large database (~1,000,000,000 objects ... : Is it true that two read-only JPQL queries accessing the same database file actually run simultaneously ... to use two database files on two different physical hard disks while still being able to cross reference
13

Master database switching to read-only mode, possibly caused by slave failure

We had a database failure causing a production outage. Both master and slave databases have failed ... database failed first and possibly caused the master to switch to read-only mode. The sequence ... - MASTER instance stopped responding to write requests. All requests sent to the database during 3
13

Database File Compression

ObjectDB database files are usually smaller than database files of other Database Management Systems (object databases and relational databases) but additional internal compression is still possible ... . So the effect of using compressed ObjectDB database file on performance is unknown yet. support Support
13

Database Inconsistency or corruption

entity. 2-) Problem Description I initialized the database with some ObjectValues. Persisting new ... the ObjectValue from the database, all values are lost. ObjectValue ID:=100, TYPE:=Person, REVISION:=2 ... , since you will get the update applied on the database, and after loading the up to date data from
13

Is ObjectDB the only object database that supports JPA?

Other Object database doesn't support JPA? Manikandan ManikandanPalaniappan JPA is designed as ... databases. For example, user defined primary keys and composite primary keys are features of RDBMS (relational databases), which are not supported by most object databases. ObjectDB does support

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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