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Posted to users@jackrabbit.apache.org by Corné A <tr...@gmail.com> on 2008/03/10 17:07:33 UTC

Multiple PersistenceManagers

Hi,

 We have a dispute amongst our developers and can't decide on wich
 PersistenceManager to use on a run a linux 10 box.

 some are in favor of a Database PM
 (org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager)
 and some for the File-System PM.

 Main arguments concern performance and backup.

 Since I think just using both in real-life will resolve the issue.
 So is it possible to maintain 2 PersistenceManagers so we can still
 make a switch.

 Thanks
 Corné

Re: Multiple PersistenceManagers

Posted by Corné A <tr...@gmail.com>.

Thanks I do understand now i first read this
http://en.wikipedia.org/wiki/Atomicity_%28disambiguation%29
but that didn't give me clue

2008/3/17, Thomas Mueller <th...@gmail.com>:
>
> Hi,
>
>
> I don't really get the
> > concept of 'Atomic'
>
>
>
> See http://en.wikipedia.org/wiki/Atomicity
>
> Regards,
>
> Thomas
>

Re: Multiple PersistenceManagers

Posted by Thomas Mueller <th...@gmail.com>.

Hi,

I don't really get the
> concept of 'Atomic'


See http://en.wikipedia.org/wiki/Atomicity

Regards,
Thomas

Re: Multiple PersistenceManagers

Posted by Corné A <tr...@gmail.com>.

Thanks for your reply Thomas,

And indeed I read the FAQ's and Wiki but I don't really get the
concept of 'Atomic' and multiple Perisistance.

Some wild grasp; couldn't I use 2 'Workspaces'  with differrent
PersistenceManager?

Corné

2008/3/10, Thomas Mueller
> Hi,
>
>  I'm not sure if you have read:
>  http://wiki.apache.org/jackrabbit/PersistenceManagerFAQ
>  specially 'Consistency / Atomicy'
>
>
>  > So is it possible to maintain 2 PersistenceManagers
>
>
> You could write a 'DualPersistenceManager' that stores everything in
>  both PMs but only reads from one. I did that once; the problem is
>  configuration (how to configure both at the same time).
>
>  Regards,
>
> Thomas
>
>
>  On Mon, Mar 10, 2008 at 5:07 PM, Corné A <tr...@gmail.com> wrote:
>  > Hi,
>  >
>  >   We have a dispute amongst our developers and can't decide on wich
>  >   PersistenceManager to use on a run a linux 10 box.
>  >
>  >   some are in favor of a Database PM
>  >   (org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager)
>  >   and some for the File-System PM.
>  >
>  >   Main arguments concern performance and backup.
>  >
>  >   Since I think just using both in real-life will resolve the issue.
>  >   So is it possible to maintain 2 PersistenceManagers so we can still
>  >   make a switch.
>  >
>  >   Thanks
>  >   Corné
>  >
>

Re: Multiple PersistenceManagers

Posted by Thomas Mueller <th...@gmail.com>.

Hi,

I'm not sure if you have read:
http://wiki.apache.org/jackrabbit/PersistenceManagerFAQ
specially 'Consistency / Atomicy'

> So is it possible to maintain 2 PersistenceManagers

You could write a 'DualPersistenceManager' that stores everything in
both PMs but only reads from one. I did that once; the problem is
configuration (how to configure both at the same time).

Regards,
Thomas

On Mon, Mar 10, 2008 at 5:07 PM, Corné A <tr...@gmail.com> wrote:
> Hi,
>
>   We have a dispute amongst our developers and can't decide on wich
>   PersistenceManager to use on a run a linux 10 box.
>
>   some are in favor of a Database PM
>   (org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager)
>   and some for the File-System PM.
>
>   Main arguments concern performance and backup.
>
>   Since I think just using both in real-life will resolve the issue.
>   So is it possible to maintain 2 PersistenceManagers so we can still
>   make a switch.
>
>   Thanks
>   Corné
>