About modify

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Replication Issue

Hi, I am trying to use replication for this first time - so most likely I am doing something wrong. I have server on which I run my master DB server java -cp objectdb.jar com.objectdb.Server start -conf objectdbMASTER.conf on the same server I run a java program - which is writing objects every second a database KAKI.odb - here is the code: ... <dir path = "/" permissions = "access,modify,create,delete" /> </user > ... <dir path = "/$user/" permissions = "access,modify,create,delete" > <quota ...

 
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Performance tuning, best practices

we have a system where we serve from a host process around 200 clients connected via webSockets (Jetty). The core process is running on a dedicated Windows 2012 server with 16 GByte RAM and 8 processor cores.  What is strange for us is that max 20% of the cpu resources are used and the IO subsystem is at maximum 30% of activity under heavy load but database queries are let's say not at the speed we would expect. We have currently 20.000.000 objects in the database, our configuration settings are: ...    <dir path="/" permissions="access,modify,create,delete" />   </user>   <user ...    <dir path="/$user/" permissions="access,modify,create,delete">     <quota directories="5" ...

 
release

2.4.5

Release date: 2012-12-13 Download (5.41 MB) Binary:  objectdb-2.4.5.zip You should start by following a  tutorial or reading the manual ...

 
release

2.2.2

Release date: 2011-04-22 Download (5.07 MB) Binary:  objectdb-2.2.2.zip You should start by following a  tutorial or reading the manual ...

 
manual

Database Connection using JPA

Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction.... can serve the entire application. Operations that modify the content of a database require active transactions. Transactions are ... ( ) ; // Operations that modify the database should come here. em. getTransaction ...

 
release

2.4.4

Release date: 2012-10-13 Download (5.4 MB) Binary:  objectdb-2.4.4.zip You should start by following a  tutorial or reading the manual ...

 
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Insertion Speed Rate and Batch Load

1. I got about 10K inserts / second, is it normal? I would expect more than that, like close to 100K/second. I can definitely do 80K inserts/seconds on Oracle with batch insert on table with one primary key. 2. Is batch update/insert operation supported? I attached the files. #1 2011-05-03 22:01 1. I got about 10K inserts / second, is it normal? I would expect more than that, like close to 100K/second. I ca ...

 
release

2.4.3

Release date: 2012-08-26 Download (5.4 MB) Binary:  objectdb-2.4.3.zip You should start by following a  tutorial or reading the manual ...

 
manual

JPA Query Structure (JPQL / Criteria)

Explains the structure of a JPQL query, which consists of 6 clauses: SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY.... where(restrictions) CriteriaQuery's method Modify the query to restrict the query result according to the conjunction of ...

 
release

2.4.2

Release date: 2012-07-22 Download (5.4 MB) Binary:  objectdb-2.4.2.zip You should start by following a  tutorial or reading the manual ...