hi.
thanks for answering.
I am working with JDO and I am getting mediocre results on reads, updates(the worst),
and creates.
I have tried to multithread my calls but I get some weird Jconnect/sybase errors(see
post on [castor-dev] threading requests posted yesterday]
I am not looking to match raw JDBC speed obviously, but would like to go above the low
results I am getting: 15-25 transactions/second compared to 100-250 for the same SQL
actions from same server to same db through jdbc. These tests are done with a single
object that maps to a single table in the database
I would generally say that the only bottle neck at his point is castor since my dev
box, db, and network all have very high specs.
here are some castor issues/questions:
-I am using a DateStampable object
-I am creating a new Database object for every transaction(according to Castor docs is
ok)
-I am preloading all objects with db.load before starting my tests
-I am doing no configuration of jdo other than configuring the JDO object to connect
to the proper db. Here's the code:
private Database getDatabase() {
// Define the JDO object
JDO jdo = new JDO();
jdo.setDatabaseName( "mydb" );
jdo.setConfiguration( "file:./database.xml" );
jdo.setClassLoader( getClass().getClassLoader() );
jdo.setDatabasePooling(false);
Database db = null;
try {
db = jdo.getDatabase();
} catch (PersistenceException e) {
e.printStackTrace();
}
return db;
}
-after that i simply do db.begin() .... operations....db.commit();
hope this is enough info.
Florian Hehlen
-----Original Message-----
From: Arnaud Blandin [mailto:blandin@;intalio.com]
Sent: Thursday, October 24, 2002 2:10 PM
To: [EMAIL PROTECTED]
Subject: Re: [castor-dev] getting started
Hi Florian,
You should give more information on the performance problem you are
experiencing: is it the XML side or the JDO side? What kind of issue do
you face? etc...
Arnaud
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:Florian.Hehlen@;ubsw.com]
> Sent: Thursday, October 24, 2002 1:58 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [castor-dev] getting started
>
> you are missing the xerces jar in your classepath.
>
> it should be in the lib folder of your castor release.
>
> Florian Hehlen
>
> ps: I am having performance problems with castor.... so if you have
> some insight please, I would like to exchange on the subject.
>
> -----Original Message-----
> From: * * [mailto:mrcdbs@;hotmail.com]
> Sent: Thursday, October 24, 2002 1:47 PM
> To: [EMAIL PROTECTED]
> Subject: [castor-dev] getting started
>
>
> hi,
>
> I've just finished reding the documentation regarding castor jdo,
> and am
> anxious to try it out?
>
> I have made a simple table in my mysql database and a correspongin
> class
> called user with get and set methods to get a users name.
> I've also made a simple main class where I've specified the mappling
> and the
> database.xml file all set to point to my database.
>
> when I'm trying to run this I get the following error
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/apache/xml/serialize/XMLSerializer
> at org.exolab.castor.xml.Unmarshaller.initConfig(Unknown
> Source)
> at org.exolab.castor.xml.Unmarshaller.<init>(Unknown Source)
> at org.exolab.castor.xml.Unmarshaller.<init>(Unknown Source)
> at
> org.exolab.castor.jdo.engine.DatabaseRegistry.loadDatabase(Unknown
> Source)
> at org.exolab.castor.jdo.JDO.getDatabase(Unknown Source)
> at simpletest.<init>(simpletest.java:15)
> at simpletest.main(simpletest.java:28)
>
> It seems that I've forgotten some thing, can you please tell me what
> it is?
> Many thanks in advance
> Marcus
>
>
>
>
> _________________________________________________________________
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>
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