Fast Object Database for Java - with JPA/JDO support

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48

Database Doctor

database file Checks a given ObjectDB database file, verifies that it is healthy and valid, and if the file is not valid (it is corrupted), produces detailed diagnosis report of all the errors. Repair of a corrupted ObjectDB database file Repairs a corrupted ObjectDB database file by creating a new
45

JPA Persistence Unit

a persistence.xml file, which has to be located in the META-INF directory in the classpath. One persistence.xml file can include definitions for one or more persistence units. The portable way ... a persistence unit. The following persistence.xml file defines one persistence unit:
41

Server User List

configuration file contains the following element: files="20" disk-space="5mb" /> files="20" disk-space="5mb" />
38

Server Configuration

is affected also by other elements in the configuration file, particularly the and the configuration elements. The default configuration file contains the following element:
36

[ODB1] Chapter 8 - ObjectDB Server

mode are discussed in Section 1.2. Because the JDO API and the format of the database file ... , packaged in the odbse.jar file. The jar file contains the entire ObjectDB implementation including support for embedded mode. In order to use client server mode, you have to install the odbse.jar file
34

Is ObjectDB scalable? What are its limitations?

supports: Database file size up to 128 TB (= 131,072 GB = 134,217,728 MB). Up to 2,147,483,648 entity classes per database file. Up to 2,147,483,648 indexes per database file. Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections (limited by operating system resources).
30

[ODB1] Chapter 9 - ObjectDB Explorer

ObjectDB development jar file (odbfe.jar / odbee.jar / odbse.jar), located in ObjectDB's lib directory. Because this file is an executable jar, on most systems, you can double click on it to start ... . The following procedure is recommended, copy the file to the bin subdirectory, edit the copy and use it to start
23

Database Management Settings

which are relevant on the server side and in embedded mode. The default configuration file contains the following ... initial="256kb" resize="256kb" page="2kb" /> The element specifies the database file and page size settings: The initial attribute specifies an initial size of every new database file
22

Backup file always bigger than live db file

I use em.createQuery("objectdb backup", Thread.class); to backup hourly. And the backup file is always getting bigger even if the db file is not getting bigger. Why is that? Trianglehead Json Error Does the database file itself remain the same size? Is the backup size different (either smaller or
22

odb files and config file

/. But there were no obd files in it. I'm getting my EntityManager by doing this: EntityManagerFactory emf = Persistence.createEntityManagerFactory("$objectdb/db/account.odb"); I looked for the odb files and found it somewhere in my workspace metadata (eclipse plugins). What can I do to save the odb files in src

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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