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Multi-Threading/Distributed-Database Questions...

Greetings ObjectDB team, All below questions assume a very large database (~1,000,000,000 objects ... objects on both, i.e. distributed database/graph of objects ? Kind Regards and Thanks ! geekox86 ... and multithreading in this previous thread. References from objects in one database to objects in

Removing objects where ManyToMany relationships exist

well enough, even if there's millions of Entity and OtherEntity objects in the database ... ; } Now consider a number of OtherEntities are removed from the database. What happens with the numerous TreeSets for all the existing Entities in the database? Are OtherEntities that are referenced in

Using multiple databases

at a time? Also, can objects in one database reference objects in another database (e.g ... to objects in another database are not supported. Of course, you can keep IDs of the other database objects and manage the references yourself. You will not be able, however, to run one query on both databases. support Support

Open several objectdb databases the same time

We tried to open objectdb databases from application and got following error: Attempt to open a database file 'D:\tmp\PAT-707\TC_9_2_3_1_8b@2015-09-17_12.08.15\TC_9_2_3_1_8b@2015-09-17_12.08.15.pa3 ... ) Caused by: com.objectdb.o.UserException: Attempt to open a database file 'D:\tmp\PAT-707\TC_9_2_3_1_8b

Question: remove and recreate an object, do the references survive ?

We want to move unused objects to a second database. We want to copy the objects and delete them in the production database. If we then recreate the objects with the same primary key as it has been before, do the references from other objects survive this (assuming that no Doctor is done in between

ObjectDB's Database Doctor Incorrect Error Report

to the object and the existence of the object. CBE CBE There is indeed a problem with this database file ... Am I reading this correctly? It seems that Doctor is telling me that one of my objects is missing. Looking at the database with ObjectDB's Database Explorer though seems to show that the reference

Storing objects problem

I want to save this object to database: @Entity public class Device {     private String name ... for that children devices and they don't have their children devices. I'm new to this object database so I ... > children; } An object contains a list of other devices which are also type Device. My root device

object creation during pmf.getPersistenceManager()

Hi We have observed that during pmf.getPersistenceManager(), objectdb is creating object instances ... that transaction we will create instances for all classes. The number of objects created during this invocation is really huge, that causes OutOfMemory during commit (memory for jvm 1,4GB). The object

How force always recreate database on redeployment.

Is there some easy way to force recreation/deletion of the current database on deployment of a web ... . Currently, to avoid multiple models in the database, I have to undeploy from Glassfish, stop the server, delete the database file, re-start the objectdb server, re-run the web app, which is tedious

Cannot insert more than about 2^20 objects

Hi I have a DB with 4 entities and a total of 4 index. Once I reach 1048565 total objects in the whole DB, i am unable to insert more object, although i get NO error message nor exceptions. Doctor said Db is fine (see below) I notice that 1048565 objects + 4 entities + 4 ID indexes + 4

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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