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From "Stefan Guggisberg" <stefan.guggisb...@gmail.com>
Subject Re: Persistence managers and file storage
Date Wed, 25 Oct 2006 14:51:44 GMT
On 10/25/06, Java Prog <javaprimer@gmail.com> wrote:
> Thank you very much.
> It clears things out regarding cqfs.
>
> Regarding DerbyPersistance manager - as preferred persistence manager:
> should it behave better than SimpleDBPersistanceManager (faster?)

DerbyPersistanceManager extends SimpleDbPersistanceManager
and, apart from overriding closeConnection(), provides defaults for some
configuration options of SimpleDbPersistanceManager.

do you have a performance issue with SimpleDbPersistanceManager?

cheers
stefan

>
> Regards
>
>
> On 10/25/06, Stefan Guggisberg <stefan.guggisberg@gmail.com> wrote:
> > hi,
> >
> > On 10/24/06, Java Prog <javaprimer@gmail.com> wrote:
> > > Dear all,
> > > I use SimpleDBPersistanceManager as persistence manager.
> > > When file (2-3 mb in size) is checked in all other operations
> > > are halted until it is stored. It presume that this occurs
> > > due to a single connection to the database.
> > > I would like to know does someone has similar experience and
> > > what to do in such case? For small files (100 -200kb) it seems to
> > > be OK.
> > >
> > > Also, I would like if someone can clarify cqfs licence?
> >
> > cqfs is a custom FileSystem implementation developed
> > by Day Software. the license states that it's free for
> > non-commercial use. you can't redistribute it without
> > day's permission.
> >
> > > What is meant by free to use but not open source?
> >
> > this means that you can use the distributed binaries
> > but you don't get the source code.
> >
> > > In which cases I can use it in my application?
> >
> > the short answer is you don't need it ;)
> >
> > in early days of jackrabbit there were only filesystem-based
> > persistence managers (e.g. XMLPersistenceManager) available.
> > the performance of those suffered severely when used
> > on a windows file system. cqfs was meant to be an alternative
> > filesystem to be used on windows.
> >
> > since we're now using DerbyPersistenceManager as the
> > prefered persistence manager you don't need cqfs anymore.
> >
> > cheers
> > stefan
> >
> > >
> > > Regards
> > >
> >
>

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