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Consequence of lost ODB$ Files?

Hi, We use the Object DB backup utility for most of our backups, however we also do file system backups. Recently our file system backups have been failing because the .odb$ (write files) have been removed, by the DB Server, during the backup. My question is that if we have a good

Database is locked when in use

a database when it is in active use is unsafe. With ObjectDB 2.x you should use online backup for this purpose. support Support Thanks for the reply. I went through the online backup web page ... .setParameter("target", new java.io.File("c:\\backup")); And i want all the odb files to be placed in

High availability and other pratical questions

of creating a 2 TomEE+ frontend servers cluster with ObjectDB server as a backend DB? Does DB backup backs all objects including indexes? If yes, is there a way to backup data only? And. is there a way to backup specific entities only? What is the overhead of online backup? What is the overhead

Some technical questions

transaction either commits or rolls back? Since ObjectDB implements online backups, does it implement something like MVCC, so it can see the data at the time the backup was started (to have consistent backup ... commit are invisible to other users. > Since ObjectDB implements online backups, does it implement

Class loading problem with private packages in OSGi environment

] [ObjectDB 2.6.0] javax.persistence.PersistenceException Failed to generate dynamic type com.btc ... : Failed to generate dynamic type com.btc.ep.architecture.ccode.bl.impl.CodeArchitectureImpl at com ... dynamic type com.btc.ep.architecture.ccode.bl.impl.CodeArchitectureImpl (error 361) at com.objectdb

Need disk usage and delete some old files

.getServerFileSystem(     host, port, username, password, path, false); support Support what about backup ? can we make backup by only copying objectdb file? if we make backup by objectdb file , will it make problem for future release of objectdb? kadirbasol Kadir BASOL You can read about backup on this manual

ClassCastException on closing PersistenceManager

has no errors) with an older backup and the code was running without errors. However it worries me how did ... (instead of a backup database) should be safe. support Support Today I got a similar but different ... .JDOConnection.close(Unknown Source) I had to return again to a working backup of the DB. It is quite

Multi-tenant setup

request to appropriate database, how to dynamically add new database or schema. There are lot ... managers in Java EE and JPA is static. ObjectDB supports a dynamic schema, if your application generates entity classes dynamically (e.g. using CGLIB, javassist, asm, bcel). However, you will lose

Query fails with failed to read

1142, issue 1682. At least issue 1682 is related to online backup and was fixed in version 2.6.3. Are you using online backup when the exception is thrown? Any other special activity at that time ... your application). support Support we have it now 5-10 times per day. There is not any backup activity

InternalException caused by OOM: Metaspace

.objectdb.o.InternalException: com.objectdb.o.UserException: Failed to generate dynamic type objectdb.java.util.ArrayList com.objectdb.o.UserException: Failed to generate dynamic type objectdb.java ... a dynamic wrapper class for ArrayList (objectdb.java.util.ArrayList) If the JVM MaxMetaspaceSize

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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