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[ODB1] Chapter 8 - ObjectDB Server

An ObjectDB server can manage one or more databases. Databases that are managed by a server can be accessed by multiple processes simultaneously. In addition, the server supports accessing these databases from remote machines by TCP/IP. More details about client server mode vs. embedded database mode are discussed in Section 1.2.... can be accessed by multiple processes simultaneously. In addition, the server supports accessing these databases from remote machines by ...

 
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ODB should auto-restart if it detects it's necessary

Hi! I find very tricky the need to restart ObjectDB server after schema modifications in a distributed environment. Moreover, not doing it does sometimes trigger ugly errors, which mean application downtime. It might be very useful to have an additional feature (that could be enabled/disabled in objectdb.config) that each time ObjectDB detects a schema change that requires restart, it should automatically restart itself. This way we save a lot of headaches from our dev. ops. Currently we have to manually do: #1 2014-03-29 08:33 Hi! I find very tricky the need to restart ObjectDB server after schema modifications in a distributed en ...

 
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Java 6/7 Performance Comparison

Hey, I've been using ObjectDB for a small scale home project to gain some familiarity before proposing it in a commercial project at work. What I've noticed though is that when using objectdb in embedded mode based on the console tutorial, there seems to be a bit of a performance gap running the same code between Java 6 & 7 Tracing it through I can see the bottle neck seems to be at the creation of the entity manager and I was wondering if there are any additional configuration options I may have missed while running under java 7. #1 2014-03-06 14:31 Hey, I've been using ObjectDB for a small scale home project to gain some familiarity before proposin ...

 
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best practice for DB recovery

Hi, I'm trying to come up with the best approach for supporting some kind of hot standby for my master DB. ... or is there a more standard way for doing this? In addition, what is objectdb approach/roadmap regarding the support of hot ...

 
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Eager Fetch is not stable for collection or map types?

Hi, thanks very much for your helpful software. The problem is the storage of collection or map types is not stable, we lost them sometimes after JVM restarted. Eager fetch is properly set.And we still found that the storage is stable when we not use generic, such as "private List users = new ArrayList();" instead of "private List<User> users = new ArrayList<User>();".   The code about entity and fetch is: #1 2011-11-22 12:19 Hi, thanks very much for your helpful software. The problem is the storage of collection or map types is not ...

 
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Unexpected NoSuchFieldError exception

Hi, suddenly running into a number of issues:   1) no-arg constructor (error 352) 2) java.lang.NoSuchFieldError: __odbTracker 3) Attempt to start a transaction while another transaction is running. In each case, I've found it difficult to figure out where to find the right documentation. Below is an example that has #1 and #2 together. #1 2017-02-24 02:45 Hi, suddenly running into a number of issues:   1) no-arg constructor (error 352) 2 ...

 
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Homepage and forum nearly inaccessible

#1 2014-05-17 09:24 Homepage and forum nearly inaccessible from France/Germany, takes minutes to react. ...

 
api-jdo

javax.jdo.Transaction

The JDO Transaction interface provides for initiation and completion of transactions under user control.(Interface of JDO)

 
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Replication failed

Dear support members, I am trying to set up a replication url in objectdb.conf and have the the following error in the log files: [ObjectDB 2.3.4] javax.persistence.PersistenceException Failed to connect to server 127.0.0.1:6136 (Connection refused) (error 522) at com.objectdb.jpa.EMF.createEntityManager(EMF.java:176) My objectdb.conf: #1 2012-07-02 09:06 Dear support members, I am trying to set up a replication url in objectdb.conf and have the the following ...

 
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Licensing

Hello! In some older post "support" wrote: "A single server license is for one activation of one machine and is non transferable.". What if one of our servers or laptops needs to get replaced? Do i have to purchase a new server license? I know that there is a site license but we are only two developers. A site license would be 3 times more expensive than two server licenses. #1 2012-08-15 17:04 Hello! In some older post "support" wrote: "A single server license is for one activation of one machine ...