ObjectDB Database Search

! You can check it by repeating insertion of   a pic of multiples . I can not send the 7GB file ... objects have identity and support multiple references without duplication. All the other types ... loops and file reading operations" will cause the persistence of my class into multiple copies? TIA

with multiple parents), which are unlikely to be solved by the Doctor. Is it the a log for the database ... there should be only one process that accesses the database file. Accessing a database from multiple processes concurrently can cause exactly this issue of structural issues (orphan pages and page with multiple

Hi, does anybody have experience with multi tenant setup of objectDB. For example using multiple schema or multiple database. How to handle connections between app (Jboss Wildfly) and pass query ... use ObjectDB with multiple databases. It is very easy when accessing databases directly (by

We are creating a web app that will have multiple different clients, each on their own EC2 ... given time (100k absolute maximum). We will probably have multiple instances per client for availability ... connections from multiple instances. But from what I can tell, there will be about a 50% performance drop from using Server mode to accommodate the

, Paul paulfo Paul Boon See this sections in the manual regarding SELECT queries that select multiple expressions: Multiple SELECT Expressions Result Classes (Constructor Expressions) What you need is not unique for GROUP BY but for common for queries that return multiple expressions in every result. support Support

when accessing PersistenceManager by multiple threads? 2) Does it lock at PersistenceManager ... PersistenceManager / Transaction methods are synchronized so multiple threads should be able ... a queue) you will need multiple   PersistenceManager instances. In ObjectDB 1.x pessimistic locks

behavior. Embedded objects cannot be shared by multiple references. If you have multiple references to an embedded object during persist then multiple instances of that embedded object are stored in

one  EntityManagerFactory per application, with multiple   EntityManager instances for multiple database connections. support Support

Hi I have not seen, cursory search was not informative, if odb can be embedded like derby.  How does odb handle byte[].  How do you create multiple dbs.  Finally is there a gui ... (see supported types ). How do you create multiple dbs. See this documentation page .  Finally

code is per machine. Use your site license to generate multiple activation codes. You may also specify multiple activation codes in the configuration file (in order to share the same objectdb.conf file

. However, if your application use multiple threads that execute multiple queries against ObjectDB simultaneously

your accessing that object in the database from multiple methods simultaneously or you've got some ... . If you still get the error then you can try waiting before trying the transaction again or trying multiple times. jgleoj23 Joseph Gardi

@ GeneratedValue primary keys are sequential. So when you persist multiple new objects their primary ... primary keys. Automatic @ GeneratedValue primary keys are sequential. So when you persist multiple new

allocation to commit or flush - multiple IDs for multiple objects can be allocated together in one round

; } A possible solution: Avoid multiple Attribute instances with identical type / value by defining a composite ... are currently used in such comparison, so it might be still more efficient to use multiple JOINs in this case

multiple processes (embedded mode supports concurrently only within a JVM, i.e. multithreading ... server mode supports accessing a database concurrently from multiple processes (embedded mode

multiple threads concurrently, or if the same entity instance is modified from different threads ... multiple threads . All modifications should be confined to a single thread per transaction to ensure consistency. support Support

a single EntityManagerFactory with multiple   EntityManager instances. It is uncommon to create multiple   EntityManagerFactory instances as demonstrated by your code. support Support

is also for a single user with that specific operation? ObjectDB can use multiple cores to serve concurrent requests from different users, and also tries to use multiple cores for a single request

the database at the same time using multiple threads. However, if all the threads share the same ... ) and you have to use multiple EntityManager/PersistenceManager instances, usually one per thread

multiple EntityManager instances, one per thread. Every thread with its own EntityManager has a private persistence context, i.e. the same database object is represented by multiple separate memory

.  If there is one could this cause the behavior? Yes. ObjectDB supports multiple snapshots of the database for multiple connections (representing by EntityManager instances) by delaying changes

one every time. Out of curiosity, is my current method thread-safe? Can multiple entity managers exist at the same time? Flying Banana Jiacong Xu Creating multiple EntityManagerFactory instances is thread safe

practice in OSGi. Especially am I wondering how I should get this working when I have multiple bundles ... of OSGi with ObjectDB including multiple bundles with entity classes. Unfortunately we do not

where multiple threads can hit a shared counter (which is used to track separate customers product

multiple   EntityManagerFactory Instances. support Support

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 get multiple ClassNotFoundExceptions like : [2011-06-04 05:34:14 #2 type.loader] java.lang

We installed a security hotfix on all our VM instances. BAM all DB licenses are inactive, now we have to create new keys for all of them. We sometimes have to create new keys if we update to a newer objectdb version. We had to create new keys multiple times because of the unstable activation

, otherwise the same result may have multiple different order values. Your third query, although logically

; The screenshot of post #1 was taken after triggering multiple full GCs (via the option in JavaVisualVm

with two String fields key and value, and store your global properties using multiple entity objects

multiple threads. So yeah, without some intense analysis (we're talking hundreds of fields with many layers

of one writer and multiple readers provides better performance because the coordination between the servers

are always slower because multiple entities are involved. You can improve the performance of queries by using

I'am new to study JDO. Can and How I use JDO an distributed transaction?( multiple database)。 Is ObjectDB also provided JCA util just like DataNucleus? Reference：     Spring Framework Reference Documentation       JCA, JTA, and JDO Transactions - Using

same machine.   This is happening if multiple thread(20-50) accessing db parallelly for 30-40 min

by ObjectDB, as the supported replication is based on one master and multiple slaves

creates multiple PersistenceManagerFactory instances and some of them are not closed. support Support

We've got this exception, when running DB Doctor in parallel on multiple DB files. com.objectdb.o.UserException: Attempt to open a non existing file './tmp.E3Mwf13d7o/objectdb_7666012114926572695/DoctorSection_0.fls' at com.objectdb.o.MSG.a(MSG.java:64) at com.objectdb.o.LFL.x(LFL.java:809) at com

must be composed from the parent Id and the child subkey. And I have multiple child subtypes in which child

that, because we are using multiple separate ObjectDB Servers. Any server is responsible for managing few DB files

where our object db home is located at as we might have multiple server instances running on multiple

; PersistenceManager by multiple threads and / or other PersistenceManager instances. You wrote: Both threads ... multiple threads and / or other PersistenceManager instances. You wrote: Both threads were using

with multiple JOIN operations with very slow execution time you may be able to manually select the best

We encountered an issue that caused an outage last Friday on multiple ObjectDb server instances. The problem occurred while trying to close the EMF to three separate ODB databases, residing on different ObjectDb Servers,  the exceptions were thrown on two of our servers (TransactionServers

class loader or multiple class loaders? Please verify that you close every EntityManager

one EntityManagerFactory instance, use it for creating multiple EntityManager instances, and remember to close each

Added support for a JPQL update query with multiple variables (issues #2369, #3009)

I am encountering problems (complexities) with EntityManager registration of entities across multiple modules in a multi-module Maven project. I have a  entities under many different paths in many different modules, and frequently evolving/changing. JPA2 persistence.xml does not

different parts of their projects in several enhancement runs). If multiple enhancement runs are allowed