Hi All,
I've evoluated orm and the finalists are hibernate and cmp.So my question is about hibernate matureness.I 've read for the projects that uses it,but I can't figure how big are they..... the project that we are going to design is about 2000 tables and 1000 views and we are going to use one-class-to-one-table strategy.We have cluster environment with loadBalance at component level,we plan to use sessionFacade and we can sacrifice the loadBalancing between SLSB and CMP,and could get SLSB+Hibernate.So my question is :
Is there any bigger or common projects that uses hibernate and how the hibernate takes huge load and is the scalability good enough?

Regards,
Vladislav

You can find some info about hibernate performance and scaling here:http://www.hibernate.org/15.html#A5

There are a number of usage reports here: http://www.hibernate.org/113.html

I'm just now starting to find out about some really big projects (in major corporations) using Hibernate - and hopefully, in time, I'll be able to talk about some of them publicly. For now, projects like this tend to be quite "shy" about talking about the OSS technology they use so, my advice remains what it has always been:

Hibernate was designed from the beginning for effortless scalabilty in three directions:

* horizontal (cluster)
* vertical (many threads)
* complexity of data model

But of course, any project which requires high scalability should do its own stress testing in its own deployment environment. It is simply not possibe to make blanket statements like "hibernate can scale to XX000 concurrent requests". It all depends upon your hardware and your application.

(OTOH, I'm pretty damn confident that Hibernate apps outperform *CMP*, and all the anecdotal evidence I have supports this!)

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If you need advice with regard to this kind of stuff, the commercial consulting is a great option - we can be much less vague in person.
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Gavin