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Should I use ObjectDB and JDO?

My application is not meeting required performance because JavaDB appears to be my bottleneck. I ... /ObjectDB are no longer keeping current? If they can meet my current needs (EXTREME performance ... are less commonly used than RDBMS, but they have their market, especially when performance is essential

JPA vs JDO - which is more efficient for OneToMany queries?

I'm curious about the trade offs between JDO and JPA. Seems to me that JDO will perform better ... , is there a performance hit? ie: with the JDO version you have essentially an index from ... ) ? If no performance difference, then JDO wins due to static typing, in my view. dmoshal David Moshal

in-memory and on-disk support?

memory as cache, so you may find that you get the performance that you need also with one database ... performance and because ObjectDB uses a single file (you can disable logging, recovery ... for space allocation later is a small additional advantage. It will only help query performance

com.objectdb.o.TEX: Type ... is not found, for a class that's already been enhanced successfully.

Noticing very poor performance from ObjectDB, not exactly sure what the problem is. Tried ... " postion="14:23" /> </token> </token> </token> dmoshal David Moshal > Noticing very poor performance from ObjectDB, not exactly sure what the problem is. Try to isolate the slow performance, e.g

Online backup problem

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 ... also tried to perform backup from standalone application - with the same result

Optimistic locking: prevent version increment on entity collection attribute

side). Regarding performance, it may improve performance of adding / removing readers, but traversal from

Mismatch client-server protocol prefix

this change on the server? How does this affect performance? The implementation hasn't changed ... Ralph Moser Yes, this is a server configuration. It may decrease performance a bit or may not

Connection performace after upgrade to objectdb 2

Hi, I have performance problems with objectdb 2 when I tried to get the PersistenceManagerFactory and PersistenceManager : In objectdb 1 : PersistenceManagerFactory pmf = JDOHelper ... for JPA/JDO, etc.) affect initialization performance (more files to look for and analyze

query.getResultList() throws ClassCastException

and for the test. Version 2.3.1 fixes the exception. Some performance tips for this test: You can improve persist performance by using smaller transactions (commit per 50,000 objects ... performance by retrieving field values rather than entity objects (when applicable

Database File Encryption

such as using an encrypted file system, but you will pay a performance penalty. This also means that the entire DB is encrypted which is okay, but if performance is an issue and only a small percent ... (see Oracle). In our world, not a lot of data needs to be encrypted, so performance for the majority

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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