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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

ObjectDB Clustering VS Hadoop Hbase

of the performance problem. The ObjectDB cluster may be a distributed database, I guess. But I dont know ... larger databases, but that will come with a price tag of slower performance. In using composite urls ... Support >but that will come with a price tag of slower performance. Yes, HDFS can not support rand

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

Open several objectdb databases the same time

are implemented as client-server connections. support Support What about database access performance ... ? Harman Alexander Golyshkin The first process will have the performance of embedded mode and the others will have the performance of server mode, which is slower. support Support Brilliant! I can confirm

Vacuum - Reclaiming Unused Space In Odb

feature appears to copy the dead space as well so isn't performing the vacuum. If there is no way ... it takes to perform an online backup for large databases. Our organization requires daily backups on our data and we have a limited window of time to perform these backups. We've looked into using

Database size is much larger than expected (x2)

input data, how to test the real performance of objectdb? The structure of my class is <URI>::=(<sUrl ... the performance of ObjectDB with real data. But if there is a problem you will have to isolate it in order

index - data rewrite

deleted on which we applied indexing. We found a solution for this past performance problem and didnt try with indexes any more until now when we have another performance issue which we believe indexes

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

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 access error , Doctor hanging on trying to repair, production shutdown at our biggest customer

affects the performance significantly, right ? hgzwicker Hans-Georg Zwicker > the fix in 2.7.1 ... under heavy load. Recording affects the performance significantly, right ? If you write the recording

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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