dont believe a benchmark that you haven't faked yourself.... but serious: 99% of all time you have no choice. The DB isnt part of your app, you are forced to connect to a legacy one and personally I havent heard of DB4O beeing as mighty as a clustered oracle wich can get up to thousands of tables holding terabyte of data...
Also, the fact they arent showing any details of the implementantion doenst make me believe this is to be looked at serious. Wich version of Hibernate? How did they Batch-Queries ? What caching provider and strategy? etc, etc, etc. I'm currently working on a data-transfer app - transferring from a very old legacy DB into a new one where nothing stays same and i use JPA 1.0 with ToplinkEssentials. By just changing some things the time needed to convert 1750 things went from 7:10 min to 3:50 min. Also the getting of these 1750 entities and 3 corresponding entities each (3 x 1750) and transforming them into a single string to print out just takes 830 ms (including the transaction around all that) on my dev laptopt from a plain MySQL 5.0 (plain means untweaked) DB. (the laptop is a 1,8 GHZ centrino, 1 GB RAM, running at that time NB5.5. Dev, Some instances of firefox, DB2 v 9.1, PostgreSQL 8.0, MySQL4.1, MySQL5.0 as well as 30 other things like outlook...) And i also dont believe that we can get rid of RDBMs in any companie as they have proved to be good at their work, so we will have to use ORM, no matter if we like it or not. JPA 1.0 however is a great step towards, unifieing (hows that written correct??) access and introducing solo-query batch updates and deletes as well as the possibilitie to switch the implementation from one framework (e.g.: hibernate) to another (e.g: kodo) by just changing 2 lines in persistence.xml... as well as afterward tweaking if you need so. Regards Korbinian > -----Ursprüngliche Nachricht----- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Im Auftrag > von Anders Peterson > Gesendet: Dienstag, 3. Oktober 2006 09:51 > An: wicket-user@lists.sourceforge.net > Betreff: [Wicket-user] Database Integration With Wicket > > JPA, Hibernate and other tools like that seem to > (desperately) try to hide the fact that there is an rdbms > underneath. Did anyone here try not having one... > > http://www.db4o.com/about/news/release/2006_09_28.aspx > > /Anders > > Korbinian Bachl wrote: > > Hi All, > > > > since im working now several days with NB and JPA1.0 i think i can > > give some hints.: > > > > First: DONT USE NB 5.5 BETA 1 or 2, use the DEV daily build > instead ! > > - best the one from 29 09 2006 or 30 09 2006, as the Beta's have > > problems in creating entitys from DB in case of Many to > Many relation > > and additional paramters within as well as some other flaws... > > > > if you use the dev daily build... you will just want to > forget eclipse > > and dali ! - its so smooth, fast.. in fact, the time you need to > > download and install the 200 MB + eclipse and plugins, > youre already > > running in NB (small 42 MB) and also have your first JPA > already running.. > > > > however, NB 5.5 has 1 big flaw: the java editor... compared > to eclipse > > its abaout 1 year behind, very sad IMHO. > > > > some things you also might want to remind when working with JPA: > > - currently prefer Toplink Essentials over Hibernate, as > Hibernate is > > only RC and is very unstable > > - NB55: when entitys are created, the EJB QL will take the > parameters > > from the Java environment, not the DB, as well as vars are > written in > > lowercase even if they are uppercase in DB: > > > > e.g: > > > > @Entity > > public class Foo { > > > > private xxx Bar; <-- even this is treated as lowercase !!! > > > > setBar( Bar) {} > > getBar () {} > > } > > > > -> query might be: "delete c from Foo c where c.bar = 'something'" > > and also dont forget to use ..executeQuery() in case of bulk > > operations :) > > > > - currently PostgreSQL's serials are a problem, as they > arent used by > > NB entity creation... means much handwork. > > > > - NB 5.5 dev has also still not the ability to autoamticall do more > > than > > 1 persistence Unit, if you need more (like me) you have to edit the > > persistence.xml by yourself > > > > - right click on project and "Add Persistence" will give you a very > > fast start - not elegant, but hey, you see how it works > > > > - same is with EJB3 code for obtaining JNDI :) - ok, this > is not hard, > > but hey, most programmers are lazy... > > > > Regards, > > > > Korbinian > > > > > > > -------------------------------------------------------------- > ---------- > > *Von:* [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] *Im > Auftrag von > > *Ayodeji Aladejebi > > *Gesendet:* Mittwoch, 27. September 2006 13:01 > > *An:* wicket-user@lists.sourceforge.net > > *Betreff:* Re: [Wicket-user] Database Integration With Wicket > > > > Why should anybody be using eclipse for JPA rather than > NB5.5. Oh my > > God you cant have an idea of how much fun you are missing. > > > > With NB5.5 i configured and setup Persistence within my wicket > > application in minutes and my persistence is working to > fine. Not > > even with the annotation support in my entity beans. i > enjoyed the > > look on my teams faces. > > > > Once again thank you Gustavo for hinting this. > > > > and like igor said, i just subclassed the WebRequestCycle to > > initialize my EntityManagers and boom everything works > > > > Please if you are doing persistence in your wicket applications, > > give NB5.5 a try, (i am not referring to guys that can > handcode the > > entire thing in emacs oh) but its just too lovely > infact am stuck to > > it like ants on sugar now :) > > > > Infact nobody can preach eclipse to me on this...yu see in my > > country, internet access is not yet so fast so i dont > have all the > > bandwidth and project time to be looking for plugin > left, right and > > center...whatever works out of the box is just fine > > > > On 9/25/06, *Gustavo Santucho* <[EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]>> wrote: > > > > > Then if you use eclipse you look at Dali > > > > I strongly recommend Netbeans for JPA development. > > For a comparison, check out > > http://blogs.sun.com/klingo/entry/jpa_netbeans_5_5_vs > > <http://blogs.sun.com/klingo/entry/jpa_netbeans_5_5_vs> > > I use JPA and both Eclipse and Netbeans on a daily basis. > > > > ----- > > Gustavo. > > > > > > > > > -------------------------------------------------------------- > ----------- > > Take Surveys. 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Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get > the chance > > to share your > > opinions on IT & business topics through brief > surveys -- and > > earn cash > > > http://www.techsay.com/default.php?page=join.php&p=sourceforge &CID=DEVDEV > > > <http://www.techsay.com/default.php?page=join.php&p=sourceforg e&CID=DEVDEV> > > _______________________________________________ > > Wicket-user mailing list > > Wicket-user@lists.sourceforge.net > > <mailto:Wicket-user@lists.sourceforge.net> > > https://lists.sourceforge.net/lists/listinfo/wicket-user > > > > > > > > > > -- > > "It takes insanity to drive in sanity" - Me > > > > Aladejebi Ayodeji A., > > DabarObjects Solutions > > Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > Mobile: +234 803 589 1780 > > Web: www.dabarobjects.com <http://www.dabarobjects.com> > > > > Community: > > www.cowblock.net <http://www.cowblock.net> > > > > > > > ---------------------------------------------------------------------- > > -- > > > > > ---------------------------------------------------------------------- > > --- Take Surveys. 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