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Backup file always bigger than live db file

I use em.createQuery("objectdb backup", Thread.class); to backup hourly. And the backup file ... Does the database file itself remain the same size? Is the backup size different (either smaller or ... and the backup file are the same size. Any idea why? $ gzip -l backup/file.odb.20210311_060101.gz

Online backup problem

Hi, We are trying to create a servlet that performs database online backup. Unfortunately, even though no exception is thrown, backup files aren't created. When I turn on DEBUG logging in ODB, I ... is normal (part of the class searching process) and it doesn't seem to be related to the online backup

Online Backup in client-server mode

Hello, we have issue with online-backup when using client-server mode. It seems, that it is working the following way. When we run the backup, server is creating tmp file for whole database ... . Can it be improved? In my opinion the server proces should handle whole backup proces and do it as


I have tried using online back to test the backup feature. It's been hour and I still don't see my backup file. I have 1 million record in 1 table as a test. https://www.objectdb.com/java/jpa/tool/backup How long does it usually take for a backup? And are there no temp file during backup to be seen

Online backup with JDO

Hi, I would like to try the Online Backup tool as I am making backups up to now with the not ... is about starting the online backup. The manual suggests starting it via the EntityManager with the code em.createQuery("objectdb backup").getSingleResult(); But how do I start it if I am using

exception during online backup

hi from time to time i get exception during online backup in server/client config: Exception in ... ("objectdb backup"); backupQuery.execute(); but this is not an urgent functionality for us br ... backup extensively while the database is in use (unless of course you already have such a test

How to do an Offline Database Backup?

titled, "Sample JDO Architecture for Follow Up Questions". I desire offline backups. I must close ... until the backup is complete. How can I guarantee that a database is no longer being used? I think I ... JDOUserExceptions. What is the proper way to do an offline database datastore file backup

user defined backup file

We need a way to do a (online) backup to a user defined backup-destination. Maybe in that way: backupQuery.setParameter("targetfile", new java.io.File("/User/Backup/test.objectdb")); which should create a backupfile with the name 'test.objectdb" in the directory '/User/Backup/' or backupQuery

JPA Named Queries

A named query is a statically defined query with a predefined unchangeable query string. Using named queries instead of dynamic queries may improve code organization by separating the JPQL query ... dynamically into the query string and results in more efficient queries. @NamedQuery

Step 1: Create a Maven Web Project

We start by creating a new Maven-WTP dynamic web project in Eclipse: Open the [New Project] dialog box, e.g. by using File > New > Project... Select Maven > Maven Project and click Next. Verify ... you should have a Maven based Eclipse dynamic web project (WTP) with Spring MVC Framework and ObjectDB

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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