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2

ObjectDB Clustering VS Hadoop Hbase

Lai Yang Integration with Hadoop distributed file system is still at the idea level. support
2

No clue how to query with collection

Adam hi, okay I've decided that selecting the first item of a collection ain't be a good idea. now I
2

Many connections possible? and will it makes problem in future?

My questions is about : 1-) Can objectdb server handle 200.000+ connections at the same time concurrently ? Does it have queue and cache ? 2-) is it dangerous to use that system on many online users ? kadirbasol Kadir BASOL Having 200,000 concurrent threads is probably a bad idea. Usually
2

Performance problem

with test database. Does anybody have any idea what could be wrong. peric.emil Emil Perić The details
2

Queries are slow on a large database

something wrong. Any idea what the problem is? Thanks. Nargemi Nargemi How many objects should be returned
2

Modifying something with Explorer -> app JPQL with Enum doesn't work anymore

too much, because deploying in container seems to be a necessary step. Maybe this gives you more ideas
2

UserException - Object User#2 belongs to another EntityManager

for ObjectDB to ignore this mismatch (we just have to comment a validity check), but the idea
2

Failed to read DB file while online backup is running

Hi, it happened already few times (seemingly randomly), that some db operation (read and also write) failed with an exception during an online backup of the same DB file was running and was close to finish its task. The version of ObjectDB I am running is 2.6.1.b02 Any idea what is causing
0

com.objectdb.o._PersistenceException: Failed to locate set method for field property using reflection

for the field being complained about. Any ideas would be greatly appreciated. Code works fine when running
0

Issue with UPPER ?

though... Any idea? Alex quasado Alexander Adam Sorry, forgot to mention that if for Case (2

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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