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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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
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 a detailed diagnosis report of all the errors. Repair of a corrupted ObjectDB database file Repairs a corrupted ObjectDB database file by creating a new
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: <?xml version="1.0
configuration file contains the following <users> element: <users> <user username="admin" password="admin ... |modify|create|delete"> <quota directories="5" files="20" disk-space="5mb" /> </dir ... ="access|modify|create|delete"> <quota directories="5" files="20" disk-space="5mb" /> </dir
is affected also by other elements in the configuration file, particularly the <users> and the <ssl> configuration elements. The default configuration file contains the following <server> element: <server> <connection port="6136" max="0" /> <data path="$objectdb/db-files
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).
that are relevant on the server side and in embedded mode. The default configuration file contains the following ... initial="256kb" resize="256kb" page="2kb" /> The <size> element specifies the database file and page size settings: The initial attribute specifies the initial size of every new database file
ObjectDB can record its internal engine operations in special binary recording (journal) files ... & Recording Files When recording is enabled, ObjectDB maintains for every database file a recording directory whose name is the name of the database file with the odr (ObjectDB Recording) suffix. By
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
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