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13

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
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13

Queries are slow on a large database

Hi, I have a 12GB database with 787603 entries. It is much larger than usual ... have to scan the entire database file and is not using indexes. Therefore I think I am not doing ... to an existing database use the Doctor to create a new database in which the index is active
Manual
13

JPA Query Structure (JPQL / Criteria)

is that SQL works with relational database tables, records and fields, whereas JPQL works with Java ... rather than just field values from database tables, as with SQL. That makes JPQL more object oriented friendly ... JPQL Query The following query retrieves all the Country objects in the database: SELECT c FROM
Manual
13

Updating JPA Entity Objects

Modifying existing entity objects that are stored in the database is based on transparent ... Once an entity object is retrieved from the database (no matter which way) it can simply be modified in memory ... (); The entity object is physically updated in the database when the transaction is committed
Forum
13

Database(*.odb) file size on disk

Hello, we have questions about the file size of ObjectDB database on disk. Can you tell ... memory always used by new entities? -Will be the database file automatically reduced?   We have created ... are reused but the the file not resized. The database is at the end empty again, but larger
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13

How to define database structure and insert some initial objects from scratch

the initial database structure of our application? We know objectdb is all about objects and probably doesn't ... jdbc driver for ETL software like Kettle? How about migrating data from another database system? Thanks in advance! To populate the database you will have to write Java code. That code
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13

Using multiple databases

Is it possible for an ObjectDB PersistenceManger/EntityManager to connect to more than one database at a time? Also, can objects in one database reference objects in another database (e.g. through globally unique identifiers)? You can use as many databases as needed at the same time but each
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13

Multi-Threading/Distributed-Database Questions...

Greetings ObjectDB team, All below questions assume a very large database (~1,000,000,000 objects ... : Is it true that two read-only JPQL queries accessing the same database file actually run simultaneously ... to use two database files on two different physical hard disks while still being able to cross reference
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13

Master database switching to read-only mode, possibly caused by slave failure

We had a database failure causing a production outage. Both master and slave databases have failed ... database failed first and possibly caused the master to switch to read-only mode. The sequence ... - MASTER instance stopped responding to write requests. All requests sent to the database during 3
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13

Database absolute filepath

Is there a line of code that can be used to print out my databases absolute path? I have set it as follows: EntityManagerFactory emf = Persistence.createEntityManagerFactory("$objectdb/database/people.odb"); However, the data being shown in \lib\objectdb\database\people.odb is different