db-ojb-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Josh Morris <josh.mor...@unitt.org>
Subject Re: Shall we drop c/s mode?
Date Mon, 27 Jan 2003 15:34:29 GMT
I have fixed the c/s mode for a product at our site and I am happy to
give that fix to OJB. However, I agree that the performance is lousy, I
am actually trying to remove the usage of it. The time required to
handle this effectively is non-trivial. I personally feel, for whatever
it is worth, that there are other areas that really benefit from the

Josh Morris

On Sat, 2003-01-25 at 13:38, Thomas Mahler wrote:
> Hi all,
> I'd like to have a decision how to proceed with the client server mode.
> It has not been properly maintained since the 0.9.7 release and a lot of 
> junit tests fail.
> It won't be impossible to fix it, but still a lot of work.
> But before we start to repair it I'd like to discuss if there is a 
> really a "business need" for c/s mode.
> The original idea was to show that OJB is scalable in itself. But I 
> doubt if this is really a requirement.
> If there is a scalibity issue in an application it will be in most cases 
> in the web- or EJB-tier. If an Application is clustered accross multiple 
> J2EE containers it's quite easy to use OJB in singlevm mode and let it 
> share the clustering.
> If the DB is the bottleneck you can use DB clustering. So I don't see a 
> real demand for OJB clustering in this context.
> The only possible usecase I see for C/S is:
> If a client app should not use a JDBC driver but still be able to access 
> a DB. In this case OJB c/s mode could be a solution.
> But is this a scenario we have to cover?
> The C/S mode also has some disadvantages:
> - It is really slow (at least 10 times slower than singlevm mode!)
> - it produces extra maintenance costs
> - it is a burden to integrate it into the junit testruns (takes 20 
> Minutes or so...)
> - Users are often confused about C/S mode. Some users think that it 
> could be a replacement for an app server...
> Am I missing something fundamental? Do we still need c/s for some reason?
> Of course we should also ask the users before we drop this feature.
> What do you say?
> cheers,
> Thomas
> --
> To unsubscribe, e-mail:   <mailto:ojb-dev-unsubscribe@jakarta.apache.org>
> For additional commands, e-mail: <mailto:ojb-dev-help@jakarta.apache.org>

View raw message