jackrabbit-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Simon Gash" <Simon.G...@gossinteractive.com>
Subject RE: [Jackrabbit Wiki] Update of "PersistenceManagerFAQ" by edgarpoce
Date Thu, 09 Jun 2005 11:40:53 GMT
Ah I see what you mean it's a very good analogy. I guess I view
JackRabbit differently.

Not being at the beginning of the project (joining 6 months ago) I came
to it from a different angle. Having worked with RDBMS for the last 15
years does make you a bit biased. I've always seen it as a much better
data dictionary minus the storage bit.

I think there will be an adoption problem if I ask my client's to drop
their RDBMS vendor in favour of a relatively new storage and retrieval
technology. Then there's the problem with all those dba's...  ;)


-----Original Message-----
From: Stefan Guggisberg [mailto:stefan.guggisberg@gmail.com] 
Sent: 09 June 2005 12:12
To: jackrabbit-dev@incubator.apache.org
Subject: Re: [Jackrabbit Wiki] Update of "PersistenceManagerFAQ" by

On 6/9/05, Simon Gash <Simon.Gash@gossinteractive.com> wrote:
> I don't think that's right either. It's the wrong way round, its up to

> the developer to make sure the decision about what is 'best' as a type

> of persistence manager. There is no way any of us could know already 
> how to measure what is 'best' for any other developers particular
> Sorry to be so pedantic but flexibility of storage is a huge strength 
> of the jackrabbit software (and of the JSR 170). Getting the developer

> to make the right decision for their own particular problems is the 
> trick bit.
me too sorry to be so pedantic ;) the role of the PM in jackrabbit (at
least as  i originally designed it) is comparable to the role of that
layer in a rdbms that reads and writes raw table/record data to/from the
disk (e.g. tablespace files in oracle). you wouldn't expect oracle to
store the raw table/record data in ORM instead of its tablespace files i
btw, edgar's PM FAQ quite nicely explains the role of the PM in


> Simon
> -----Original Message-----
> From: Serge Huber [mailto:shuber2@jahia.com]
> Sent: 09 June 2005 11:39
> To: jackrabbit-dev@incubator.apache.org
> Subject: Re: [Jackrabbit Wiki] Update of "PersistenceManagerFAQ" by 
> edgarpoce
> If I may, I think just changing the phrasing to something like :
> Persistence managers that store the item states in a complex schema 
> are not the best option for most users.
> Regards,
>   Serge Huber.
> ps : my schema is not that complex :) And I will probably in later 
> version adopt something similar to Edgar's JDBC schema (with one table

> per property type).
> Stefan Guggisberg wrote:
> >hi edgar
> >first of all thanks for this very informative and usefull FAQ.
> >i only have one comment:
> >
> >
> >
> >>=== What about ORM-backed PMs? ===
> >>Persistence managers that store the item states in a complex schema 
> >>are not the right way to go. Keep it simple, e.g. the 
> >>objectPersistenceManager stores the item states as a raw stream of
> bytes.
> >>
> >>
> >>
> >i remember having said something like that in a previous thread. this

> >is my very personal view and allthough i still think it is correct 
> >i'd rather like to have it understood as a recommendation, not an 
> >absolute statement. what do you think?
> >
> >thanks
> >stefan
> >
> >
> >
> Come visit us at:
> Internet World 2005. June 14 - 16, Earls Court, Stand # A60
> Government Computing Expo. June 21 & 22, Earls Court, Stand # 804
> SOCITM Annual Event. October 16 - 18 Brighton Hotel, Stand # 28 GOSS -

> Ranked 4th in the Deloitte Technology Fast 50 Awards 2004 and 88th in
the Deloitte Technology Fast 500 EMEA.
> This email contains proprietary information, some or all of which may
be legally privileged. It is for the intended recipient only. If an
addressing or transmission error has misdirected this email, please
notify the author by replying to this email. If you are not the intended
recipient you may not use, disclose, distribute, copy, print or rely on
this email.
> Email transmission cannot be guaranteed to be secure or error free, as
information may be intercepted, corrupted, lost, destroyed, arrive late
or incomplete or contain viruses. This email and any files attached to
it have been checked with virus detection software before transmission.
You should nonetheless carry out your own virus check before opening any
attachment. GOSS Interactive Ltd accepts no liability for any loss or
damage that may be caused by software viruses.

View raw message