69 | 500Mb ObjectDb database opening issueHi, I have observed that 500 Mb objectDb database opening time is very slow (~3 seconds ... any way to speed-up open time for big databases? Definitely, it's too long for 500 Mb database! We gonna work with ObjectDb databases which may have size more than 5Gb and opening database time |
68 | Unexpected exception during open the databaseHello, do have an idea why we get following exception sometimes, if we open a database? Exception 1 ... your company. The problem seems to be related to opening and closing the database for a short period ... block from objectdb.conf all works fine during opening the database. The automatic index update is not |
67 | Failed to synchronize replicated database database, we'll get following Exception: com.objectdb.o.UserException: Failed to synchronize replicated database at com.objectdb.o.MSG.a(MSG.java:64) at com.objectdb.o.RPT.a(RPT.java:100 ... For replication to work the slave database must start with a copy of the master database in the replication |
16 | Retrieving JPA Entity ObjectsThe Java Persistence API (JPA) provides various ways to retrieve objects from the database ... of the database. The persistence context serves as a cache of retrieved entity objects. If a requested ... with data that is retrieved from the database (or from the L2 cache - if enabled). The new entity object |
14 | Storing JPA Entity ObjectsNew entity objects can be stored in the database either explicitly by invoking the persist method ... an instance of the Employee entity class in the database: Employee employee = new Employee("Samuel ... and changes its state to Managed. The new entity object is stored in the database when the transaction |
14 | Working with JPA Entity Objects), which can represent physical objects in the database. Managing an ObjectDB Object Database using JPA ... database objects. Entity Object Life Cycle The life cycle of entity objects consists of four states ... the database. An entity object becomes Managed when it is persisted to the database |
13 | JPA Primary KeyEvery entity object that is stored in the database has a primary key. Once assigned, the primary key cannot be modified. It represents the entity object as long as it exists in the database. As an object database, ObjectDB supports implicit object IDs, so an explicitly defined primary key is not |
13 | Database access error , Doctor hanging on trying to repair, production shutdown at our biggest customerwe have a database shutdown, logs are showing: [2017-07-10 21:07:23 #1 store] Database 'F ... : SectionClassifier{2->merger[2699]-missing:1} on running Doctor it hangs after reading in the database, just ... . If you need to repair the database (i.e. it is not a test database but contains useful data |
1 | [ODB1] Chapter 8 - ObjectDB ServerAn ObjectDB server can manage one or more databases. Databases that are managed by a server ... these databases from remote machines by TCP/IP. More details about client server mode vs. embedded database mode are discussed in Section 1.2. Because the JDO API and the format of the database file |
1 | [ODB1] Chapter 3 - Persistent ClassesPersistent Classes are user defined classes whose instances can be stored in a database using JDO. Instances of these classes that represent objects in the database are called persistent objects or persistent instances. Objects that do not represent anything in the database (including instances |
